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Create a Web API and Consume it in Windows Store App Using GridView

By Richa Garg on Aug 28 2012
In this article I will explain how to create a Web API using Visual Studio 2012 and how to consume it from a Windows Store App.
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To perform database binding we consume the WebAPI in Windows 8 apps, but first we have to create the webapi so that we can consume it. To create the Webapi use the following steps.

Step 1

First open the Visual Studio 2012 RC, then click on File -> New -> Project. A window is shown; in this select web from the Visual C# installed pane and then "ASP.Net MVC 4 Web Application" from the center pane. Give the name of the project as "EmployeeWebApi" and click ok.


Step 2

Then a new Project ASP.Net MVC 4 window is opened. In this select web API and click ok.


Step 3

Now to create the webapi first add a model class by right-clicking on the Model folder which resides in the Solution Explorer at the right hand side and then click add then class as:

Step 4

A window is shown; in this select class and give the name of the class as "employee.cs" then click ok.


Step 5

Now add the code in the employee.cs file as:

namespace EmployeeWebApi.Models
public class employee


        public int Employee_Id { get; set; }

        public string Employee_Name { get; set; }

        public string Employee_Address { get; set; }

        public long Employee_Contact { get; set; }

        public long Employee_Salary { get; set; }



Step 6

Add a controller by right-clicking on the controller folder which is created in the Solution Explorer and click add then controller as:


Step 7

An add controller window is sahown; in this give the name of the controller as EmployeeController and select Empty API Controller from the available templates and then click ok as:


Step 8

Now add the code in the controller as:

using EmployeeWebApi.Models;



    public class EmployeeController : ApiController


        employee[] employee = new employee[]


          new employee{Employee_Id=1,Employee_Name="Richa",Employee_Address="Noida",Employee_Contact=12567,Employee_Salary=5000},

          new employee{Employee_Id=2,Employee_Name="Megha",Employee_Address="Delhi",Employee_Contact=98754,Employee_Salary=5435},

          new employee{Employee_Id=3,Employee_Name="Gaurav",Employee_Address="Noida",Employee_Contact=33333,Employee_Salary=4233},

          new employee{Employee_Id=4,Employee_Name="Suyash",Employee_Address="Delhi",Employee_Contact=5555,Employee_Salary=2342},

          new employee{Employee_Id=5,Employee_Name="Manish",Employee_Address="Noida",Employee_Contact=84576,Employee_Salary=4555},

          new employee{Employee_Id=6,Employee_Name="Manish",Employee_Address="Noida",Employee_Contact=84576,Employee_Salary=4555},

          new employee{Employee_Id=7,Employee_Name="Ram",Employee_Address="Delhi",Employee_Contact=6456,Employee_Salary=4555},

          new employee{Employee_Id=8,Employee_Name="Rajesh",Employee_Address="Gaziyabad",Employee_Contact=8865,Employee_Salary=4555},

          new employee{Employee_Id=9,Employee_Name="Deepak",Employee_Address="Hapur",Employee_Contact=34242,Employee_Salary=4555},

          new employee{Employee_Id=10,Employee_Name="Naveen",Employee_Address="Gaziyabad",Employee_Contact=86756,Employee_Salary=4555},

          new employee{Employee_Id=11,Employee_Name="Rakesh",Employee_Address="Noida",Employee_Contact=8564,Employee_Salary=4555}


        public IEnumerable<employee> GetAllEmployee()


            return employee;




Step 9

Now run your application by pressing F5; the output will look like:


This shows that our API is loaded successfully. Now to view our API, paste the URL as:
The output is displayed in JSON format as:


Step 10

Now to consume this web API in Windows Store apps first close this project and open a new project by clicking File -> New -> Project. In the window that appears select Windows Store from the Visual C# installed pane and select blank page from the center pane then give the name of the project as "EmployeeDetail" and click ok.


Step 11

Add the class by right-clicking on the project in the Solution Explorer and click Add -> Class as:


Step 12

A window is shown. In this select class and give the name of the class that you want to give then click add as:


Step 13

Add the code in the class1.cs file as:

namespace EmployeeDetail


    class Class1


        public int Emp_Id { get; set; }

        public string Emp_Name { get; set; }

        public string Emp_Address { get; set; }

        public long Emp_Contact { get; set; }

        public long Emp_Salary { get; set; }



Step 14

Write the code in the MainPage.xaml file as:











            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">

                <GradientStop Color="Black"/>

                <GradientStop Color="#FFF3CDCD" Offset="1"/>



        <TextBlock Text="Employees Details Consume From Web API" FontSize="25" Height="50" Width="550" HorizontalAlignment="Center" VerticalAlignment="Top"/>

        <GridView Name="employee_details" ItemsSource="{Binding}" Margin="50,150,0,0">



                    <StackPanel Width="250" Height="150" Margin="10" Background="#FF161C8F">

                        <TextBlock Text="{Binding Emp_Id}" Padding="10" />

                        <TextBlock Margin="10,0">

                            <Run Text="{Binding Emp_Name}" FontSize="20" />


                        <TextBlock Margin="10,0">

                            <Run Text="{Binding Emp_Address}"/>, <Run Text="{Binding Emp_Contact}"/>


                        <TextBlock Margin="10,0">

                            <Run Text="{Binding Emp_Salary}"/>








Step 15

Write the code in the MainPage.xaml.cs file as:

namespace EmployeeDetail


    public sealed partial class MainPage : Page


        private HttpClient httpClient;

        public MainPage()



            httpClient = new HttpClient();

            httpClient.BaseAddress = new Uri("http://localhost:1191/");

            httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            // Limit the max buffer size for the response so we don't get overwhelmed

            httpClient.MaxResponseContentBufferSize = 266000;


        protected override void OnNavigatedTo(NavigationEventArgs e)




        private async void GetEmployee()


            var response = await httpClient.GetAsync("api/employee");

            if (response.IsSuccessStatusCode)


                var employee = await response.Content.ReadAsStringAsync();

                var emp = JsonArray.Parse(employee);

                var qry = from m in emp

                          select new


                              Emp_Id = m.GetObject()["Employee_Id"].GetNumber(),

                              Emp_Name = m.GetObject()["Employee_Name"].GetString(),

                              Emp_Address = m.GetObject()["Employee_Address"].GetString(),

                              Emp_Contact = m.GetObject()["Employee_Contact"].GetNumber(),

                              Emp_Salary = m.GetObject()["Employee_Salary"].GetNumber()


                employee_details.DataContext = qry;





Step 16

Now run the application by pressing F5; a screen is displayed which contains the information that is consumed from the Web API.



In this article I explained how to create the web API in .Net 4.5 and how we consume it in Windows 8 apps and display the information in a GridView.