LogicalMethodInfo::AsyncResultParameter Property
Gets the return value of a Begin asynchronous method invocation.
Assembly: System.Web.Services (in System.Web.Services.dll)
Property Value
Type: System.Reflection::ParameterInfoA 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 ); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.