C# 通过RealProxy引用参数
我需要通过RealProxy调用带有ref参数的方法。我已将问题归结为以下代码:C# 通过RealProxy引用参数,c#,reference,arguments,realproxy,C#,Reference,Arguments,Realproxy,我需要通过RealProxy调用带有ref参数的方法。我已将问题归结为以下代码: using System; using System.Reflection; using System.Runtime.Remoting.Messaging; using System.Runtime.Remoting.Proxies; namespace ConsoleApplication1 { class Program { static void Main(string[]
using System;
using System.Reflection;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Proxies;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
HelloClass hello=new HelloClass();
TestProxy proxy = new TestProxy(hello);
HelloClass hello2 = proxy.GetTransparentProxy() as HelloClass;
string t = "";
hello2.SayHello(ref t);
Console.Out.WriteLine(t);
}
}
public class TestProxy : RealProxy
{
HelloClass _hello;
public TestProxy(HelloClass hello)
: base(typeof(HelloClass))
{
this._hello = hello;
}
public override System.Runtime.Remoting.Messaging.IMessage Invoke(System.Runtime.Remoting.Messaging.IMessage msg)
{
IMethodCallMessage call = msg as IMethodCallMessage;
object returnValue = typeof(HelloClass).InvokeMember(call.MethodName, BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Instance, null, _hello, call.Args);
return new ReturnMessage(returnValue, null, 0, call.LogicalCallContext, call);
}
}
public class HelloClass : MarshalByRefObject
{
public void SayHello(ref string s)
{
s = "Hello World!";
}
}
}
程序应该生成“helloworld!”输出,但不知何故,ref参数的修改在代理中丢失了。我必须做什么才能使其工作?ReturnMessage的第二个参数需要包含要传回的ref和out参数的值。您可以通过保存对传入数组的引用来获取它们:
public override System.Runtime.Remoting.Messaging.IMessage Invoke(System.Runtime.Remoting.Messaging.IMessage msg)
{
IMethodCallMessage call = msg as IMethodCallMessage;
var args = call.Args;
object returnValue = typeof(HelloClass).InvokeMember(call.MethodName, BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Instance, null, _hello, args);
return new ReturnMessage(returnValue, args, args.Length, call.LogicalCallContext, call);
}
非常感谢你!这非常有帮助。