IMethodMessage 接口
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
定义方法消息接口。
public interface class IMethodMessage : System::Runtime::Remoting::Messaging::IMessage
public interface IMethodMessage : System.Runtime.Remoting.Messaging.IMessage
[System.Runtime.InteropServices.ComVisible(true)]
public interface IMethodMessage : System.Runtime.Remoting.Messaging.IMessage
type IMethodMessage = interface
interface IMessage
[<System.Runtime.InteropServices.ComVisible(true)>]
type IMethodMessage = interface
interface IMessage
Public Interface IMethodMessage
Implements IMessage
- 派生
- 属性
- 实现
示例
下面的示例代码演示了一个自定义代理,该代理重写 RealProxy.Invoke
以便将消息信息写入控制台并立即返回,而无需进行远程调用。
// This class requires full trust
[PermissionSetAttribute(SecurityAction::Demand, Name = "FullTrust")]
public ref class MyProxyClass: public RealProxy
{
private:
Object^ myObjectInstance;
Type^ myType;
public:
MyProxyClass( Type^ argType )
: RealProxy( argType )
{
myType = argType;
myObjectInstance = Activator::CreateInstance( argType );
}
// Overriding the Invoke method of RealProxy.
virtual IMessage^ Invoke( IMessage^ message ) override
{
IMethodMessage^ myMethodMessage = dynamic_cast<IMethodMessage^>(message);
Console::WriteLine( "**** Begin Invoke ****" );
Console::WriteLine( "\tType is : {0}", myType );
Console::WriteLine( "\tMethod name : {0}", myMethodMessage->MethodName );
for ( int i = 0; i < myMethodMessage->ArgCount; i++ )
{
Console::WriteLine( "\tArgName is : {0}", myMethodMessage->GetArgName( i ) );
Console::WriteLine( "\tArgValue is: {0}", myMethodMessage->GetArg( i ) );
}
if ( myMethodMessage->HasVarArgs )
Console::WriteLine( "\t The method have variable arguments!!" );
else
Console::WriteLine( "\t The method does not have variable arguments!!" );
// Dispatch the method call to the real Object*.
Object^ returnValue = myType->InvokeMember( myMethodMessage->MethodName, BindingFlags::InvokeMethod, nullptr, myObjectInstance, myMethodMessage->Args );
Console::WriteLine( "**** End Invoke ****" );
// Build the return message to pass back to the transparent proxy.
ReturnMessage^ myReturnMessage = gcnew ReturnMessage( returnValue,nullptr,0,nullptr,dynamic_cast<IMethodCallMessage^>(message) );
return myReturnMessage;
}
};
public class MyProxyClass : RealProxy
{
private Object myObjectInstance = null;
private Type myType = null;
public MyProxyClass(Type argType) : base(argType)
{
myType = argType;
myObjectInstance = Activator.CreateInstance(argType);
}
// Overriding the Invoke method of RealProxy.
public override IMessage Invoke(IMessage message)
{
IMethodMessage myMethodMessage = (IMethodMessage)message;
Console.WriteLine("**** Begin Invoke ****");
Console.WriteLine("\tType is : " + myType);
Console.WriteLine("\tMethod name : " + myMethodMessage.MethodName);
for (int i=0; i < myMethodMessage.ArgCount; i++)
{
Console.WriteLine("\tArgName is : " + myMethodMessage.GetArgName(i));
Console.WriteLine("\tArgValue is: " + myMethodMessage.GetArg(i));
}
if(myMethodMessage.HasVarArgs)
Console.WriteLine("\t The method have variable arguments!!");
else
Console.WriteLine("\t The method does not have variable arguments!!");
// Dispatch the method call to the real object.
Object returnValue = myType.InvokeMember( myMethodMessage.MethodName, BindingFlags.InvokeMethod, null,
myObjectInstance, myMethodMessage.Args );
Console.WriteLine("**** End Invoke ****");
// Build the return message to pass back to the transparent proxy.
ReturnMessage myReturnMessage = new ReturnMessage( returnValue, null, 0, null,
(IMethodCallMessage)message );
return myReturnMessage;
}
}
<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Public Class MyProxyClass
Inherits RealProxy
Private myObjectInstance As Object = Nothing
Private myType As Type = Nothing
Public Sub New(argType As Type)
MyBase.New(argType)
myType = argType
myObjectInstance = Activator.CreateInstance(argType)
End Sub
' Overriding the Invoke method of RealProxy.
Public Overrides Function Invoke(message As IMessage) As IMessage
Dim myMethodMessage As IMethodMessage = CType(message, IMethodMessage)
Console.WriteLine("**** Begin Invoke ****")
Console.WriteLine(ControlChars.Tab + "Type is : " + myType.ToString())
Console.WriteLine(ControlChars.Tab + "Method name : " + myMethodMessage.MethodName)
Dim i As Integer
For i = 0 To myMethodMessage.ArgCount - 1
Console.WriteLine(ControlChars.Tab + "ArgName is : " + myMethodMessage.GetArgName(i))
Console.WriteLine(ControlChars.Tab + "ArgValue is: " + myMethodMessage.GetArg(i))
Next i
If myMethodMessage.HasVarArgs Then
Console.WriteLine(ControlChars.Tab + " The method have variable arguments!!")
Else
Console.WriteLine(ControlChars.Tab + " The method does not have variable arguments!!")
End If
' Dispatch the method call to the real object.
Dim returnValue As Object = myType.InvokeMember(myMethodMessage.MethodName, _
BindingFlags.InvokeMethod, Nothing, myObjectInstance, myMethodMessage.Args)
Console.WriteLine("**** End Invoke ****")
' Build the return message to pass back to the transparent proxy.
Dim myReturnMessage As New ReturnMessage(returnValue, Nothing, 0, Nothing, _
CType(message, IMethodCallMessage))
Return myReturnMessage
End Function 'Invoke
End Class
注解
方法消息用于向/从远程方法发送信息。 例如,用于远程方法调用的消息实现 IMethodMessage 接口。
属性
ArgCount |
获取传递给该方法的参数的数目。 |
Args |
获取传递给该方法的参数数组。 |
HasVarArgs |
获取一个值,该值指示消息是否具有变量参数。 |
LogicalCallContext |
获取当前方法调用的 LogicalCallContext。 |
MethodBase |
获取被调用方法的 MethodBase。 |
MethodName |
获取被调用方法的名称。 |
MethodSignature |
获取包含方法签名的对象。 |
Properties |
获取表示消息属性集合的 IDictionary。 (继承自 IMessage) |
TypeName |
获取要将该调用发送到的特定对象的完整 Type 名称。 |
Uri |
获取要将该调用发送到的特定对象的 URI。 |
方法
GetArg(Int32) |
获取作为 Object 的特定参数。 |
GetArgName(Int32) |
获取传递给该方法的参数的名称。 |