WCF Endpoints

Every service has a unique address and this unique address has the three attributes Address, Binding, and Contract. In other words, we can say an endpoint is a combination of address, binding, and contract. If you are unfamiliar with address, binding and contract then please read my previous article Introduction to WCF: Part 1. In this article, I will give you a short note about these three attributes of endpoints.
Let me describe using an example. I am using my previous demo project.
In ImyService.cs
  1. namespace myFirstApp
  2. {
  3. [ServiceContract]
  4. public interface IMyService
  5. {
  6. [OperationContract]
  7. int AddTwoNo(int intFirstNo, int intSecondNo);
  8. }
  9. }
In MyService.svc.cs
  1. namespace myFirstApp
  2. {
  3. public class MyService : IMyService
  4. {
  5. public int AddTwoNo(int intFirstNo, int intSecondNo)
  6. {
  7. return intFirstNo + intSecondNo;
  8. }
  9. }
  10. }
Endpoint using web.config
  1. <?xml version="1.0"?>
  2. <configuration>
  3. <appSettings>
  4. <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  5. </appSettings>
  6. <system.web>
  7. <compilation debug="true" targetFramework="4.5" />
  8. <httpRuntime targetFramework="4.5"/>
  9. </system.web>
  10. <system.serviceModel>
  11. <services>
  12. <service name="myFirstApp.MyService" behaviorConfiguration="serviceBehaviour">
  13. <!--endpoint start here-->
  14. <endpoint address="addTwo" binding="basicHttpBinding" contract="myFirstApp.ImyService"></endpoint>
  15. <!--endpoint end here-->
  16. <host>
  17. <baseAddresses>
  18. <add baseAddress="http://localhost:36246/"/>
  19. </baseAddresses>
  20. </host>
  21. </service>
  22. </services>
  23. <behaviors>
  24. <serviceBehaviors>
  25. <behavior name="serviceBehaviour">
  26. <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
  27. <serviceDebug includeExceptionDetailInFaults="false"/>
  28. </behavior>
  29. </serviceBehaviors>
  30. </behaviors>
  31. <protocolMapping>
  32. <add binding="basicHttpsBinding" scheme="https" />
  33. </protocolMapping>
  34. <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  35. </system.serviceModel>
  36. <system.webServer>
  37. <modules runAllManagedModulesForAllRequests="true"/>
  38. <directoryBrowse enabled="true"/>
  39. </system.webServer>
  40. </configuration>
Let's update my service reference.
update service reference
In default.aspx
  1. <table>
  2. <tr><td>First No</td><td><asp:TextBox ID="txtFirst" runat="server"></asp:TextBox></td></tr>
  3. <tr><td>Second No</td><td><asp:TextBox ID="txtSec" runat="server"></asp:TextBox></td></tr>
  4. <tr><td colspan="2"><asp:Button ID="btnAdd" runat="server" Text="Add" OnClick="btnAdd_Click" /></td>
  5. </tr>
  6. <tr><td colspan="2"><asp:Label ID="lblResult" runat="server"></asp:Label></td></tr>
  7. </table>
In default.aspx.cs
  1. using System;
  3. namespace WCFClientApp
  4. {
  5. public partial class _default : System.Web.UI.Page
  6. {
  7. protected void btnAdd_Click(object sender, EventArgs e)
  8. {
  9. int intFirstNo = 0, intSecNo = 0, intResult = 0;
  10. intFirstNo = Convert.ToInt16(txtFirst.Text);
  11. intSecNo = Convert.ToInt16(txtSec.Text);
  12. WCFReference.MyServiceClient client = new WCFReference.MyServiceClient();
  13. intResult = client.AddTwoNo(intFirstNo, intSecNo);
  14. lblResult.Text = "Result is :"+intResult;
  15. client.Close();
  16. }
  17. }
  18. }
Run the application and get the expected results.
I hope this article is helpful to you.
Next Article >> How to Make Changes to WCF Service Without Breaking Client in WCF: Part 3