CallContext.SetData Method

Stores a given object and associates it with the specified name.

[Visual Basic]
Public Shared Sub SetData( _
   ByVal name As String, _
   ByVal data As Object _
)
[C#]
public static void SetData(
 string name,
 object data
);
[C++]
public: static void SetData(
 String* name,
 Object* data
);
[JScript]
public static function SetData(
   name : String,
 data : Object
);

Parameters

name

The name with which to associate the new item in the call context.

data

The object to store in the call context.

Exceptions

Example

[Visual Basic, C#, C++] The following code example demonstrates the use of the SetData method to transmit Principal and Identity Objects to a remote location for identification. To view the code for the LogicalCallContextData class used in this sample, see the example for the ILogicalThreadAffinative interface. To view the code for the HelloServiceClass class used in this sample, see the example for the GetData method. To view the code for the server class used in this sample, see example for the RegisterActivatedServiceType class.

[Visual Basic] 
Imports System
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Channels
Imports System.Runtime.Remoting.Channels.Tcp
Imports System.Runtime.Remoting.Messaging
Imports System.Security.Principal


Public Class ClientClass
      
   Public Shared Sub Main()
      
      Dim ident As New GenericIdentity("Bob")
      Dim prpal As New GenericPrincipal(ident, New String() {"Level1"})
      Dim data As New LogicalCallContextData(prpal)
      
      'Enter data into the CallContext
      CallContext.SetData("test data", data)
      
      
      Console.WriteLine(data.numOfAccesses)
      
      ChannelServices.RegisterChannel(New TcpChannel())
      
      RemotingConfiguration.RegisterActivatedClientType(GetType(HelloServiceClass), "tcp://localhost:8082")
      
      Dim service As New HelloServiceClass()
      
      If service Is Nothing Then
         Console.WriteLine("Could not locate server.")
         Return
      End If
      
      
      ' call remote method
      Console.WriteLine()
      Console.WriteLine("Calling remote object")
      Console.WriteLine(service.HelloMethod("Caveman"))
      Console.WriteLine(service.HelloMethod("Spaceman"))
      Console.WriteLine(service.HelloMethod("Bob"))
      Console.WriteLine("Finished remote object call")
      Console.WriteLine()
      
      'Extract the returned data from the call context
      Dim returnedData As LogicalCallContextData = CType(CallContext.GetData("test data"), LogicalCallContextData)
      
      Console.WriteLine(data.numOfAccesses)
      Console.WriteLine(returnedData.numOfAccesses)

   End Sub 'Main

End Class 'ClientClass

[C#] 
using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Messaging;
using System.Security.Principal;

public class ClientClass {

   public static void Main() {
      
      GenericIdentity ident = new GenericIdentity("Bob");
      GenericPrincipal prpal = new GenericPrincipal(ident, 
                                                    new string[] {"Level1"});
      LogicalCallContextData data = new LogicalCallContextData(prpal);      
      
      //Enter data into the CallContext
      CallContext.SetData("test data", data);

      
      Console.WriteLine(data.numOfAccesses);

      ChannelServices.RegisterChannel(new TcpChannel());

      RemotingConfiguration.RegisterActivatedClientType(typeof(HelloServiceClass),
                                                        "tcp://localhost:8082");

      HelloServiceClass service = new HelloServiceClass();

      if(service == null) {
          Console.WriteLine("Could not locate server.");
          return;
      }


      // call remote method
      Console.WriteLine();
      Console.WriteLine("Calling remote object");
      Console.WriteLine(service.HelloMethod("Caveman"));
      Console.WriteLine(service.HelloMethod("Spaceman"));
      Console.WriteLine(service.HelloMethod("Bob"));
      Console.WriteLine("Finished remote object call");
      Console.WriteLine();

      //Extract the returned data from the call context
      LogicalCallContextData returnedData = 
         (LogicalCallContextData)CallContext.GetData("test data");

      Console.WriteLine(data.numOfAccesses);
      Console.WriteLine(returnedData.numOfAccesses);
   }
}

[C++] 
#using <mscorlib.dll>
#using <system.dll>
#using <system.runtime.remoting.dll>

#using <service.dll>

using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Tcp;
using namespace System::Runtime::Remoting::Messaging;
using namespace System::Security::Principal;

int main() 
{
    GenericIdentity* ident = new GenericIdentity(S"Bob");
    String* id __gc[] = new String* __gc[1];
    id[0] = S"Level1";

    GenericPrincipal* prpal = new GenericPrincipal(ident, id );
    LogicalCallContextData* data = new LogicalCallContextData(prpal);      

    //Enter data into the CallContext
    CallContext::SetData(S"test data", data);

    Console::WriteLine(data->numOfAccesses);

    ChannelServices::RegisterChannel(new TcpChannel());

    RemotingConfiguration::RegisterActivatedClientType(__typeof(HelloServiceClass),
        S"tcp://localhost:8082");

    HelloServiceClass* service = new HelloServiceClass();

    if (service == 0) 
    {
        Console::WriteLine(S"Could not locate server.");
        return 0;
    }

    // call remote method
    Console::WriteLine();
    Console::WriteLine(S"Calling remote Object*");
    Console::WriteLine(service->HelloMethod(S"Caveman"));
    Console::WriteLine(service->HelloMethod(S"Spaceman"));
    Console::WriteLine(service->HelloMethod(S"Bob"));
    Console::WriteLine(S"Finished remote Object* call");
    Console::WriteLine();

    //Extract the returned data from the call context
    LogicalCallContextData* returnedData = 
        static_cast<LogicalCallContextData*>(CallContext::GetData(S"test data"));

    Console::WriteLine(data->numOfAccesses);
    Console::WriteLine(returnedData->numOfAccesses);

    return 0;
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

• SecurityPermission for operating with infrastructure code. Demand value: SecurityAction.LinkDemand; Permission value: SecurityPermissionFlag.Infrastructure

See Also

CallContext Class | CallContext Members | System.Runtime.Remoting.Messaging Namespace