sdk/samples/WCFSamples/TechnologySamples/Basic/Service/OperationContextScope/CS/Client/Client.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Text;
   4 using System.ServiceModel;
   5 using System.ServiceModel.Channels;
   6
   7 namespace Microsoft.ServiceModel.Samples
   8 {
   9     //Utility class that acts as the header that client will add to list of incoming headers
  10     public static class CustomHeader
  11     {
  12         public static readonly String HeaderName = "MessageHeaderGUID";
  13         public static readonly String HeaderNamespace = "http://Microsoft.ServiceModel.Samples/GUID";
  14     }
  15
  16     class MessageHeaderClient
  17     {
  18         static void Main(string[] args)
  19         {
  20             //Create two clients to the remote service.
  21             MessageHeaderReaderClient client1 = new MessageHeaderReaderClient();
  22             MessageHeaderReaderClient client2 = new MessageHeaderReaderClient();
  23
  24
  25             //Create an OperationContextScope with client1 so we can add headers.
  26             using (new OperationContextScope(client1.InnerChannel))
  27             {
  28                 //Create a new GUID that we will send as header.
  29                 String guid = Guid.NewGuid().ToString();
  30
  31                 //Create a MessageHeader for the guid we just created.
  32                 MessageHeader customHeader = MessageHeader.CreateHeader(CustomHeader.HeaderName, CustomHeader.HeaderNamespace, guid);
  33
  34                 //Add the header to the OutgoingMessageHeader collection.
  35                 OperationContext.Current.OutgoingMessageHeaders.Add(customHeader);
  36
  37                 //Now call RetreieveHeader on both the proxies. Since the OperationContextScope is tied to
  38                 //client1's InnerChannel, the header should only be added to calls made on that client.
  39                 //Calls made on client2 should not be sending the header across even though the call
  40                 //is made in the same OperationContextScope.
  41                 Console.WriteLine("Using client1 to send message");
  42                 Console.WriteLine("Did server retrieve the header? : Actual: {0}, Expected: True", client1.RetrieveHeader(guid));
  43
  44                 Console.WriteLine();
  45                 Console.WriteLine("Using client2 to send message");
  46                 Console.WriteLine("Did server retrieve the header? : Actual: {0}, Expected: False", client2.RetrieveHeader(guid));
  47             }
  48
  49             //Close the proxies.
  50             client1.Close();
  51             client2.Close();
  52
  53             Console.WriteLine();
  54             Console.WriteLine("Press <ENTER> to terminate client.");
  55             Console.ReadLine();
  56         }
  57     }
  58 }