WCF Example in C#

In this article, we will learn about WCF services with an example.

• First create a class library and name it TestService. (Execute VisualStudio using "Run as Administrator".)
• Next add one WCF Service class to the class library.
• It will create TestService.cs and one interface class ITestService.cs.

Here I am writing a string that we want in the output of the service.

[ServiceContract]
public interface ITestService
{
    [OperationContract]
    string GetMessage(string Name,string Email,string Address);
}

Then we need to change the TestService.cs (because Testservice.cs inherits ITestService.cs).

public class TestService : ITestService
{
    public string GetMessage(string Name,string Email,string Address)
    {
        return "Hello" + Name + "Email" + Email + "Address" + Address;
    }
}

• Next we need to add a Console Application to the solution, name it TestServicehost.
• Next add a reference for System.Servicemodel to the project.
• Next add the TestService project as a reference.

Next modify the Main method as in the following:

static void Main()
{
     using (ServiceHost host = new ServiceHost(typeof(TestService.TestService)))
     {
         host.Open();
         Console.WriteLine("Host strated @" + DateTime.Now.ToString());
         Console.ReadLine();
    }
}

Next add an Application Configuration file to the project. Provide the following code for it:

<system.serviceModel>
    <services>
      <service  name="TestService.TestService" behaviorConfiguration="mexBehavior">
        <endpoint address="HelloService" binding="basicHttpBinding" contract="TestService.ITestService">
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange">
        </endpoint>
        <host>
          <baseAddresses>
            <add baseAddress ="http://localhost:8080/"/>
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="mexBehavior">
          <serviceMetadata httpGetEnabled="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
</system.serviceModel>

Next, set TestServiceHost as the start up project. Then a command prompt window will open.

 

• Next open Visual Studio and again use "Run as administrator".
• Create New->Project->Web->ASP.NET Empty Web application.
• Add System.Servicemodel as a Refernce to project.
• Add a service refernce to the project, it will open a window.

 

In the address bar, enter the URL (as you gave in the app.config). Click on go, it will show the running webservice.

Click on the web service and provide a name and then click OK.

• Next add a Webform to the project and name it Student.aspx.
• Enter the following code.

<form id="form1" runat="server">
    <table>
        <tr>
            <td>
                <asp:Label ID="lblName" runat="server" Text="Name"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblMail" runat="server" Text="Email"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtMail" runat="server"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblAddress" runat="server" Text="Address"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtAddress" runat="server"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblMsg" runat="server"></asp:Label>
            </td>
        </tr>
    </table>
</form>

In the code behind file, in the click event enter the following code.

protected void btnSubmit_Click(object sender, EventArgs e)
{
     TestService.TestServiceClient client = new TestService.TestServiceClient("BasicHttpBinding_ITestService");
     string Name=txtName.Text;
     string Email=txtMail.Text;
     string Address=txtAddress.Text;
     lblMsg.Text = client.GetMessage(Name, Email, Address);
}

Next, run the project; we will get the result.