LogicalMethodInfo.BeginInvoke(Object, Object[], AsyncCallback, Object) Méthode

Définition

Espace de noms:

System.Web.Services.Protocols

Assembly:

System.Web.Services.dll

Commence un appel asynchrone de la méthode représentée par LogicalMethodInfo.

public:
 IAsyncResult ^ BeginInvoke(System::Object ^ target, cli::array <System::Object ^> ^ values, AsyncCallback ^ callback, System::Object ^ asyncState);

public IAsyncResult BeginInvoke (object target, object[] values, AsyncCallback callback, object asyncState);

member this.BeginInvoke : obj * obj[] * AsyncCallback * obj -> IAsyncResult

Public Function BeginInvoke (target As Object, values As Object(), callback As AsyncCallback, asyncState As Object) As IAsyncResult

Paramètres

target

Object

Instance de Object sur laquelle appeler la méthode.

values

Object[]

Liste d'arguments de la méthode appelée. Il s'agit d'un tableau d'objets ayant les mêmes nombre, ordre et type que les paramètres de la méthode. Si la méthode ne requiert aucun paramètre, values devrait être null.

callback

AsyncCallback

Délégué à appeler une fois l'appel asynchrone terminé. Si callback a la valeur null, le délégué n'est pas appelé.

asyncState

Object

Informations relatives à l'état passées au délégué.

Retours

IAsyncResult

IAsyncResult passé à EndInvoke(Object, IAsyncResult) pour obtenir les valeurs de retour de l'appel de méthode distante.

Exceptions

TargetException

Le paramètre target a la valeur null.

ArgumentException

Le nombre, le type et l'ordre des paramètres de values ne correspondent pas à la signature de la méthode appelée.

MemberAccessException

L'appelant n'a pas l'autorisation d'appeler la méthode.

Exemples

public:
   [PermissionSet(SecurityAction::Demand, Name="FullTrust")]
   static void main()
   {
      // Get the type information.
      // Note: The MyMath class is a proxy class generated by the Wsdl.exe
      // utility for the Math Web service. This class can also be found in
      // the SoapHttpClientProtocol class example.
      Type^ myType = MyMath::MyMath::typeid;

      // Get the method info.
      MethodInfo^ myBeginMethod = myType->GetMethod( "BeginAdd" );
      MethodInfo^ myEndMethod = myType->GetMethod( "EndAdd" );

      // Create an instance of the LogicalMethodInfo class.
      array<MethodInfo^>^ temp0 = { myBeginMethod, myEndMethod };
      LogicalMethodInfo^ myLogicalMethodInfo =
         ( LogicalMethodInfo::Create( temp0, LogicalMethodTypes::Async ) )[ 0 ];

      // Get an instance of the proxy class.
      MyMath::MyMath^ myMathService = gcnew MyMath::MyMath;

      // Call the MyEndIntimationMethod method to intimate the end of
      // the asynchronous call.
      AsyncCallback^ myAsyncCallback = gcnew AsyncCallback( MyEndIntimationMethod );

      // Begin to invoke the Add method.
      array<Object^>^ temp1 = { 10, 10 };
      IAsyncResult^ myAsyncResult = myLogicalMethodInfo->BeginInvoke(
         myMathService, temp1, myAsyncCallback, nullptr );

      // Wait until invoke is complete.
      myAsyncResult->AsyncWaitHandle->WaitOne();

      // Get the result.
      array<Object^>^ myReturnValue;
      myReturnValue = myLogicalMethodInfo->EndInvoke( myMathService, myAsyncResult );

      Console::WriteLine( "Sum of 10 and 10 is {0}", myReturnValue[ 0 ] );
   }

   // This method will be called at the end of the asynchronous call.
   static void MyEndIntimationMethod( IAsyncResult^ /*Result*/ )
   {
      Console::WriteLine( "Asynchronous call on Add method finished." );
   }

public static void Main()
{
   // Get the type information.
   // Note: The MyMath class is a proxy class generated by the Wsdl.exe
   // utility for the Math Web service. This class can also be found in
   // the SoapHttpClientProtocol class example.
   Type myType = typeof(MyMath.MyMath);

   // Get the method info.
   MethodInfo myBeginMethod = myType.GetMethod("BeginAdd");
   MethodInfo myEndMethod = myType.GetMethod("EndAdd");

   // Create an instance of the LogicalMethodInfo class.
   LogicalMethodInfo myLogicalMethodInfo =
      (LogicalMethodInfo.Create(new MethodInfo[] {myBeginMethod,myEndMethod},
      LogicalMethodTypes.Async))[0];

   // Get an instance of the proxy class.
   MyMath.MyMath myMathService = new MyMath.MyMath();

   // Call the MyEndIntimationMethod method to intimate the end of
   // the asynchronous call.
   AsyncCallback myAsyncCallback = new AsyncCallback(MyEndIntimationMethod);

   // Begin to invoke the Add method.
   IAsyncResult myAsyncResult = myLogicalMethodInfo.BeginInvoke(
      myMathService,new object[]{10,10},myAsyncCallback,null);

   // Wait until invoke is complete.
   myAsyncResult.AsyncWaitHandle.WaitOne();

   // Get the result.
   object[] myReturnValue;
   myReturnValue = myLogicalMethodInfo.EndInvoke(myMathService,myAsyncResult);

   Console.WriteLine("Sum of 10 and 10 is " + myReturnValue[0]);
}

// This method will be called at the end of the asynchronous call.
static void MyEndIntimationMethod(IAsyncResult Result)
{
   Console.WriteLine("Asynchronous call on Add method finished.");
}

Public Shared Sub Main()

   ' Get the type information.
   ' Note: The MyMath class is a proxy class generated by the Wsdl.exe 
   ' utility for the Math Web Service. This class can also be found in
   ' the SoapHttpClientProtocol class example. 
   Dim myType As Type = GetType(MyMath.MyMath)

   ' Get the method info.
   Dim myBeginMethod As MethodInfo = myType.GetMethod("BeginAdd")
   Dim myEndMethod As MethodInfo = myType.GetMethod("EndAdd")

   ' Create an instance of the LogicalMethodInfo class.
   Dim myLogicalMethodInfo As LogicalMethodInfo = _
      LogicalMethodInfo.Create(New MethodInfo() {myBeginMethod, myEndMethod}, _
      LogicalMethodTypes.Async)(0)

   ' Get an instance of the proxy class.
   Dim myMathService As New MyMath.MyMath()

   ' Call the MyEndIntimationMethod method to intimate the end of 
   ' the asynchronous call.
   Dim myAsyncCallback As New AsyncCallback(AddressOf MyEndIntimationMethod)

   ' Beging to invoke the Add method.
   Dim myAsyncResult As IAsyncResult = _
      myLogicalMethodInfo.BeginInvoke( _
      myMathService, New Object() {10, 10}, myAsyncCallback, Nothing)

   ' Wait until invoke is complete.
   myAsyncResult.AsyncWaitHandle.WaitOne()

   ' Get the result.
   Dim myReturnValue() As Object
   myReturnValue = myLogicalMethodInfo.EndInvoke(myMathService, myAsyncResult)

   Console.WriteLine(("Sum of 10 and 10 is " & myReturnValue(0)))
End Sub

' This method will be called at the end of asynchronous call.
Shared Sub MyEndIntimationMethod(ByVal Result As IAsyncResult)
   Console.WriteLine("Asynchronous call on method 'Add' finished.")
End Sub