.NET Remoting 进阶之三——上下文(Context)例程

例子：

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Contexts;

namespace ContextTest
{
 /// <summary>
 /// Class1 的摘要说明。
 /// </summary>
 [Synchronization]
 public class MyContextBoundClass: ContextBoundObject
 {
 }

 public class MyAgilClass
 {
 }

 class ContextTest
 {
  static void Main(string[] args)
  {
   MyContextBoundClass myBound = new MyContextBoundClass();
   MyAgilClass myAgile = new MyAgilClass();

   Console.WriteLine("Is myBound out of context?

{0}",RemotingServices.IsObjectOutOfContext(myBound));
   Console.WriteLine("Is myAgile out of context?

{0}",RemotingServices.IsObjectOutOfContext(myAgile));

   Console.WriteLine("Is myBound a proxy ?

{0}",RemotingServices.IsTransparentProxy(myBound));
   Console.WriteLine("Is myAgile a proxy ?

{0}",RemotingServices.IsTransparentProxy(myAgile));

   Console.ReadLine();
  }
 }

}

运行结果：
Is myBound out of context? true
Is myAgile out of context? false
Is myBound a proxy ?  true 
Is myAgile a proxy ?  false

    利用 Thread.CurrentContext 静态方法，您可以获取对当前正在执行的上下文的引用。所返回的 Context 对象可用来查找与上下文相关的各种信息。

将上个例子稍做修改：
using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Contexts;
using System.Threading;

namespace ContextTest
{
 /// <summary>
 /// Class1 的摘要说明。
 /// </summary>
 [Synchronization]
 public class MyContextBoundClass: ContextBoundObject
 {
  public MyContextBoundClass()
  {
   Console.WriteLine("in MyContextBoundClass Constructor");
   Diagnostics.DisplayContextInfo();
  }
 }

 public class MyAgilClass
 {
 }

 public class Diagnostics
 {
  public static void DisplayContextInfo()
  {
   Context ctx = Thread.CurrentContext;
   Console.WriteLine("Properties for context id:{0}", ctx.ContextID);
   foreach(IContextProperty ctxProp in ctx.ContextProperties)
   {
    Console.WriteLine("{0}",ctxProp.Name);
   }
  }
 }

 class ContextTest
 {
  static void Main(string[] args)
  {
//   MyContextBoundClass myBound = new MyContextBoundClass();
//   MyAgilClass myAgile = new MyAgilClass();
//
//   Console.WriteLine("Is myBound out of context? {0}",RemotingServices.IsObjectOutOfContext(myBound));
//   Console.WriteLine("Is myAgile out of context? {0}",RemotingServices.IsObjectOutOfContext(myAgile));
//
//   Console.WriteLine("Is myBound a proxy ? {0}",RemotingServices.IsTransparentProxy(myBound));
//   Console.WriteLine("Is myAgile a proxy ? {0}",RemotingServices.IsTransparentProxy(myAgile));
//
//   Console.ReadLine();
   Console.WriteLine("In Main");
   Diagnostics.DisplayContextInfo();
   MyContextBoundClass myBound = new MyContextBoundClass();

   Console.ReadLine();

  } 
 }
}

本文转自 august 51CTO博客，原文链接：http://blog.51cto.com/august/6925，如需转载请自行联系原作者