瞭解WCF定製的綁定類型（1）_信道範型支持

     WCF中信道中支持多種類型的信道範型，其中包括單向通信模式（IInputChannel、IOutputChannel）、雙工通信模式（IDuplexChannel）和請求響應通信模式（IReplyChannel、IRequestChannel），各個通信模式還有相應的會話支持版本。在這些範型中，爲了有效的進行通信，都會有信道監聽器（一般是在服務器端，爲各個訪問的客戶端打開一道通信之門）和信道工廠（一般在客戶單端，負責建立到服務器的信息傳輸通道），兩者存在一對一或是一對多的關係。

    WCF中本身已經根據不同的環境需求建立了多種定製的綁定類型，這些綁定類型並不是通用類型，其都各自適合某種環境。可以通過綁定實例的CanBuildChannelListener<T>()和CanBuildChannelFactory<T>()方法來判定綁定是否支持某種類型的信道範型。

   可以通過反射方法獲取定製的綁定類型適用的信道範型，具體代碼如下：

運行環境：VS2010 windows控制檯程序 .Net v4.0.30319 【需先引用System.ServiceModel】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Reflection;

namespace DuServer
{
    class Program
    {
        static void Main(string[] args)
        {            
            Module[] mods = Assembly.LoadWithPartialName("System.ServiceModel").GetModules();
            List<Binding> allBinding=new List<Binding>();
            Console.WriteLine("WCF定製的綁定類型：");
            foreach (Module mod in mods)
            {
                foreach (Type type in mod.GetTypes())
                {
                   if(type.Name.EndsWith("Binding"))
                   {
                       //此處需把CustomBinding排除在外，因爲其建立之後必須制定信道範型
                       if (type.IsClass&&!type.IsAbstract&&type.Name!="CustomBinding")
                       {
                           //因要調用綁定的無參構造函數，所以必須先判定綁定類型是否存在無參構造函數
                           var ctor = type.GetConstructor(new Type[] { });
                           if (ctor != null)
                           {
                               allBinding.Add((Binding)Activator.CreateInstance(type));
                               Console.WriteLine("   " + type.Name);      
                           }                                             
                       }
                   }
                }
            }

            Console.WriteLine("各個定製綁定類型對信道範型的支持：");
            foreach (Binding binding in allBinding)
            {
                Console.WriteLine(" " + binding.Name);
                Dictionary<string, bool> result = ChannelsOfBinding(binding);
                foreach (KeyValuePair<string, bool> KeyValue in result)
                {
                    if (KeyValue.Value)
                    {
                        Console.WriteLine("   {0,-8}:  {1}","Listener",KeyValue.Key.ToString());
                    }
                }
                Dictionary<string, bool> factoryResult = ChannelsOfBindingFactory(binding);
                foreach (KeyValuePair<string, bool> KeyValue in factoryResult)
                {
                    if (KeyValue.Value)
                    {
                        Console.WriteLine("   {0,-8}:  {1}","Factory", KeyValue.Key.ToString());
                    }
                }
            }           
        }

        /// <summary>
        /// 獲取綁定類型對各個信道監聽器的支持
        /// </summary>
        /// <param name="binding"></param>
        /// <returns></returns>
        static Dictionary<string, bool> ChannelsOfBinding(Binding binding)
        {
            Dictionary<string, bool> channelsList = new Dictionary<string, bool>();
            channelsList.Add("IInputChannel", binding.CanBuildChannelListener<IInputChannel>());
            channelsList.Add("IInputSessionChannel", binding.CanBuildChannelListener<IInputSessionChannel>());
            channelsList.Add("IOutputChannel", binding.CanBuildChannelListener<IOutputChannel>());
            channelsList.Add("IOutputSessionChannel", binding.CanBuildChannelListener<IOutputSessionChannel>());
            channelsList.Add("IDuplexChannel", binding.CanBuildChannelListener<IDuplexChannel>());
            channelsList.Add("IDuplexSessionChannel",binding.CanBuildChannelListener<IDuplexSessionChannel>());
            channelsList.Add("IDuplexContextChannel", binding.CanBuildChannelListener<IDuplexContextChannel>());
            channelsList.Add("IReplyChannel",binding.CanBuildChannelListener<IReplyChannel>());
            channelsList.Add("IReplySessionChannel", binding.CanBuildChannelListener<IReplySessionChannel>());
            channelsList.Add("IRequestChannel", binding.CanBuildChannelListener<IRequestChannel>());
            channelsList.Add("IRequestSessionChannel", binding.CanBuildChannelListener<IRequestSessionChannel>());
            return channelsList;

        }

        /// <summary>
        /// 獲取綁定類型對各個信道工廠的支持
        /// </summary>
        /// <param name="binding"></param>
        /// <returns></returns>
        static Dictionary<string, bool> ChannelsOfBindingFactory(Binding binding)
        {
            Dictionary<string, bool> channelsList = new Dictionary<string, bool>();
            channelsList.Add("IInputChannel", binding.CanBuildChannelFactory<IInputChannel>());
            channelsList.Add("IInputSessionChannel", binding.CanBuildChannelFactory<IInputSessionChannel>());
            channelsList.Add("IOutputChannel", binding.CanBuildChannelFactory<IOutputChannel>());
            channelsList.Add("IOutputSessionChannel", binding.CanBuildChannelFactory<IOutputSessionChannel>());
            channelsList.Add("IDuplexChannel", binding.CanBuildChannelFactory<IDuplexChannel>());
            channelsList.Add("IDuplexSessionChannel", binding.CanBuildChannelFactory<IDuplexSessionChannel>());
            channelsList.Add("IDuplexContextChannel", binding.CanBuildChannelFactory<IDuplexContextChannel>());
            channelsList.Add("IReplyChannel", binding.CanBuildChannelFactory<IReplyChannel>());
            channelsList.Add("IReplySessionChannel", binding.CanBuildChannelFactory<IReplySessionChannel>());
            channelsList.Add("IRequestChannel", binding.CanBuildChannelFactory<IRequestChannel>());
            channelsList.Add("IRequestSessionChannel", binding.CanBuildChannelFactory<IRequestSessionChannel>());
            return channelsList;

        }
    }
}

運行結果爲：

WCF定製的綁定類型：
   BasicHttpBinding
   BasicHttpContextBinding
   NetTcpBinding
   NetTcpContextBinding
   WSHttpBinding
   WSHttpContextBinding
   MsmqIntegrationBinding
   NetMsmqBinding
   NetNamedPipeBinding
   NetPeerTcpBinding
   WSFederationHttpBinding
   WS2007FederationHttpBinding
   WS2007HttpBinding
   WSDualHttpBinding
各個定製綁定類型對信道範型的支持：
 BasicHttpBinding
   Listener:  IReplyChannel
   Factory :  IRequestChannel
 BasicHttpContextBinding
   Listener:  IReplyChannel
   Factory :  IRequestChannel
 NetTcpBinding
   Listener:  IDuplexSessionChannel
   Factory :  IDuplexSessionChannel
 NetTcpContextBinding
   Listener:  IDuplexSessionChannel
   Factory :  IDuplexSessionChannel
 WSHttpBinding
   Listener:  IReplySessionChannel
   Factory :  IRequestSessionChannel
 WSHttpContextBinding
   Listener:  IReplySessionChannel
   Factory :  IRequestSessionChannel
 MsmqIntegrationBinding
   Listener:  IInputChannel
   Factory :  IOutputChannel
 NetMsmqBinding
   Listener:  IInputChannel
   Listener:  IInputSessionChannel
   Factory :  IOutputChannel
   Factory :  IOutputSessionChannel
 NetNamedPipeBinding
   Listener:  IDuplexSessionChannel
   Factory :  IDuplexSessionChannel
 NetPeerTcpBinding
   Listener:  IInputChannel
   Listener:  IDuplexChannel
   Factory :  IOutputChannel
   Factory :  IDuplexChannel
 WSFederationHttpBinding
   Listener:  IReplySessionChannel
   Factory :  IRequestSessionChannel
 WS2007FederationHttpBinding
   Listener:  IReplySessionChannel
   Factory :  IRequestSessionChannel
 WS2007HttpBinding
   Listener:  IReplySessionChannel
   Factory :  IRequestSessionChannel
 WSDualHttpBinding
   Listener:  IInputSessionChannel
   Listener:  IDuplexSessionChannel
   Factory :  IOutputSessionChannel
   Factory :  IDuplexSessionChannel
請按任意鍵繼續. . .

可以看到其中支持的信道範型都是成對出現的，每種綁定基本上支持1-2中通信模式。