LogicalMethodInfo.AsyncResultParameter Property

Reference

Definition

Namespace:: System.Web.Services.Protocols

Assembly:: System.Web.Services.dll

Important

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Gets the return value of a Begin asynchronous method invocation.

public:
 property System::Reflection::ParameterInfo ^ AsyncResultParameter { System::Reflection::ParameterInfo ^ get(); };

public System.Reflection.ParameterInfo AsyncResultParameter { get; }

member this.AsyncResultParameter : System.Reflection.ParameterInfo

Public ReadOnly Property AsyncResultParameter As ParameterInfo

Property Value

ParameterInfo

A ParameterInfo representing the IAsyncResult returned from a Begin asynchronous method invocation.

Examples

#using <System.dll>
#using <System.Web.dll>
#using <System.Web.Services.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Web::Services::Protocols;

public ref class MyService: public SoapHttpClientProtocol
{
public:
   IAsyncResult^ BeginAdd( int xValue, int yValue, AsyncCallback^ callback, Object^ asyncState )
   {
      array<Object^>^temp0 = {xValue,yValue};
      return this->BeginInvoke( "Add", temp0, callback, asyncState );
   }

   int EndAdd( System::IAsyncResult^ asyncResult )
   {
      array<Object^>^results = this->EndInvoke( asyncResult );
      return  *dynamic_cast<int^>(results[ 0 ]);
   }
};

int main()
{
   Type^ myType = MyService::typeid;
   MethodInfo^ myBeginMethod = myType->GetMethod( "BeginAdd" );
   MethodInfo^ myEndMethod = myType->GetMethod( "EndAdd" );
   array<MethodInfo^>^temp0 = {myBeginMethod,myEndMethod};
   LogicalMethodInfo^ myLogicalMethodInfo = LogicalMethodInfo::Create( temp0, LogicalMethodTypes::Async )[ 0 ];
   Console::WriteLine( "\nThe asynchronous callback parameter of method {0} is :\n", myLogicalMethodInfo->Name );
   Console::WriteLine( "\t {0} : {1}", myLogicalMethodInfo->AsyncCallbackParameter->Name, myLogicalMethodInfo->AsyncCallbackParameter->ParameterType );
   Console::WriteLine( "\nThe asynchronous state parameter of method {0} is :\n", myLogicalMethodInfo->Name );
   Console::WriteLine( "\t {0} : {1}", myLogicalMethodInfo->AsyncStateParameter->Name, myLogicalMethodInfo->AsyncStateParameter->ParameterType );
   Console::WriteLine( "\nThe asynchronous result parameter of method {0} is :\n", myLogicalMethodInfo->Name );
   Console::WriteLine( "\t {0} : {1}", myLogicalMethodInfo->AsyncResultParameter->Name, myLogicalMethodInfo->AsyncResultParameter->ParameterType );
   Console::WriteLine( "\nThe begin method of the asynchronous method {0} is :\n", myLogicalMethodInfo->Name );
   Console::WriteLine( "\t {0}", myLogicalMethodInfo->BeginMethodInfo );
   Console::WriteLine( "\nThe end method of the asynchronous method {0} is :\n", myLogicalMethodInfo->Name );
   Console::WriteLine( "\t {0}", myLogicalMethodInfo->EndMethodInfo );
   if ( myLogicalMethodInfo->IsAsync )
      Console::WriteLine( "\n {0} is asynchronous", myLogicalMethodInfo->Name );
   else
      Console::WriteLine( "\n {0} is synchronous", myLogicalMethodInfo->Name );
}

using System;
using System.Reflection;
using System.Web.Services.Protocols;

public class MyService : SoapHttpClientProtocol
{
   public IAsyncResult BeginAdd(int xValue, int yValue,
                                AsyncCallback callback,
                                object asyncState)
   {
      return this.BeginInvoke("Add", new object[] {xValue,yValue}, callback, asyncState);
   }

   public int EndAdd(System.IAsyncResult asyncResult)
   {
      object[] results = this.EndInvoke(asyncResult);
      return ((int)(results[0]));
   }
}

public class LogicalMethodInfo_Create
{
   public static void Main()
   {
      Type myType = typeof(MyService);
      MethodInfo myBeginMethod = myType.GetMethod("BeginAdd");
      MethodInfo myEndMethod = myType.GetMethod("EndAdd");
      LogicalMethodInfo myLogicalMethodInfo =
         (LogicalMethodInfo.Create(new MethodInfo[] { myBeginMethod,
                                                      myEndMethod },
                                   LogicalMethodTypes.Async))[0];

      Console.WriteLine("\nThe asynchronous callback parameter of method {0} is :\n",
                           myLogicalMethodInfo.Name);
      Console.WriteLine("\t" + myLogicalMethodInfo.AsyncCallbackParameter.Name +
                              " : " + myLogicalMethodInfo.AsyncCallbackParameter.ParameterType);

            Console.WriteLine("\nThe asynchronous state parameter of method {0} is :\n",
         myLogicalMethodInfo.Name);
      Console.WriteLine("\t" + myLogicalMethodInfo.AsyncStateParameter.Name +
         " : " + myLogicalMethodInfo.AsyncStateParameter.ParameterType);

      Console.WriteLine("\nThe asynchronous result parameter of method {0} is :\n",
         myLogicalMethodInfo.Name);
      Console.WriteLine("\t" + myLogicalMethodInfo.AsyncResultParameter.Name +
         " : " + myLogicalMethodInfo.AsyncResultParameter.ParameterType);

      Console.WriteLine("\nThe begin method of the asynchronous method {0} is :\n",
         myLogicalMethodInfo.Name);
      Console.WriteLine("\t" + myLogicalMethodInfo.BeginMethodInfo);

      Console.WriteLine("\nThe end method of the asynchronous method {0} is :\n",
         myLogicalMethodInfo.Name);
      Console.WriteLine("\t" + myLogicalMethodInfo.EndMethodInfo);

      if(myLogicalMethodInfo.IsAsync)
         Console.WriteLine("\n{0} is asynchronous", myLogicalMethodInfo.Name);
      else
         Console.WriteLine("\n{0} is synchronous", myLogicalMethodInfo.Name);
   }
}

Imports System.Reflection
Imports System.Web.Services.Protocols

Public Class MyService
   Inherits SoapHttpClientProtocol
   
   Public Function BeginAdd _
       (xValue As Integer, yValue As Integer, callback As AsyncCallback, asyncState As Object) _
                                                                                    As IAsyncResult
      Return Me.BeginInvoke("Add", New Object() {xValue, yValue}, callback, asyncState)
   End Function 'BeginAdd
   
   Public Function EndAdd(asyncResult As System.IAsyncResult) As Integer
      Dim results As Object() = Me.EndInvoke(asyncResult)
      Return CInt(results(0))
   End Function 'EndAdd
End Class

Public Class LogicalMethodInfo_Create
   
   Public Shared Sub Main()
      Dim myType As Type = GetType(MyService)
      Dim myBeginMethod As MethodInfo = myType.GetMethod("BeginAdd")
      Dim myEndMethod As MethodInfo = myType.GetMethod("EndAdd")
      Dim myLogicalMethodInfo As LogicalMethodInfo = _
          LogicalMethodInfo.Create(New MethodInfo() _
                          {myBeginMethod, myEndMethod}, LogicalMethodTypes.Async)(0)
      
      Console.WriteLine _
        (ControlChars.Newline + "The asynchronous callback parameter of method {0} is :" + _ 
                                             ControlChars.Newline, myLogicalMethodInfo.Name)
      Console.WriteLine _
        (ControlChars.Tab + myLogicalMethodInfo.AsyncCallbackParameter.Name + " : " + _
                    myLogicalMethodInfo.AsyncCallbackParameter.ParameterType.ToString())
      
      Console.WriteLine _
        (ControlChars.Newline + "The asynchronous state parameter of method {0} is :" + _
                                             ControlChars.Newline, myLogicalMethodInfo.Name)
      Console.WriteLine _
       (ControlChars.Tab + myLogicalMethodInfo.AsyncStateParameter.Name + " : " + _
                               myLogicalMethodInfo.AsyncStateParameter.ParameterType.ToString())
      
      Console.WriteLine _
       (ControlChars.Newline + "The asynchronous result parameter of method {0} is :" + _
                                                     ControlChars.Newline, myLogicalMethodInfo.Name)
      Console.WriteLine _
       (ControlChars.Tab + myLogicalMethodInfo.AsyncResultParameter.Name + " : " + _
                               myLogicalMethodInfo.AsyncResultParameter.ParameterType.ToString())
      
      Console.WriteLine _
        (ControlChars.Newline + "The begin method of the asynchronous method {0} is :" + _
                                             ControlChars.Newline, myLogicalMethodInfo.Name)
      Console.WriteLine(ControlChars.Tab + myLogicalMethodInfo.BeginMethodInfo.ToString())
      
      Console.WriteLine _
       (ControlChars.Newline + "The end method of the asynchronous method {0} is :" + _
                                                     ControlChars.Newline, myLogicalMethodInfo.Name)
      Console.WriteLine(ControlChars.Tab + myLogicalMethodInfo.EndMethodInfo.ToString())
      
      If myLogicalMethodInfo.IsAsync Then
         Console.WriteLine(ControlChars.Newline + "{0} is asynchronous", myLogicalMethodInfo.Name)
      Else
         Console.WriteLine(ControlChars.Newline + "{0} is synchronous", myLogicalMethodInfo.Name)
      End If 
   End Sub
End Class

Remarks

The asynchronous design pattern in the common language runtime involves calling a Begin method to start the asynchronous method invocation and an End method to complete the invocation. The Begin method typically returns immediately with an object implementing the IAsyncResult interface, which can then be passed to the End method at a later time to complete the asynchronous method invocation. The returned object implementing the IAsyncResult interface is represented by this property.

For more information on invoking XML Web services asynchronously, see Communicating with XML Web Services Asynchronously.

Applies to

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