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      "body": "Congratulations @elsedongusu! You have completed some achievement on Steemit and have been rewarded with new badge(s) :\n\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/firstcommented.png)](http://steemitboard.com/@elsedongusu) You got a First Reply\n\nClick on any badge to view your Board of Honor.\nFor more information about SteemitBoard, click [here](https://steemit.com/@steemitboard)\n\nIf you no longer want to receive notifications, reply to this comment with the word `STOP`\n\n**Do not miss the [last announcement](https://steemit.com/steemitboard/@steemitboard/steemitboard-new-level-notifications) from @steemitboard!**\n\n> Do you like **SteemitBoard**'s project? **[Vote for its witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1)** and **get one more award**!",
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      "body": "![Xamarin-logo1.png](https://cdn.steemitimages.com/DQmZYKbkkLTbwPQGV7JqjHsLBFT1V5SPi84vNAaJbg9Swvm/Xamarin-logo1.png)\n\n\n\ngithub project download link : https://github.com/elsedongusu/xamarin-app1\nmy github profile : https://github.com/elsedongusu\ngithub link : https://github.com/xamarin/Xamarin.Forms\n\n\n\n### What we will learn:\n-\tWhat is “MasterDetail Page” ?\n-\tWhy we should use?\n-\tBasic features and usage.\n\n### Requirements:\n\n- \tVisual Studio (I suggest Visiual Studio Mac) If you does not have you can download at there [https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F]\n###  What is “MasterDetail Page” ?\nWhether you are working on the web, desktop or working on mobile technology has become a necessity to develop user-focused applications. This becomes even more important in mobile environments. Such as windows, shortlists, fewer entrances, are a must for the mobile interface design. Guiding the user is one of those delicacies. Because of we can not display all the information on one screen, we group that information and direct the user to other screens. Here; them master detail page is a structure for directing users on the mobile application. We can easily say that in mobile applications the menu structure is masterdetail page structure. When you think about a menu structure, first you have a structure that contains menu elements, and when you click on these elements, another structure leads the user to an another page. In the MasterDetailPage structure, the menu structure (the container where our links are located) is called MasterPage, and the screen that we will link to when we click on the links is called DetailPage. In this case we can say that in a MasterDetailPage there are two screens, MasterPage and DetailPage.\n### \tWhy we should use?\nWe nearly always need menu structures in mobile applications. In such cases we need to use the MasterDetail Page.\n\nYou can see ‘what’s look like’ at the below.\n\n![gg.png](https://cdn.steemitimages.com/DQmZoHjhgrJbm2ar4xxMjGukf4xjax393LpGFUgmVYTcYhX/gg.png)\n\n\n\nYou can see the closed version of the menu in the first two pictures and in the last two pictures are the open version of the menu. \n\n### Let's look at how MasterDetailPage is now done.\nFirst of all, we talked about 2 structure of pages. MasterPage and Detail Page. Firstly, add these pages to a folder. It's possible to use even a simple ContentPage because of it is derived from the Page class or we can use a CarouselPage or a TabPage. \n\n# I am using ContentPage at there:\n\n```\n\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" \n             x:Class=\"Tutorial1.Views.MyMasterPage\" Title=\"My Master Page\">\n    <ContentPage.Content >\n        <StackLayout BackgroundColor=\"Teal\" >\n             <StackLayout HorizontalOptions=\"Center\" Margin=\"0,50\" >\n            <Label FontSize=\"24\" Text=\"Hello Master Page\"></Label>\n        </StackLayout>\n        </StackLayout>\n       \n    </ContentPage.Content>\n</ContentPage>\n```\n\nThe structure of my MasterPage consists of a ContentPage. I colored the backgrounds here especially to understand the work logic. This will be our Menu.\n\n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"Tutorial1.Views.MyDetailPage\">\n    <ContentPage.Content >\n        <StackLayout VerticalOptions=\"FillAndExpand\" BackgroundColor=\"Blue\">\n        <StackLayout HorizontalOptions=\"Center\" Margin=\"1,50\" >\n            <Label TextColor=\"White\" FontSize=\"24\" Text=\"Hello Detail Page\"></Label>\n        </StackLayout>\n            </StackLayout>\n    </ContentPage.Content>\n</ContentPage>\n```\n\nThese are our DetailPage. DetailPage is the page you get when you interact with the menü. Let us come to masterdetailpage. I mostly prefer to build it myself. So it's getting simpler codes. We create a class for this and we will derive this class from the MasterDetailPage class. \n\n```\n\nusing System;\nusing Tutorial1.Views;\nusing Xamarin.Forms;\n\nnamespace Tutorial1\n{\n    public class MasterDetailPage1 : MasterDetailPage\n    {\n        public MasterDetailPage1()\n        {\n            Master = new MyMasterPage();\n            Detail = new NavigationPage(new MyDetailPage());\n        }\n    }\n}\n\n```\nIt's so easy to create a MasterDetailPage, as you can see. What you need to be aware of here is that the Title property of the MasterPage is the require (you will get errors at runtime if you did not give an title to masterPage). Actually we see this title clearly on iOS screens. IOS uses it like a button. But on Android, it is a hamburger icon. If you want to see the hamburger icon on iOS, it will be enough to put the hamburger image on the MasterPage's Icon feature. You need to be aware that the relevant icon is located in the Resources folder. It is also included in the source code.\n\n### 1-\tMASTERDETAIL PAGE’S BASIC FEATURES AND USEAGES\nWe created a MasterDetailPage above. Now we will look at how to use this. As you can imagine, we will change the DetailPage of the MasterDetailPage with any item selected from the menu. To do this, I will add a few elements to the MasterPage that makes up our Menu, and change the DetailPage of our MasterDetailPage in their click event. First, we create a ContentPage named NewDetailPage to separate the old DetailPage and the new DetailPage. Then we access the existing MasterDetailPage in the click of the items that we put in the Menu as follows. \n\n```\nvar masterdetailPage = (MasterDetailPage)App.Current.MainPage;\n```\n\nThen  we make an assignation to Master and Detail properties of this MasterDetailPage as we would like. I do not want to change the Master page here. I am just changing the Detail page.\n\n```\n\nmasterdetailPage.Detail = new NavigationPage(new NewDetailPage());\n\n```\nYou will see here that we have a new problem now. The DetailPage has changed but the Menu is still in the open position. For close the menü we have an property; IsPresented. This property takes boolean values and allows the menu to be open when it is true and close when it is false. \n\n```\nmasterdetailPage.IsPresented = false;\n```\n\nOf course, it's totally in your hands to want to close the or  open Menu here. In this way, we can open the DetailPage with a simple click, and it is also possible to pass information to the DetailPage. For this we need to make a small edit in the DetailPage. Now, when we click on a button from the menu we want to do, we will move the text of this button to the new Detail page\n\n```\npublic partial class NewDetailPage : ContentPage\n    {\n        public NewDetailPage(string Content)\n        {\n            InitializeComponent();\n        }\n    }\n```\n\nWe changed the constructor of our NewDetailPage as above. Now let's edit the clicked event of the button in MasterPage\n\n```\npublic void btnClicked(object sender, EventArgs eventArgs)\n        {\n            var masterdetailPage = (MasterDetailPage)App.Current.MainPage;\n            var content = (Button)sender;\n            masterdetailPage.Detail = new NavigationPage(new NewDetailPage(content.Text));\n            masterdetailPage.IsPresented = false;\n\n        }\n```\n\nBecause of we call the parameterized constructor of NewDetailPage, we need to make the following change in our page. \n\n```\n\npublic partial class NewDetailPage : ContentPage\n    {\n        public NewDetailPage(string Content)\n        {\n            InitializeComponent();\n            lblContent.Text = \"Clicked Item Name:\" + Content;\n        }\n    }\n\nOn the XAML side;\n<ContentPage.Content>\n        <StackLayout HorizontalOptions=\"Center\" VerticalOptions=\"Center\">\n            <Label Text=\"Hello NEW DETAIL PAGE\"></Label>\n            <Label x:Name=\"lblContent\"></Label>\n        </StackLayout>\n    </ContentPage.Content>\n```\n\n# iOS looks like this;\n\n\n![uu.png](https://cdn.steemitimages.com/DQmPvRNSPb4VeY12EC8Etz2sXPXvUXy97Xa3sxVNFsVvCqt/uu.png)\n\nAs you can imagine, we can transfer a simple string of data here, as well as an object. For example, we will push the button we clicked on the DetailPage page. For this we modify the NewDetailPage constructor as follows;\n\n```public NewDetailPage(string Content, Button button)\n        {\n            InitializeComponent();\n            lblContent.Text = \"Clicked Item Name:\" + Content;\n            stkContainer.Children.Add(button);\n        }\n```\n\nIn the clicked event of our MasterPage, we make the following change;\n\n```\n\npublic void btnClicked(object sender, EventArgs eventArgs)\n        {\n            var masterdetailPage = (MasterDetailPage)App.Current.MainPage;\nvar content = (Button)sender;\n            masterdetailPage.Detail = new NavigationPage(new NewDetailPage(content.Text, content));\n            masterdetailPage.IsPresented = false;\n        }\n```\n \n![ll.png](https://cdn.steemitimages.com/DQmddNAsp3mVEjMF9W7kRm3MSKGzmvEi5Dd28z9pzbmBPCJ/ll.png)\n\nIt's just one of the many ways to transfer data, and perhaps the easiest one you see. Now let's put a different structure to our DetailPage than the ContentPage and see how we can group more data. I add a TabbedPage there. I will click on the second button in the menu to convert the DetailPage to a TabbedPage and start navigating through the tabs. First, create our TabbedPage\n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" \n             xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" \n             x:Class=\"Tutorial1.Views.TabPage1\" Title=\"Tab1\">\n    <ContentPage.Content>\n        <StackLayout HorizontalOptions=\"Center\" VerticalOptions=\"Center\">\n            <Label Text=\"Tab Page 1\"></Label>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage>\n\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" \n             xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" \n             x:Class=\"Tutorial1.Views.TabPage2\" Title=\"Tab2\">\n    <ContentPage.Content>\n        <StackLayout HorizontalOptions=\"Center\" VerticalOptions=\"Center\">\n            <Label Text=\"Tab Page 2\"></Label>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage>\n```\n\nNow, let's create a Page that we wrap our Tab Pages like a container. I prefer to do this with a class, but you can also create it yourself quickly from the Visual Studio theme gallery\n\n```\nusing System;\nusing Tutorial1.Views;\nusing Xamarin.Forms;\nnamespace Tutorial1\n{\n    public class MyTabbedPage : TabbedPage\n    {\n        public MyTabbedPage()\n        {\nChildren.Add(new TabPage1());\n            Children.Add(new TabPage2());\n        }\n    }\n}\n\nOn the second button in the MasterPage is in the clicked event;\n\npublic void btnTabbedClicked(object sender, EventArgs eventArgs)\n        {\n            var masterdetailPage = (MasterDetailPage)App.Current.MainPage;\n            masterdetailPage.Detail = new NavigationPage(new MyTabbedPage());\n            masterdetailPage.IsPresented = false;\n        }\n```\n# It will look like these pictures on Android and IOS.\n\n![şş.png](https://cdn.steemitimages.com/DQmTt87488S7rozUgtG6L5sXA41rc4Dq2neLcj7mpke8i6x/%C5%9F%C5%9F.png)\n\n### WHAT WE LEARNED\n1-\tWhat is MasterDetailPage? It is used for what purpose. What are the usage areas?\n2-\tThe elements that make up the MasterDetailPage structure and their use.\n\nAuthor: @elsedongusu\n\n[xamarin logo link](https://i2.wp.com/www.muratoner.net/wp-content/uploads/2016/04/Xamarin-logo1.png?resize=517%2C217)",
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      "body": "![Xamarin-logo1.png](https://steemitimages.com/DQmRArDUnvjft1omvtd69kYZs2V3xRLooh4vwGG37y14oLa/Xamarin-logo1.png)\n\n### Github Repository\nhttps://xamarin.com/forms\n\n### My github Adress\nhttps://github.com/elsedongusu\n\n### Github project file \nhttps://github.com/elsedongusu/xmarina\n\n\n\n\n\n### What we will learn:\n- Why we are using web api with mobelie applications? \n- How does web apis communicate with mobile systems? \n- Basic operations. Add, Edit, Delete, Display.\n\n### Requirements\n- [MsSql Server (optional, you can use mysql or oracle)](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)\n- [A web api ](https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api)\n- [ Visual Studio I will be using Visual Studio Mac for Mac but you can use any version which compatible with Xamarin](https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n### What you need to pay attention:\n\n- [Be sure you have Mvc Core 2.0.3](https://www.microsoft.com/net/download/macos)\n- [Be sure your Xamarin Components are running](https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n\n### Difficulty\n\n- Intermediate\n\n# Tutorial Contents\n\n Why we are using WEB API?\nWhen it is necessary to work with a global data in a web application, it is usually connecting to a database, and the data from that database is served to all clients. If there is no need for it here, it is the fastest way to connect directly to the database and to extract the data from there. In mobile technologies, it is not directly connected to a common database system like Mssql. Because you can not guarantee that mobile systems will always be connected to the internet.Instead of,  you can use a portable database systems such as Sqlite when it is not necessary to work with shared data. For collaborations, we have to use a layer (Web API, Web Service) works as a bridge between the database system and the mobile application. Most preferred one from these, is a  Web API.\n\nIf you are making a request to a Web API with WebClients in a desktop or web software and doing basic CRUD (Cread, Read, Update and Delete) operations here, the same techniques are used  at mobile applications to connect to the Web APIs and perform basic operations.\nFor a simple Web API that we will enter from our mobile application, create the database as follows.\n\n![er1.png](https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png)\n\nAfter that, lets code ouırWeb Apı's and be sure of its working. (I will be sharing my code)\n\n```\n[Route(\"api/[controller]\")]\n    public class StudentController : Controller\n    {\n        private readonly SchoolDBContext _context;\n        public StudentController(SchoolDBContext context)\n        {\n            _context = context;\n        }\n        // GET api/values\n        [HttpGet]\n        public IEnumerable<Student> Get()\n        {\n            return _context.Student.ToList();\n        }\n\n        // GET api/values/5\n        [HttpGet(\"{id}\")]\n\n\npublic Student Get(int id)\n        {\n            return _context.Student.FirstOrDefault(s => s.Id == id);\n        }\n\n        // POST api/values\n        [HttpPost]\n        public Student Post([FromBody]Student student)\n        {\n            _context.Student.Add(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // PUT api/values/5\n        [HttpPut(\"{id}\")]\n        public Student Put([FromBody]Student student)\n        {\n            _context.Student.Update(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // DELETE api/values/5\n        [HttpDelete(\"{id}\")]\n        public void Delete(int id)\n        {\n            var deleted = _context.Student.FirstOrDefault(s => s.Id == id);\n            _context.Student.Remove(deleted);\n\n        }\n\n    }\n```\nWe can code at Xamarin forms side now.\nFirstly we are creating an class at Models folder which one delegate our student class. So we can transfer datas to our student class, which one we got from web api\n\n```\nnamespace XamarinTutorial1WebApi.Models\n{\n\tpublic class Student\n\t{\n\t\tpublic int Id\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Name\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Surname\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic int Number\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Phone\n\t\t{\n\t\t\tget;\n\nset;\n\t\t}\n\t}\n}\n\n```\nWe are creating an screen for display student datas. We will be listing student datas are there and this screen will be a main page. We will can add a new student, edit student or delete student on this screen. \n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"XamarinTutorial1WebApi.StudentList\">\n    <ContentPage.Content>\n        <StackLayout Padding=\"20\">\n            <ListView x:Name=\"lstVStudent\">\n                <ListView.ItemTemplate>\n                    <DataTemplate>\n                        <ViewCell>\n                        <ViewCell.ContextActions>\n                                <MenuItem Clicked=\"MenuItemDetail_Clicked\" Text=\"Detail\" CommandParameter=\"{Binding .}\"></MenuItem>\n                                <MenuItem Clicked=\"MenuItemDelete_Clicked\" Text=\"Delete\" CommandParameter=\"{Binding .}\"></MenuItem>\n                            </ViewCell.ContextActions>\n                            <StackLayout BackgroundColor=\"Green\" Orientation=\"Vertical\">\n                                <StackLayout Orientation=\"Horizontal\">\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Name}\"></Label>\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Surname}\"></Label>\n                                   \n                                </StackLayout>\n                            </StackLayout>\n                        </ViewCell>\n                    </DataTemplate>\n                </ListView.ItemTemplate>\n            </ListView>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage> \nOur C # code will look like this:\nnamespace XamarinTutorial1WebApi\n{\n    public partial class StudentList : ContentPage\n    {\n        void MenuItemDetail_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student\n\n            if (student != null)\n            {\n                Navigation.PushModalAsync(new AddStudent(student));\n            }\n        }\n        async void MenuItemDelete_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student;\n            if (student != null)\n            {\n                var result = await DisplayAlert(\"Warning\", \"Are you sure?\", \"OK\", \"Cancel\");\n                if (result)\n                {\n                    await (new WebAPIService()).DeleteStudentAsync(student.Id);\n                }\n            }\n        }\n        public StudentList()\n        {\n            InitializeComponent();\n        }\n        protected override async void OnAppearing()\n        {\n            base.OnAppearing();\n\n            var result = await (new WebAPIService()).GetData();\n\n            lstVStudent.ItemsSource = result;\n        }\n\n\n    }\n}\n\n```\n\nOur intent is listing students data, edit and delete any student at this screen.  We will use MenuItems for this. \nAnd Menu Items look like this: \n\n![er3.png](https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png)\n\nBefore connecting a Web Api, we have to inject  libraries which one is neccesarry.  We will be using NewtonSoft JSON.NET because we generally use json structure at Rest services. Because of this don’t forget to add this library to your Project. Also we are inject Microsoft.Net.Http Library for using HttpClient class. \nAfter that we are creating our servicemanager, it will be a middleware for connect Web Api\n\n```\nusing System;\nusing System.Collections.Generic;\nusing System.Net.Http;\nusing System.Threading.Tasks;\nusing Newtonsoft.Json;\n\nnamespace XamarinTutorial1WebApi.Models\n{\n    public class WebAPIService\n    {\n        private HttpClient _client;\n        public WebAPIService()\n        {\n            _client = new HttpClient();\n        }\n        public async Task<List<Student>> GetData()\n        {\n            var uri = new Uri(@\"http://192.168.1.24/SchoolDBWebAPI/api/student\");\n            var items = new List<Student>();\n\n            var response = await _client.GetAsync(uri);\n            if (response.IsSuccessStatusCode)\n            {\n                var content = await response.Content.ReadAsStringAsync();\n                items = JsonConvert.DeserializeObject<List<Student>>(content);\n            }\n            return items;\n\n        }\n    }\n\n}\n\n```\nIn the section I pointed out above, it is important to note that the url is specified with an IP address when specifying it. Because if we specify localhost, we get Connection Refused error because the mobile emulator is referring to its own IP address and our Restful service is not working in the emulator. For this we need to use IIS instead of IIS Express on the computer where we run the Web API (it may be a virtual server).\n\nWe are desingning a screen for enter a student name, surname, school id and phone numberIf we want we can design another screen for this work but we did not design another screen because it wil have same components. \nThis is how our screen’s look like;\n\n![er5.png](https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png)\n\nFor delete operation, it is enought to send only student’s id. Our Rest service will delete entry which one is related with  this id. If we get a pre-approval for this, accidental clicks can not lead to data loss.\n\n![er7.png](https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png)\n\n[source link](https://i2.wp.com/www.muratoner.net/wp-content/uploads/2016/04/Xamarin-logo1.png?resize=720%2C302)\n\n### Author: elsedongusu",
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      "body": "![Xamarin-logo1.png](https://steemitimages.com/DQmRArDUnvjft1omvtd69kYZs2V3xRLooh4vwGG37y14oLa/Xamarin-logo1.png)\n\n### Github Repository\nhttps://xamarin.com/forms\n\n### My github Adress\nhttps://github.com/elsedongusu\n\n### Github project file \nhttps://github.com/elsedongusu/xmarina\n\n\n\n\n\n### What we will learn:\n- Why we are using web api with mobelie applications? \n- How does web apis communicate with mobile systems? \n- Basic operations. Add, Edit, Delete, Display.\n\n### Requirements\n- [MsSql Server (optional, you can use mysql or oracle)](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)\n- [A web api ](https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api)\n- [ Visual Studio I will be using Visual Studio Mac for Mac but you can use any version which compatible with Xamarin](https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n### What you need to pay attention:\n\n- [Be sure you have Mvc Core 2.0.3](https://www.microsoft.com/net/download/macos)\n- [Be sure your Xamarin Components are running](https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n\n### Difficulty\n\n- Intermediate\n\n# Tutorial Contents\n\n Why we are using WEB API?\nWhen it is necessary to work with a global data in a web application, it is usually connecting to a database, and the data from that database is served to all clients. If there is no need for it here, it is the fastest way to connect directly to the database and to extract the data from there. In mobile technologies, it is not directly connected to a common database system like Mssql. Because you can not guarantee that mobile systems will always be connected to the internet.Instead of,  you can use a portable database systems such as Sqlite when it is not necessary to work with shared data. For collaborations, we have to use a layer (Web API, Web Service) works as a bridge between the database system and the mobile application. Most preferred one from these, is a  Web API.\n\nIf you are making a request to a Web API with WebClients in a desktop or web software and doing basic CRUD (Cread, Read, Update and Delete) operations here, the same techniques are used  at mobile applications to connect to the Web APIs and perform basic operations.\nFor a simple Web API that we will enter from our mobile application, create the database as follows.\n\n![er1.png](https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png)\n\nAfter that, lets code ouırWeb Apı's and be sure of its working. (I will be sharing my code)\n\n```\n[Route(\"api/[controller]\")]\n    public class StudentController : Controller\n    {\n        private readonly SchoolDBContext _context;\n        public StudentController(SchoolDBContext context)\n        {\n            _context = context;\n        }\n        // GET api/values\n        [HttpGet]\n        public IEnumerable<Student> Get()\n        {\n            return _context.Student.ToList();\n        }\n\n        // GET api/values/5\n        [HttpGet(\"{id}\")]\n\n\npublic Student Get(int id)\n        {\n            return _context.Student.FirstOrDefault(s => s.Id == id);\n        }\n\n        // POST api/values\n        [HttpPost]\n        public Student Post([FromBody]Student student)\n        {\n            _context.Student.Add(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // PUT api/values/5\n        [HttpPut(\"{id}\")]\n        public Student Put([FromBody]Student student)\n        {\n            _context.Student.Update(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // DELETE api/values/5\n        [HttpDelete(\"{id}\")]\n        public void Delete(int id)\n        {\n            var deleted = _context.Student.FirstOrDefault(s => s.Id == id);\n            _context.Student.Remove(deleted);\n\n        }\n\n    }\n```\nWe can code at Xamarin forms side now.\nFirstly we are creating an class at Models folder which one delegate our student class. So we can transfer datas to our student class, which one we got from web api\n\n```\nnamespace XamarinTutorial1WebApi.Models\n{\n\tpublic class Student\n\t{\n\t\tpublic int Id\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Name\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Surname\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic int Number\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Phone\n\t\t{\n\t\t\tget;\n\nset;\n\t\t}\n\t}\n}\n\n```\nWe are creating an screen for display student datas. We will be listing student datas are there and this screen will be a main page. We will can add a new student, edit student or delete student on this screen. \n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"XamarinTutorial1WebApi.StudentList\">\n    <ContentPage.Content>\n        <StackLayout Padding=\"20\">\n            <ListView x:Name=\"lstVStudent\">\n                <ListView.ItemTemplate>\n                    <DataTemplate>\n                        <ViewCell>\n                        <ViewCell.ContextActions>\n                                <MenuItem Clicked=\"MenuItemDetail_Clicked\" Text=\"Detail\" CommandParameter=\"{Binding .}\"></MenuItem>\n                                <MenuItem Clicked=\"MenuItemDelete_Clicked\" Text=\"Delete\" CommandParameter=\"{Binding .}\"></MenuItem>\n                            </ViewCell.ContextActions>\n                            <StackLayout BackgroundColor=\"Green\" Orientation=\"Vertical\">\n                                <StackLayout Orientation=\"Horizontal\">\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Name}\"></Label>\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Surname}\"></Label>\n                                   \n                                </StackLayout>\n                            </StackLayout>\n                        </ViewCell>\n                    </DataTemplate>\n                </ListView.ItemTemplate>\n            </ListView>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage> \nOur C # code will look like this:\nnamespace XamarinTutorial1WebApi\n{\n    public partial class StudentList : ContentPage\n    {\n        void MenuItemDetail_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student\n\n            if (student != null)\n            {\n                Navigation.PushModalAsync(new AddStudent(student));\n            }\n        }\n        async void MenuItemDelete_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student;\n            if (student != null)\n            {\n                var result = await DisplayAlert(\"Warning\", \"Are you sure?\", \"OK\", \"Cancel\");\n                if (result)\n                {\n                    await (new WebAPIService()).DeleteStudentAsync(student.Id);\n                }\n            }\n        }\n        public StudentList()\n        {\n            InitializeComponent();\n        }\n        protected override async void OnAppearing()\n        {\n            base.OnAppearing();\n\n            var result = await (new WebAPIService()).GetData();\n\n            lstVStudent.ItemsSource = result;\n        }\n\n\n    }\n}\n\n```\n\nOur intent is listing students data, edit and delete any student at this screen.  We will use MenuItems for this. \nAnd Menu Items look like this: \n\n![er3.png](https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png)\n\nBefore connecting a Web Api, we have to inject  libraries which one is neccesarry.  We will be using NewtonSoft JSON.NET because we generally use json structure at Rest services. Because of this don’t forget to add this library to your Project. Also we are inject Microsoft.Net.Http Library for using HttpClient class. \nAfter that we are creating our servicemanager, it will be a middleware for connect Web Api\n\n```\nusing System;\nusing System.Collections.Generic;\nusing System.Net.Http;\nusing System.Threading.Tasks;\nusing Newtonsoft.Json;\n\nnamespace XamarinTutorial1WebApi.Models\n{\n    public class WebAPIService\n    {\n        private HttpClient _client;\n        public WebAPIService()\n        {\n            _client = new HttpClient();\n        }\n        public async Task<List<Student>> GetData()\n        {\n            var uri = new Uri(@\"http://192.168.1.24/SchoolDBWebAPI/api/student\");\n            var items = new List<Student>();\n\n            var response = await _client.GetAsync(uri);\n            if (response.IsSuccessStatusCode)\n            {\n                var content = await response.Content.ReadAsStringAsync();\n                items = JsonConvert.DeserializeObject<List<Student>>(content);\n            }\n            return items;\n\n        }\n    }\n\n}\n\n```\nIn the section I pointed out above, it is important to note that the url is specified with an IP address when specifying it. Because if we specify localhost, we get Connection Refused error because the mobile emulator is referring to its own IP address and our Restful service is not working in the emulator. For this we need to use IIS instead of IIS Express on the computer where we run the Web API (it may be a virtual server).\n\nWe are desingning a screen for enter a student name, surname, school id and phone numberIf we want we can design another screen for this work but we did not design another screen because it wil have same components. \nThis is how our screen’s look like;\n\n![er5.png](https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png)\n\nFor delete operation, it is enought to send only student’s id. Our Rest service will delete entry which one is related with  this id. If we get a pre-approval for this, accidental clicks can not lead to data loss.\n\n![er7.png](https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png)\n\n[source link](https://i2.wp.com/www.muratoner.net/wp-content/uploads/2016/04/Xamarin-logo1.png?resize=720%2C302)\n\n### Author: elsedongusu",
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      "body": "![Xamarin-logo1.png](https://steemitimages.com/DQmRArDUnvjft1omvtd69kYZs2V3xRLooh4vwGG37y14oLa/Xamarin-logo1.png)\n\n### Github Repository\nhttps://xamarin.com/forms\n\n### My github Adress\nhttps://github.com/elsedongusu\n\n### Github project file \nhttps://github.com/elsedongusu/xmarina\n\n\n\n\n\n### What we will learn:\n- Why we are using web api with mobelie applications? \n- How does web apis communicate with mobile systems? \n- Basic operations. Add, Edit, Delete, Display.\n\n### Requirements\n- [MsSql Server (optional, you can use mysql or oracle)](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)\n- [A web api ](https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api)\n- [ Visual Studio I will be using Visual Studio Mac for Mac but you can use any version which compatible with Xamarin](https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n### What you need to pay attention:\n\n- [Be sure you have Mvc Core 2.0.3](https://www.microsoft.com/net/download/macos)\n- [Be sure your Xamarin Components are running](https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n\n### Difficulty\n\n- Intermediate\n\n# Tutorial Contents\n\n Why we are using WEB API?\nWhen it is necessary to work with a global data in a web application, it is usually connecting to a database, and the data from that database is served to all clients. If there is no need for it here, it is the fastest way to connect directly to the database and to extract the data from there. In mobile technologies, it is not directly connected to a common database system like Mssql. Because you can not guarantee that mobile systems will always be connected to the internet.Instead of,  you can use a portable database systems such as Sqlite when it is not necessary to work with shared data. For collaborations, we have to use a layer (Web API, Web Service) works as a bridge between the database system and the mobile application. Most preferred one from these, is a  Web API.\n\nIf you are making a request to a Web API with WebClients in a desktop or web software and doing basic CRUD (Cread, Read, Update and Delete) operations here, the same techniques are used  at mobile applications to connect to the Web APIs and perform basic operations.\nFor a simple Web API that we will enter from our mobile application, create the database as follows.\n\n![er1.png](https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png)\n\nAfter that, lets code ouırWeb Apı's and be sure of its working. (I will be sharing my code)\n\n```\n[Route(\"api/[controller]\")]\n    public class StudentController : Controller\n    {\n        private readonly SchoolDBContext _context;\n        public StudentController(SchoolDBContext context)\n        {\n            _context = context;\n        }\n        // GET api/values\n        [HttpGet]\n        public IEnumerable<Student> Get()\n        {\n            return _context.Student.ToList();\n        }\n\n        // GET api/values/5\n        [HttpGet(\"{id}\")]\n\n\npublic Student Get(int id)\n        {\n            return _context.Student.FirstOrDefault(s => s.Id == id);\n        }\n\n        // POST api/values\n        [HttpPost]\n        public Student Post([FromBody]Student student)\n        {\n            _context.Student.Add(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // PUT api/values/5\n        [HttpPut(\"{id}\")]\n        public Student Put([FromBody]Student student)\n        {\n            _context.Student.Update(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // DELETE api/values/5\n        [HttpDelete(\"{id}\")]\n        public void Delete(int id)\n        {\n            var deleted = _context.Student.FirstOrDefault(s => s.Id == id);\n            _context.Student.Remove(deleted);\n\n        }\n\n    }\n```\nWe can code at Xamarin forms side now.\nFirstly we are creating an class at Models folder which one delegate our student class. So we can transfer datas to our student class, which one we got from web api\n\n```\nnamespace XamarinTutorial1WebApi.Models\n{\n\tpublic class Student\n\t{\n\t\tpublic int Id\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Name\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Surname\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic int Number\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Phone\n\t\t{\n\t\t\tget;\n\nset;\n\t\t}\n\t}\n}\n\n```\nWe are creating an screen for display student datas. We will be listing student datas are there and this screen will be a main page. We will can add a new student, edit student or delete student on this screen. \n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"XamarinTutorial1WebApi.StudentList\">\n    <ContentPage.Content>\n        <StackLayout Padding=\"20\">\n            <ListView x:Name=\"lstVStudent\">\n                <ListView.ItemTemplate>\n                    <DataTemplate>\n                        <ViewCell>\n                        <ViewCell.ContextActions>\n                                <MenuItem Clicked=\"MenuItemDetail_Clicked\" Text=\"Detail\" CommandParameter=\"{Binding .}\"></MenuItem>\n                                <MenuItem Clicked=\"MenuItemDelete_Clicked\" Text=\"Delete\" CommandParameter=\"{Binding .}\"></MenuItem>\n                            </ViewCell.ContextActions>\n                            <StackLayout BackgroundColor=\"Green\" Orientation=\"Vertical\">\n                                <StackLayout Orientation=\"Horizontal\">\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Name}\"></Label>\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Surname}\"></Label>\n                                   \n                                </StackLayout>\n                            </StackLayout>\n                        </ViewCell>\n                    </DataTemplate>\n                </ListView.ItemTemplate>\n            </ListView>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage> \nOur C # code will look like this:\nnamespace XamarinTutorial1WebApi\n{\n    public partial class StudentList : ContentPage\n    {\n        void MenuItemDetail_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student\n\n            if (student != null)\n            {\n                Navigation.PushModalAsync(new AddStudent(student));\n            }\n        }\n        async void MenuItemDelete_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student;\n            if (student != null)\n            {\n                var result = await DisplayAlert(\"Warning\", \"Are you sure?\", \"OK\", \"Cancel\");\n                if (result)\n                {\n                    await (new WebAPIService()).DeleteStudentAsync(student.Id);\n                }\n            }\n        }\n        public StudentList()\n        {\n            InitializeComponent();\n        }\n        protected override async void OnAppearing()\n        {\n            base.OnAppearing();\n\n            var result = await (new WebAPIService()).GetData();\n\n            lstVStudent.ItemsSource = result;\n        }\n\n\n    }\n}\n\n```\n\nOur intent is listing students data, edit and delete any student at this screen.  We will use MenuItems for this. \nAnd Menu Items look like this: \n\n![er3.png](https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png)\n\nBefore connecting a Web Api, we have to inject  libraries which one is neccesarry.  We will be using NewtonSoft JSON.NET because we generally use json structure at Rest services. Because of this don’t forget to add this library to your Project. Also we are inject Microsoft.Net.Http Library for using HttpClient class. \nAfter that we are creating our servicemanager, it will be a middleware for connect Web Api\n\n```\nusing System;\nusing System.Collections.Generic;\nusing System.Net.Http;\nusing System.Threading.Tasks;\nusing Newtonsoft.Json;\n\nnamespace XamarinTutorial1WebApi.Models\n{\n    public class WebAPIService\n    {\n        private HttpClient _client;\n        public WebAPIService()\n        {\n            _client = new HttpClient();\n        }\n        public async Task<List<Student>> GetData()\n        {\n            var uri = new Uri(@\"http://192.168.1.24/SchoolDBWebAPI/api/student\");\n            var items = new List<Student>();\n\n            var response = await _client.GetAsync(uri);\n            if (response.IsSuccessStatusCode)\n            {\n                var content = await response.Content.ReadAsStringAsync();\n                items = JsonConvert.DeserializeObject<List<Student>>(content);\n            }\n            return items;\n\n        }\n    }\n\n}\n\n```\nIn the section I pointed out above, it is important to note that the url is specified with an IP address when specifying it. Because if we specify localhost, we get Connection Refused error because the mobile emulator is referring to its own IP address and our Restful service is not working in the emulator. For this we need to use IIS instead of IIS Express on the computer where we run the Web API (it may be a virtual server).\n\nWe are desingning a screen for enter a student name, surname, school id and phone numberIf we want we can design another screen for this work but we did not design another screen because it wil have same components. \nThis is how our screen’s look like;\n\n![er5.png](https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png)\n\nFor delete operation, it is enought to send only student’s id. Our Rest service will delete entry which one is related with  this id. If we get a pre-approval for this, accidental clicks can not lead to data loss.\n\n![er7.png](https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png)\n\n[source link](https://i2.wp.com/www.muratoner.net/wp-content/uploads/2016/04/Xamarin-logo1.png?resize=720%2C302)\n\n### Author: elsedongusu",
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      "body": "![btcplogo.jpg](https://steemitimages.com/DQmZErFyFEDVWMBW5q4MFxb21cK6twEAjU6dBEjyANxheS2/btcplogo.jpg)\nselam arkadaslar \nbitcoin de bildiğiniz üzere son zamanlarda bayağı bir çatallanmalar yapıldı ve bitcoinimizin yeni yeni çocukları oldu\nişte bunlardan birisi olan btcp yani bitcoin private için dört gözle bekleyenlerden birisiyim \nve etc ile zclasiic birleşimi olan bu coin inancım oki çok yakında moneronun tahtına oturacaktır benim naçizhane tavsiyem bu coini dikkatli bir şekilde izleminiz ve sizlere sunduğu fırsatları kaçırmamanız \ne tabikide bu bir yatırım tavsiyesi değildir sadece içimi döktim sizlere\n\n[foto link](https://i2.wp.com/kriptoparahaber.com/wp-content/uploads/2018/05/oie_Ql8gb5IBmO48.jpg?resize=758%2C558&ssl=1)",
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      "body": "![btcplogo.jpg](https://steemitimages.com/DQmZErFyFEDVWMBW5q4MFxb21cK6twEAjU6dBEjyANxheS2/btcplogo.jpg)\nselam arkadaslar \nbitcoin de bildiğiniz üzere son zamanlarda bayağı bir çatallanmalar yapıldı ve bitcoinimizin yeni yeni çocukları oldu\nişte bunlardan birisi olan btcp yani bitcoin private için dört gözle bekleyenlerden birisiyim \nve etc ile zclasiic birleşimi olan bu coin inancım oki çok yakında moneronun tahtına oturacaktır benim naçizhane tavsiyem bu coini dikkatli bir şekilde izleminiz ve sizlere sunduğu fırsatları kaçırmamanız \ne tabikide bu bir yatırım tavsiyesi değildir sadece içimi döktim sizlere\n\n[foto link](https://i2.wp.com/kriptoparahaber.com/wp-content/uploads/2018/05/oie_Ql8gb5IBmO48.jpg?resize=758%2C558&ssl=1)",
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      "body": "<blockquote>Yatırım tavsiyesi için teşekkürler :D</blockquote>\nArada böyle içiniz dökün.Takipteyim hocam",
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      "body": "canım sıkl",
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      "body": "![electronn.png](https://steemitimages.com/DQma3Y1W2wHM8FkMN9k6b6FxUTwTm5srU1Y2myfJagoyjNR/electronn.png)\n### Github repository\n\nhttps://github.com/electron/electron\n\n### My Github Adress\n\nhttps://github.com/sanalrakam\n\n### Project Github Adress\n\nhttps://github.com/sanalrakam/Application-Menu-in-Electron\n\n\n\n### What I will learn?\n- You will learn what is the menu module in electron\n- You will learn differences between application menu and context menu\n- You will learn how to create template for menu\n- You will learn how to create sub menu\n- You will learn what kind of menu role in electron\n### Requirements\n\nAtom Editor:https://atom.io/\nElectron: https://electronjs.org/\nNpm: https://www.npmjs.com/\n\n### Difficulty\n- Intermediate\n### Description\nThere are two kinds of menus in electron\nFirst menu is the application menu and is located on the bar above the application\nThe second menu is the context menu right click on Mouse to open this menu\nIn this tutorial will tell the application menu. How to create and use an application menu\nTo create an application menu, you first need a menu module we define this module from electron\nSecondly we need a template to define menus and submenus. Template structure must be in json structure\nFinally we need to make this template menu and define it in he menu \nLet me demonstrate what I’m saying with an example\nWwe define the app and browser window modules to create an electron application and let define the menu module side them\n```\nconst {app,BrowserWindow,Menu}=require('electron')\n\n```\n![r1.jpg](https://steemitimages.com/DQmTsLMuiWaasduTudfxDy8AtzEpin35GqVW83x8LHG4GZ8/r1.jpg)\nDefine url and path variables\n\n```\nconst url=require('url')\n const path=require('path')\n```\n\n\n![r2.jpg](https://steemitimages.com/DQmRiuTQYUJB87Nkv5vDNfH8enj8pN2KcTtC68sWYYfjD6G/r2.jpg)\nCreate a function to create window\n\n```\nlet win;\nfunction crtWindow(){\nwin=new BrowserWindow({\nwidth:800,\nheight:600\n1)\nwin.loadURL(url.format({\npathname:path.join( dirname,'index.htm11),\nprotocol:'file:',\nslashes:true\n} ) )\n}\n```\n\n![rr3.jpg](https://steemitimages.com/DQmWgvyBhzL9vAsFMaFA3RxycuSrQZjQRdLBdbzWF9R5Vrt/rr3.jpg)\nWe can adjust window sizes with BrowserWindow\nWe define the window page to be displayed with the loadURL method \nFinally we define this function in the on methods of the app module\n\n```\napp.on('ready',crtWindow)\n```\n\n![rr4.jpg](https://steemitimages.com/DQmeaddLJZ2t7ZdQrHy5BSS3RvmbkCf4jdVGMN4WwFHVrqB/rr4.jpg)\nOur electron application is ready\nOpens by default with electron appliation menus\nWhen we create a custom menu we overwrite these created menus\nLet’s create a template for menu\n\n```\nconst template=[\n{\nlabel:'sanalrakam',\n\n```\n![rr5.jpg](https://steemitimages.com/DQmc7AWRotJWBwq65pUD5tQLvULBp7nXhdy7YJLas6cRhmw/rr5.jpg)\nI have identified the top menu here label property string gets a value\nSub menu property used to create sub menu\n\n\n![rr6.jpg](https://steemitimages.com/DQmdzEFAQf2HEpQaoqicNvr4yM8cqYVfwpYWy28arphx2KZ/rr6.jpg)\nAllows the execution of the value that comes againist the role property\nRole property can only take roles from the electron\nThe window will be minimized if you click the minimize menu\nSet role property minimize and let’s see how\nTemplate is ready. Let’s do this template menu and set menus fort he application\n\n```\nconst menu=Menu.buildFromTemplate(template)\n Menu. setApplicationMenu(menu)\n```\n![rr7.jpg](https://steemitimages.com/DQmYXs7VJUtAu5ebzg7z9kR5JY13FjdDCc2Q8ey1CiCKcBT/rr7.jpg)\nContinue to create sub menus\n```\nrole: 'redo'\ntype: ' separator '\nrole: ' cut '\nrole: 'copy'\nrole: ' paste \n\n```\n\n![rr8.jpg](https://steemitimages.com/DQmc7FMgaQ6ZcZome1aZfg3Tnx2PL9v7PEeE38DaM5zSV1z/rr8.jpg)\nI wrote a new menu type is type and set it as a separator so that I can separate the upper and lower menus\nIhave set the submenus of an upper menu in order to set a new upper menu\n\n```\nrole:'help',\nsubmenu:[\n{\nlabel:'for \n```\n![rr9.jpg](https://steemitimages.com/DQmamAwKyPT7j5HRVm2oVFg1ToZnVu1fC2s4W5kCfcswjkg/rr9.jpg)\nYou can create your own application menus using these examples\n\n### index.html\n```\n<!DOCTYPE html>\n<html>\n   <head>\n      <meta charset = \"UTF-8\">\n      <title>Menus</title>\n   </head>\n\n   <body>\n\n   </body>\n</html>\n\n```\n### main.js\n\n```\nconst {app,BrowserWindow,Menu}=require('electron')\nconst url=require('url')\nconst path=require('path')\n\nlet win;\n\nfunction crtWindow(){\n\n  win=new BrowserWindow({\n    width:800,\n    height:600\n  })\n\n  win.loadURL(url.format({\n    pathname:path.join(__dirname,'index.html'),\n    protocol:'file:',\n    slashes:true\n  }))\n}\n\nconst template=[\n  {\n    label:'sanalrakam',\n    submenu:[\n      {\n        role:'minimize'\n      },\n      {\n        role:'redo'\n      },\n      {\n        type:'separator'\n      },\n      {\n        role:'cut'\n      },\n      {\n        role:'copy'\n      },\n      {\n        role:'paste'\n      }\n    ]\n  },\n  {\n    role:'help',\n    submenu:[\n      {\n        label:'for help'\n      }\n    ]\n  }\n]\n\nconst menu=Menu.buildFromTemplate(template)\nMenu.setApplicationMenu(menu)\n\n\n\napp.on('ready',crtWindow)\n```\n### package.json\n\n```\n{\n  \"name\": \"Menus\",\n  \"version\": \"1.0.0\",\n  \"description\": \"\",\n  \"main\": \"main.js\",\n  \"scripts\": {\n    \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n  },\n  \"author\": \"\",\n  \"license\": \"ISC\"\n}\n```\n### Video Tutorial\n\nhttps://www.youtube.com/watch?v=bsTTeR0FNW4&feature=youtu.be\n\n### Curriculum\n\n[Show Open Dialog in Electron](https://steemit.com/utopian-io/@sanalrakam/show-open-dialog-in-electron)\n[IPC in Electron Tutorial](https://steemit.com/utopian-io/@sanalrakam/ipc-in-electron-tutorial)\n[The Remaining Character Calculation Application in the electron](https://steemit.com/utopian-io/@sanalrakam/the-remaining-character-calculation-application-in-the-electron)\n\n[electron logo link](https://avatars1.githubusercontent.com/u/13409222?s=400&v=4)",
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      "body": "![Xamarin-logo1.png](https://steemitimages.com/DQmRArDUnvjft1omvtd69kYZs2V3xRLooh4vwGG37y14oLa/Xamarin-logo1.png)\n\n### Github Repository\nhttps://xamarin.com/forms\n\n### My github Adress\nhttps://github.com/elsedongusu\n\n### Github project file \nhttps://github.com/elsedongusu/xmarina\n\n\n\n\n\n### What we will learn:\n- Why we are using web api with mobelie applications? \n- How does web apis communicate with mobile systems? \n- Basic operations. Add, Edit, Delete, Display.\n\n### Requirements\n- [MsSql Server (optional, you can use mysql or oracle)](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)\n- [A web api ](https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api)\n- [ Visual Studio I will be using Visual Studio Mac for Mac but you can use any version which compatible with Xamarin](https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n### What you need to pay attention:\n\n- [Be sure you have Mvc Core 2.0.3](https://www.microsoft.com/net/download/macos)\n- [Be sure your Xamarin Components are running](https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n\n### Difficulty\n\n- Intermediate\n\n# Tutorial Contents\n\n Why we are using WEB API?\nWhen it is necessary to work with a global data in a web application, it is usually connecting to a database, and the data from that database is served to all clients. If there is no need for it here, it is the fastest way to connect directly to the database and to extract the data from there. In mobile technologies, it is not directly connected to a common database system like Mssql. Because you can not guarantee that mobile systems will always be connected to the internet.Instead of,  you can use a portable database systems such as Sqlite when it is not necessary to work with shared data. For collaborations, we have to use a layer (Web API, Web Service) works as a bridge between the database system and the mobile application. Most preferred one from these, is a  Web API.\n\nIf you are making a request to a Web API with WebClients in a desktop or web software and doing basic CRUD (Cread, Read, Update and Delete) operations here, the same techniques are used  at mobile applications to connect to the Web APIs and perform basic operations.\nFor a simple Web API that we will enter from our mobile application, create the database as follows.\n\n![er1.png](https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png)\n\nAfter that, lets code ouırWeb Apı's and be sure of its working. (I will be sharing my code)\n\n```\n[Route(\"api/[controller]\")]\n    public class StudentController : Controller\n    {\n        private readonly SchoolDBContext _context;\n        public StudentController(SchoolDBContext context)\n        {\n            _context = context;\n        }\n        // GET api/values\n        [HttpGet]\n        public IEnumerable<Student> Get()\n        {\n            return _context.Student.ToList();\n        }\n\n        // GET api/values/5\n        [HttpGet(\"{id}\")]\n\n\npublic Student Get(int id)\n        {\n            return _context.Student.FirstOrDefault(s => s.Id == id);\n        }\n\n        // POST api/values\n        [HttpPost]\n        public Student Post([FromBody]Student student)\n        {\n            _context.Student.Add(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // PUT api/values/5\n        [HttpPut(\"{id}\")]\n        public Student Put([FromBody]Student student)\n        {\n            _context.Student.Update(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // DELETE api/values/5\n        [HttpDelete(\"{id}\")]\n        public void Delete(int id)\n        {\n            var deleted = _context.Student.FirstOrDefault(s => s.Id == id);\n            _context.Student.Remove(deleted);\n\n        }\n\n    }\n```\nWe can code at Xamarin forms side now.\nFirstly we are creating an class at Models folder which one delegate our student class. So we can transfer datas to our student class, which one we got from web api\n\n```\nnamespace XamarinTutorial1WebApi.Models\n{\n\tpublic class Student\n\t{\n\t\tpublic int Id\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Name\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Surname\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic int Number\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Phone\n\t\t{\n\t\t\tget;\n\nset;\n\t\t}\n\t}\n}\n\n```\nWe are creating an screen for display student datas. We will be listing student datas are there and this screen will be a main page. We will can add a new student, edit student or delete student on this screen. \n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"XamarinTutorial1WebApi.StudentList\">\n    <ContentPage.Content>\n        <StackLayout Padding=\"20\">\n            <ListView x:Name=\"lstVStudent\">\n                <ListView.ItemTemplate>\n                    <DataTemplate>\n                        <ViewCell>\n                        <ViewCell.ContextActions>\n                                <MenuItem Clicked=\"MenuItemDetail_Clicked\" Text=\"Detail\" CommandParameter=\"{Binding .}\"></MenuItem>\n                                <MenuItem Clicked=\"MenuItemDelete_Clicked\" Text=\"Delete\" CommandParameter=\"{Binding .}\"></MenuItem>\n                            </ViewCell.ContextActions>\n                            <StackLayout BackgroundColor=\"Green\" Orientation=\"Vertical\">\n                                <StackLayout Orientation=\"Horizontal\">\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Name}\"></Label>\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Surname}\"></Label>\n                                   \n                                </StackLayout>\n                            </StackLayout>\n                        </ViewCell>\n                    </DataTemplate>\n                </ListView.ItemTemplate>\n            </ListView>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage> \nOur C # code will look like this:\nnamespace XamarinTutorial1WebApi\n{\n    public partial class StudentList : ContentPage\n    {\n        void MenuItemDetail_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student\n\n            if (student != null)\n            {\n                Navigation.PushModalAsync(new AddStudent(student));\n            }\n        }\n        async void MenuItemDelete_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student;\n            if (student != null)\n            {\n                var result = await DisplayAlert(\"Warning\", \"Are you sure?\", \"OK\", \"Cancel\");\n                if (result)\n                {\n                    await (new WebAPIService()).DeleteStudentAsync(student.Id);\n                }\n            }\n        }\n        public StudentList()\n        {\n            InitializeComponent();\n        }\n        protected override async void OnAppearing()\n        {\n            base.OnAppearing();\n\n            var result = await (new WebAPIService()).GetData();\n\n            lstVStudent.ItemsSource = result;\n        }\n\n\n    }\n}\n\n```\n\nOur intent is listing students data, edit and delete any student at this screen.  We will use MenuItems for this. \nAnd Menu Items look like this: \n\n![er3.png](https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png)\n\nBefore connecting a Web Api, we have to inject  libraries which one is neccesarry.  We will be using NewtonSoft JSON.NET because we generally use json structure at Rest services. Because of this don’t forget to add this library to your Project. Also we are inject Microsoft.Net.Http Library for using HttpClient class. \nAfter that we are creating our servicemanager, it will be a middleware for connect Web Api\n\n```\nusing System;\nusing System.Collections.Generic;\nusing System.Net.Http;\nusing System.Threading.Tasks;\nusing Newtonsoft.Json;\n\nnamespace XamarinTutorial1WebApi.Models\n{\n    public class WebAPIService\n    {\n        private HttpClient _client;\n        public WebAPIService()\n        {\n            _client = new HttpClient();\n        }\n        public async Task<List<Student>> GetData()\n        {\n            var uri = new Uri(@\"http://192.168.1.24/SchoolDBWebAPI/api/student\");\n            var items = new List<Student>();\n\n            var response = await _client.GetAsync(uri);\n            if (response.IsSuccessStatusCode)\n            {\n                var content = await response.Content.ReadAsStringAsync();\n                items = JsonConvert.DeserializeObject<List<Student>>(content);\n            }\n            return items;\n\n        }\n    }\n\n}\n\n```\nIn the section I pointed out above, it is important to note that the url is specified with an IP address when specifying it. Because if we specify localhost, we get Connection Refused error because the mobile emulator is referring to its own IP address and our Restful service is not working in the emulator. For this we need to use IIS instead of IIS Express on the computer where we run the Web API (it may be a virtual server).\n\nWe are desingning a screen for enter a student name, surname, school id and phone numberIf we want we can design another screen for this work but we did not design another screen because it wil have same components. \nThis is how our screen’s look like;\n\n![er5.png](https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png)\n\nFor delete operation, it is enought to send only student’s id. Our Rest service will delete entry which one is related with  this id. If we get a pre-approval for this, accidental clicks can not lead to data loss.\n\n![er7.png](https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png)\n\n[source link](https://i2.wp.com/www.muratoner.net/wp-content/uploads/2016/04/Xamarin-logo1.png?resize=720%2C302)\n\n### Author: elsedongusu",
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      "body": "### Github Repository\nhttps://xamarin.com/forms\n\n### My github Adress\nhttps://github.com/elsedongusu\n\n### Github project file \nhttps://github.com/elsedongusu/xmarina\n\n\n\n\n\n### What we will learn:\n- Why we are using web api with mobelie applications? \n- How does web apis communicate with mobile systems? \n- Basic operations. Add, Edit, Delete, Display.\n\n### Requirements\n- [MsSql Server (optional, you can use mysql or oracle)](https://www.microsoft.com/en-us/sql-server/sql-server-downloads)\n- [A web api ](https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api)\n- [ Visual Studio I will be using Visual Studio Mac for Mac but you can use any version which compatible with Xamarin](https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n### What you need to pay attention:\n\n- [Be sure you have Mvc Core 2.0.3](https://www.microsoft.com/net/download/macos)\n- [Be sure your Xamarin Components are running](https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F)\n\n\n### Difficulty\n\n- Intermediate\n\n# Tutorial Contents\n\n Why we are using WEB API?\nWhen it is necessary to work with a global data in a web application, it is usually connecting to a database, and the data from that database is served to all clients. If there is no need for it here, it is the fastest way to connect directly to the database and to extract the data from there. In mobile technologies, it is not directly connected to a common database system like Mssql. Because you can not guarantee that mobile systems will always be connected to the internet.Instead of,  you can use a portable database systems such as Sqlite when it is not necessary to work with shared data. For collaborations, we have to use a layer (Web API, Web Service) works as a bridge between the database system and the mobile application. Most preferred one from these, is a  Web API.\n\nIf you are making a request to a Web API with WebClients in a desktop or web software and doing basic CRUD (Cread, Read, Update and Delete) operations here, the same techniques are used  at mobile applications to connect to the Web APIs and perform basic operations.\nFor a simple Web API that we will enter from our mobile application, create the database as follows.\n\n![er1.png](https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png)\n\nAfter that, lets code ouırWeb Apı's and be sure of its working. (I will be sharing my code)\n\n```\n[Route(\"api/[controller]\")]\n    public class StudentController : Controller\n    {\n        private readonly SchoolDBContext _context;\n        public StudentController(SchoolDBContext context)\n        {\n            _context = context;\n        }\n        // GET api/values\n        [HttpGet]\n        public IEnumerable<Student> Get()\n        {\n            return _context.Student.ToList();\n        }\n\n        // GET api/values/5\n        [HttpGet(\"{id}\")]\n\n\npublic Student Get(int id)\n        {\n            return _context.Student.FirstOrDefault(s => s.Id == id);\n        }\n\n        // POST api/values\n        [HttpPost]\n        public Student Post([FromBody]Student student)\n        {\n            _context.Student.Add(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // PUT api/values/5\n        [HttpPut(\"{id}\")]\n        public Student Put([FromBody]Student student)\n        {\n            _context.Student.Update(student);\n            _context.SaveChanges();\n            return student;\n        }\n\n        // DELETE api/values/5\n        [HttpDelete(\"{id}\")]\n        public void Delete(int id)\n        {\n            var deleted = _context.Student.FirstOrDefault(s => s.Id == id);\n            _context.Student.Remove(deleted);\n\n        }\n\n    }\n```\nWe can code at Xamarin forms side now.\nFirstly we are creating an class at Models folder which one delegate our student class. So we can transfer datas to our student class, which one we got from web api\n\n```\nnamespace XamarinTutorial1WebApi.Models\n{\n\tpublic class Student\n\t{\n\t\tpublic int Id\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Name\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Surname\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic int Number\n\t\t{\n\t\t\tget;\n\t\t\tset;\n\t\t}\n\t\tpublic string Phone\n\t\t{\n\t\t\tget;\n\nset;\n\t\t}\n\t}\n}\n\n```\nWe are creating an screen for display student datas. We will be listing student datas are there and this screen will be a main page. We will can add a new student, edit student or delete student on this screen. \n\n```\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ContentPage xmlns=\"http://xamarin.com/schemas/2014/forms\" xmlns:x=\"http://schemas.microsoft.com/winfx/2009/xaml\" x:Class=\"XamarinTutorial1WebApi.StudentList\">\n    <ContentPage.Content>\n        <StackLayout Padding=\"20\">\n            <ListView x:Name=\"lstVStudent\">\n                <ListView.ItemTemplate>\n                    <DataTemplate>\n                        <ViewCell>\n                        <ViewCell.ContextActions>\n                                <MenuItem Clicked=\"MenuItemDetail_Clicked\" Text=\"Detail\" CommandParameter=\"{Binding .}\"></MenuItem>\n                                <MenuItem Clicked=\"MenuItemDelete_Clicked\" Text=\"Delete\" CommandParameter=\"{Binding .}\"></MenuItem>\n                            </ViewCell.ContextActions>\n                            <StackLayout BackgroundColor=\"Green\" Orientation=\"Vertical\">\n                                <StackLayout Orientation=\"Horizontal\">\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Name}\"></Label>\n                                    <Label TextColor=\"White\" FontSize=\"20\" Text=\"{Binding Surname}\"></Label>\n                                   \n                                </StackLayout>\n                            </StackLayout>\n                        </ViewCell>\n                    </DataTemplate>\n                </ListView.ItemTemplate>\n            </ListView>\n        </StackLayout>\n    </ContentPage.Content>\n</ContentPage> \nOur C # code will look like this:\nnamespace XamarinTutorial1WebApi\n{\n    public partial class StudentList : ContentPage\n    {\n        void MenuItemDetail_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student\n\n            if (student != null)\n            {\n                Navigation.PushModalAsync(new AddStudent(student));\n            }\n        }\n        async void MenuItemDelete_Clicked(object sender, EventArgs eventArgs)\n        {\n            var student = ((MenuItem)sender).CommandParameter as Student;\n            if (student != null)\n            {\n                var result = await DisplayAlert(\"Warning\", \"Are you sure?\", \"OK\", \"Cancel\");\n                if (result)\n                {\n                    await (new WebAPIService()).DeleteStudentAsync(student.Id);\n                }\n            }\n        }\n        public StudentList()\n        {\n            InitializeComponent();\n        }\n        protected override async void OnAppearing()\n        {\n            base.OnAppearing();\n\n            var result = await (new WebAPIService()).GetData();\n\n            lstVStudent.ItemsSource = result;\n        }\n\n\n    }\n}\n\n```\n\nOur intent is listing students data, edit and delete any student at this screen.  We will use MenuItems for this. \nAnd Menu Items look like this: \n\n![er3.png](https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png)\n\nBefore connecting a Web Api, we have to inject  libraries which one is neccesarry.  We will be using NewtonSoft JSON.NET because we generally use json structure at Rest services. Because of this don’t forget to add this library to your Project. Also we are inject Microsoft.Net.Http Library for using HttpClient class. \nAfter that we are creating our servicemanager, it will be a middleware for connect Web Api\n\n```\nusing System;\nusing System.Collections.Generic;\nusing System.Net.Http;\nusing System.Threading.Tasks;\nusing Newtonsoft.Json;\n\nnamespace XamarinTutorial1WebApi.Models\n{\n    public class WebAPIService\n    {\n        private HttpClient _client;\n        public WebAPIService()\n        {\n            _client = new HttpClient();\n        }\n        public async Task<List<Student>> GetData()\n        {\n            var uri = new Uri(@\"http://192.168.1.24/SchoolDBWebAPI/api/student\");\n            var items = new List<Student>();\n\n            var response = await _client.GetAsync(uri);\n            if (response.IsSuccessStatusCode)\n            {\n                var content = await response.Content.ReadAsStringAsync();\n                items = JsonConvert.DeserializeObject<List<Student>>(content);\n            }\n            return items;\n\n        }\n    }\n\n}\n\n```\nIn the section I pointed out above, it is important to note that the url is specified with an IP address when specifying it. Because if we specify localhost, we get Connection Refused error because the mobile emulator is referring to its own IP address and our Restful service is not working in the emulator. For this we need to use IIS instead of IIS Express on the computer where we run the Web API (it may be a virtual server).\n\nWe are desingning a screen for enter a student name, surname, school id and phone numberIf we want we can design another screen for this work but we did not design another screen because it wil have same components. \nThis is how our screen’s look like;\n\n![er5.png](https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png)\n\nFor delete operation, it is enought to send only student’s id. Our Rest service will delete entry which one is related with  this id. If we get a pre-approval for this, accidental clicks can not lead to data loss.\n\n![er7.png](https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png)\n\n### Author: elsedongusu",
      "json_metadata": "{\"tags\":[\"utopian-io\",\"xamarin\",\"tutorial\",\"technology\",\"education\"],\"image\":[\"https://steemitimages.com/DQmXP319cW3T8gRKFyvvk2m4RtVYJCtj7XbAkTeZSmCyhGK/er1.png\",\"https://steemitimages.com/DQmcMz2oEVsyZtpxaUXF4o5gZbstUsPBnxigCijdpsedML7/er3.png\",\"https://steemitimages.com/DQmVC2PhUp2ABLt3vYKs1B4VqkFTfSJQYuvcnWp89MCqukA/er5.png\",\"https://steemitimages.com/DQmQKRSt5xsfrtsr8GHduV3BG4NJGZj981AGDh275XWMciJ/er7.png\"],\"links\":[\"https://xamarin.com/forms\",\"https://github.com/elsedongusu\",\"https://github.com/elsedongusu/xmarina\",\"https://www.microsoft.com/en-us/sql-server/sql-server-downloads\",\"https://docs.microsoft.com/tr-tr/aspnet/web-api/overview/getting-started-with-aspnet-web-api/tutorial-your-first-web-api\",\"https://www.visualstudio.com/tr/downloads/?rr=https%3A%2F%2Fwww.google.com.tr%2F\",\"https://www.microsoft.com/net/download/macos\",\"https://www.visualstudio.com/tr/xamarin/?rr=https%3A%2F%2Fwww.google.com.tr%2F\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}",
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      "author": "utopian-io",
      "body": "Hey @elsedongusu\n**Thanks for contributing on Utopian**.\nWe’re already looking forward to your next contribution!\n\n**Contributing on Utopian**\nLearn how to contribute on <a href='https://join.utopian.io'>our website</a> or by watching <a href='https://www.youtube.com/watch?v=8S1AtrzYY1Q'>this tutorial</a> on Youtube.\n\n**Want to chat? Join us on Discord https://discord.gg/h52nFrV.**\n\n<a href='https://v2.steemconnect.com/sign/account-witness-vote?witness=utopian-io&approve=1'>Vote for Utopian Witness!</a>",
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      "author": "rosatravels",
      "body": "@@ -68,97 +68,8 @@\n ly. \n- In the past, your contribution was not accepted because of the low quality presentation.\n  You\n",
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      "author": "rosatravels",
      "body": "@@ -13,13 +13,8 @@\n usu,\n- yes,\n  you\n@@ -31,22 +31,22 @@\n tion is \n-accept\n+review\n ed and s\n",
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      "author": "rosatravels",
      "body": "Sorry, I missed the link.  OK, take a look now.  \n\nLink to the Answers of the Questionnaire - \n\n[Click here](https://review.utopian.io/result/9/234244333)",
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      "author": "rosatravels",
      "body": "Hi @elsedongusu, yes, your contribution is accepted and scored accordingly.  In the past, your contribution was not accepted because of the low quality presentation. You need to work on your presentation and narration.",
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      "body": "@@ -105,16 +105,78 @@\n link\n-ini\n+ the\n  proje\n-nin\n+ct  here:  https://github.com/elsedongusu/weather-app-3-tutorial\n",
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      "author": "elsedongusu",
      "body": "I read the questionnaire but it says github is not providing additional resources I have put the github linkini projenin",
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      "body": "thank for advice @rosatravels     i have a question  my contrubution approved or not ? i dont understanding",
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      "author": "rosatravels",
      "body": "Thank you for your contribution. \nIt has been reviewed and scored accordingly.\n\nLink to the Answers of the Questionnaire - \n\n[Click here](https://review.utopian.io/result/9/234444333)\n\n\nSome suggestions for improvement @elsedongusu\n\n- You need to work on your presentation so that people can understand what you are saying.  Try to practise your narration so that your words are heard clearly.  Work on diction and pronunciation.\n\n- Video tutorial depends a great on the presentation and the presenter.  You need to keep people engaged in your lesson tutorial.\n\n---- \nNeed help? Write a ticket on https://support.utopian.io/. \nChat with us on [Discord](https://discord.gg/uTyJkNm). \n[[utopian-moderator]](https://join.utopian.io/)",
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      "author": "steemitboard",
      "body": "Congratulations @elsedongusu! You have completed some achievement on Steemit and have been rewarded with new badge(s) :\n\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/posts.png)](http://steemitboard.com/@elsedongusu) Award for the number of posts published\n\nClick on any badge to view your own Board of Honor on SteemitBoard.\n\nTo support your work, I also upvoted your post!\nFor more information about SteemitBoard, click [here](https://steemit.com/@steemitboard)\n\nIf you no longer want to receive notifications, reply to this comment with the word `STOP`\n\n> Upvote this notification to help all Steemit users. Learn why [here](https://steemit.com/steemitboard/@steemitboard/http-i-cubeupload-com-7ciqeo-png)!",
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