tutorials.de - Einzelnen Beitrag anzeigen

**Thomas Darimont** · Thomas Darimont

Hallo!

Hier mal ein kleines Beispiel wie man unter .Net Dynamic Proxies in C# erzeugen kann:

            
                    csharp Code: 
                  
                        using System;
using System.Collections.Generic;
using System.Text;
using RealProxy = System.Runtime.Remoting.Proxies.RealProxy;
using IMessage = System.Runtime.Remoting.Messaging.IMessage;
using ReturnMessage = System.Runtime.Remoting.Messaging.ReturnMessage;
using IMethodCallMessage = System.Runtime.Remoting.Messaging.IMethodCallMessage;
using TargetInvocationException = System.Reflection.TargetInvocationException;
 
namespace De.Tutorials.Training
{
    class DynamicProxyExample
    {
 
        public static void Main(string[] args)
        {
            IBusinessService businessService = new SimpleProxy(typeof(IBusinessService), new BusinessServiceImpl()).GetTransparentProxy() as IBusinessService;
            Console.WriteLine(businessService.BusinessOperation("Proxy"));
        }
    }
 
    class SimpleProxy : RealProxy
    {
 
        object target;
 
        public SimpleProxy(Type type, object target)
            : base(type)
        {
            this.target = target;
        }
 
        public override IMessage Invoke(IMessage message)
        {
            IMethodCallMessage methodCallMessage = (IMethodCallMessage)message;
            try
            {
                Console.WriteLine("Before: " + methodCallMessage.MethodName);
 
                object result = target.GetType().GetMethod(methodCallMessage.MethodName, (Type[])methodCallMessage.MethodSignature).Invoke(target, methodCallMessage.InArgs);
 
                Console.WriteLine("After: " + methodCallMessage.MethodName);
 
                return new ReturnMessage(result, null, 0, methodCallMessage.LogicalCallContext, methodCallMessage);
            }
            catch (TargetInvocationException targetInvocationException)
            {
                return new ReturnMessage(targetInvocationException, methodCallMessage);
            }
 
        }
    }
 
    interface IBusinessService
    {
        string BusinessOperation(string args);
    }
 
    class BusinessServiceImpl
        : IBusinessService
    {
        public string BusinessOperation(string args)
        {
            Console.WriteLine("Hallo " + args);
 
            return args;
        }
    }
}

Ausgabe:

            
                    Code:
                  
                   	Before: BusinessOperation
Hallo Proxy
After: BusinessOperation
Proxy

Gruß Tom


Netiquette - Kontakt - Sitemap - Datenschutzerklärung - Nach oben

Partner-Websites von tutorials.de: der-webdesigner.net \| DesignerInAction \| Design Nation \| Flashhilfe \| PHP-Resource \| PHPwelt \| PSD-Tutorials.de \| Rettet das Internet \| Webmasterpro Alle Zeitangaben in WEZ +1. Es ist jetzt 22:40 Uhr.