通过

IMethodReturnMessage.OutArgCount 属性

  • 项目

获取方法调用中标记为 ref 或 out 参数的参数的数目。

**命名空间:**System.Runtime.Remoting.Messaging
**程序集:**mscorlib（在 mscorlib.dll 中）

语法

声明
ReadOnly Property OutArgCount As Integer
用法
Dim instance As IMethodReturnMessage
Dim value As Integer

value = instance.OutArgCount

int OutArgCount { get; }

property int OutArgCount {
    int get ();
}

/** @property */
int get_OutArgCount ()

function get OutArgCount () : int

属性值

方法调用中标记为 ref 或 out 参数的参数的数目。

异常

异常类型 条件

SecurityException

直接调用方通过接口引用进行调用，它没有基础结构权限。

示例

下面的代码示例显示了一个重写 RealProxy.Invoke 的自定义代理，目的是将返回消息写入到控制台。

Public Overrides Function Invoke(myMessage As IMessage) As IMessage
   Dim myCallMessage As IMethodCallMessage = CType(myMessage, IMethodCallMessage)

   Dim myIMethodReturnMessage As IMethodReturnMessage = RemotingServices. _
      ExecuteMessage(myMarshalByRefObject, myCallMessage)

   Console.WriteLine("Method name : " + myIMethodReturnMessage.MethodName)
   Console.WriteLine("The return value is : " + myIMethodReturnMessage.ReturnValue)
   
   ' Get number of 'ref' and 'out' parameters.
   Dim myArgOutCount As Integer = myIMethodReturnMessage.OutArgCount
   Console.WriteLine("The number of 'ref', 'out' parameters are : " + _
      myIMethodReturnMessage.OutArgCount.ToString())
   ' Gets name and values of 'ref' and 'out' parameters.
   Dim i As Integer
   For i = 0 To myArgOutCount - 1
      Console.WriteLine("Name of argument {0} is '{1}'.", i, _
         myIMethodReturnMessage.GetOutArgName(i))
      Console.WriteLine("Value of argument {0} is '{1}'.", i, _
         myIMethodReturnMessage.GetOutArg(i))
   Next i
   Console.WriteLine()
   Dim myObjectArray As Object() = myIMethodReturnMessage.OutArgs
   For i = 0 To myObjectArray.Length - 1
      Console.WriteLine("Value of argument {0} is '{1}' in OutArgs", i, myObjectArray(i))
   Next i
   Return myIMethodReturnMessage
End Function 'Invoke

public override IMessage Invoke(IMessage myMessage)
{
   IMethodCallMessage myCallMessage = (IMethodCallMessage)myMessage;

   IMethodReturnMessage myIMethodReturnMessage =
      RemotingServices.ExecuteMessage(myMarshalByRefObject, myCallMessage);

   Console.WriteLine("Method name : " + myIMethodReturnMessage.MethodName);
   Console.WriteLine("The return value is : " + myIMethodReturnMessage.ReturnValue);

   // Get number of 'ref' and 'out' parameters.
   int myArgOutCount = myIMethodReturnMessage.OutArgCount;
   Console.WriteLine("The number of 'ref', 'out' parameters are : " +
      myIMethodReturnMessage.OutArgCount);
   // Gets name and values of 'ref' and 'out' parameters.
   for(int i = 0; i < myArgOutCount; i++)
   {
      Console.WriteLine("Name of argument {0} is '{1}'.",
         i, myIMethodReturnMessage.GetOutArgName(i));
      Console.WriteLine("Value of argument {0} is '{1}'.",
         i, myIMethodReturnMessage.GetOutArg(i));
   }
   Console.WriteLine();
   object[] myObjectArray = myIMethodReturnMessage.OutArgs; 
   for(int i = 0; i < myObjectArray.Length; i++)
      Console.WriteLine("Value of argument {0} is '{1}' in OutArgs",
         i, myObjectArray[i]);
   return myIMethodReturnMessage;
}

virtual IMessage^ Invoke( IMessage^ myMessage ) override
{
   IMethodCallMessage^ myCallMessage = (IMethodCallMessage^)( myMessage );

   IMethodReturnMessage^ myIMethodReturnMessage =
      RemotingServices::ExecuteMessage( myMarshalByRefObject, myCallMessage );

   Console::WriteLine( "Method name : {0}", myIMethodReturnMessage->MethodName );
   Console::WriteLine( "The return value is : {0}", myIMethodReturnMessage->ReturnValue );

   // Get number of 'ref' and 'out' parameters.
   int myArgOutCount = myIMethodReturnMessage->OutArgCount;
   Console::WriteLine( "The number of 'ref', 'out' parameters are : {0}",
      myIMethodReturnMessage->OutArgCount );
   // Gets name and values of 'ref' and 'out' parameters.
   for ( int i = 0; i < myArgOutCount; i++ )
   {
      Console::WriteLine( "Name of argument {0} is '{1}'.",
         i, myIMethodReturnMessage->GetOutArgName( i ) );
      Console::WriteLine( "Value of argument {0} is '{1}'.",
         i, myIMethodReturnMessage->GetOutArg( i ) );
   }
   Console::WriteLine();
   array<Object^>^myObjectArray = myIMethodReturnMessage->OutArgs;
   for ( int i = 0; i < myObjectArray->Length; i++ )
      Console::WriteLine( "Value of argument {0} is '{1}' in OutArgs",
         i, myObjectArray[ i ] );
   return myIMethodReturnMessage;
}

public IMessage Invoke(IMessage myMessage)
{
    IMethodCallMessage myCallMessage = (IMethodCallMessage)myMessage;
    IMethodReturnMessage myIMethodReturnMessage 
        = RemotingServices.ExecuteMessage(myMarshalByRefObject,
            myCallMessage);
    Console.WriteLine("Method name : " 
        + myIMethodReturnMessage.get_MethodName());
    Console.WriteLine("The return value is : " 
        + myIMethodReturnMessage.get_ReturnValue());

    // Get number of 'ref' and 'out' parameters.
    int myArgOutCount = myIMethodReturnMessage.get_OutArgCount();

    Console.WriteLine("The number of 'ref', 'out' parameters are : " 
        + myIMethodReturnMessage.get_OutArgCount());

    // Gets name and values of 'ref' and 'out' parameters.
    for (int i = 0; i < myArgOutCount; i++) {
        Console.WriteLine("Name of argument {0} is '{1}'.",
            System.Convert.ToString(i),
            myIMethodReturnMessage.GetOutArgName(i));
        Console.WriteLine("Value of argument {0} is '{1}'.",
            System.Convert.ToString(i),
            myIMethodReturnMessage.GetOutArg(i));
    }
    Console.WriteLine();
    Object myObjectArray[] = myIMethodReturnMessage.get_OutArgs();

    for (int i = 0; i < myObjectArray.length; i++) {
        Console.WriteLine("Value of argument {0} is '{1}' in OutArgs",
            System.Convert.ToString(i), myObjectArray.get_Item(i));
    }

    return myIMethodReturnMessage;
} //Invoke

.NET Framework 安全性

平台

Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

IMethodReturnMessage 接口
IMethodReturnMessage 成员
System.Runtime.Remoting.Messaging 命名空间