LogicalMethodInfo::AsyncResultParameter Property

 

Gets the return value of a Begin asynchronous method invocation.

Namespace:   System.Web.Services.Protocols
Assembly:  System.Web.Services (in System.Web.Services.dll)

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

Property Value

Type: System.Reflection::ParameterInfo^

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

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 [<topic://cpconInvokingWebServicesAsynchronously>].

#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 );
}

.NET Framework
Available since 1.1
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