WCF开发之邦定（Binding）

这部分的前期理论知识比较多，所以我们先从Demo入手，然后再来看理论东西。我们这部分只关注WCF关于邦定的技术，对于其他涉及到的技术不做探讨，由于Binding这部分东西要和其他很多相关技术共同使用，而且涉及到很多WCF中的高级操作，在其他的文章中会逐步提到，这里我们只关心邦定就可以了。

Demo1：二进制邦定通过http

IHelloIndigoService 代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;

namespace  WcfServiceLibrary2
{
    [ServiceContract(Namespace = " http://cnblogs.com/charlesliu " )]
     public   interface  IHelloIndigoService
    {
        [OperationContract]
         string  HelloIndigo( string  inputString);
    }
}

 

HelloIndigoService 代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;

namespace  WcfServiceLibrary2
{
     public   class  HelloIndigoService : IHelloIndigoService
    {
         public   string  HelloIndigo( string  inputString)
        {
             return  inputString;
        }
    }
}

 

App.config 代码

<? xml version="1.0" encoding="utf-8"  ?>
< configuration >
   < system.web >
     < compilation  debug ="true"   />
   </ system.web >
   <!--  When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries.  -->
   < system.serviceModel >
     < client  />
     < services >
       < service  behaviorConfiguration ="WcfServiceLibrary2.Service1Behavior"
        name ="WcfServiceLibrary2.HelloIndigoService" >
         < endpoint  address =""   binding ="customBinding"   contract ="WcfServiceLibrary2.IHelloIndigoService"   bindingConfiguration ="binaryOverHttp" >
           < identity >
             < dns  value ="localhost"   />
           </ identity >
         </ endpoint >
         < endpoint  address ="mex"  binding ="mexHttpBinding"  contract ="IMetadataExchange"   />
         < host >
           < baseAddresses >
             < add  baseAddress ="http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary2/Service1/"   />
           </ baseAddresses >
         </ host >
       </ service >
     </ services >
     < bindings >
       < customBinding >
         < binding  name ="binaryOverHttp" >
           < transactionFlow  transactionProtocol ="WSAtomicTransactionOctober2004" />
           < reliableSession  ordered ="true" />
           < binaryMessageEncoding  />
           < httpTransport  />
         </ binding >
       </ customBinding >
     </ bindings >
     < behaviors >
       < serviceBehaviors >
         < behavior  name ="WcfServiceLibrary2.Service1Behavior" >
           <!--  To avoid disclosing metadata information, 
          set the value below to false and remove the metadata endpoint above before deployment  -->
           < serviceMetadata  httpGetEnabled ="True" />
           <!--  To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information  -->
           < serviceDebug  includeExceptionDetailInFaults ="False"   />
         </ behavior >
       </ serviceBehaviors >
     </ behaviors >
   </ system.serviceModel >
</ configuration >

上面这个Demo和以前的Demo的代码没有什么区别，唯一的不同是在config文件里，加亮的位置体现出了自定义邦定的方法。

 

Demo2：（Stream流的binding）

IMediaManagerService代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;

namespace  WcfServiceLibrary3
{
    [ServiceContract]
     public   interface  IMediaManagerService
    {
        [OperationContract]
         string [] GetMediaList();
    }
}

 

IMediaStreaming代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;
using  System.IO;

namespace  WcfServiceLibrary3
{
    [ServiceContract]
     public   interface  IMediaStreaming
    {
        [OperationContract]
        Stream GetMediaStream( string  media);
    }
}

 

MediaMangerService 代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;
using  System.IO;

namespace  WcfServiceLibrary3
{
     public   class  MediaMangerService : IMediaStreaming, IMediaManagerService
    {
         public   string [] GetMediaList()
        {
             string [] mediaList  =   new   string [ 1 ];
            mediaList[ 0 ]  =   " WebCast20071101_Video.wmv " ;

             return  mediaList;
        }

         public  Stream GetMediaStream( string  media)
        {
             string  mediaFile  =  String.Format( " {0}\\{1} " , System.Configuration.ConfigurationSettings.AppSettings[ " mediaPath " ], media);

            FileInfo fi  =   new  FileInfo(mediaFile);

             if  ( ! fi.Exists)
                 throw   new  FileNotFoundException( " File does not exist: {0}. Check host configuration for 'mediaPath' setting. " , media);

            TraceStream traceStream  =   null ;
            FileStream fs  =   null ;
             try
            {
                fs  =   new  FileStream(mediaFile, FileMode.Open, FileAccess.Read, FileShare.Read);
                traceStream  =   new  TraceStream(fs);
            }
             catch
            {
                 if  (fs  !=   null )
                    fs.Close();
            }

             return  traceStream;
        }
    }
}

 

TraceStream代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.Diagnostics;
using  System.IO;

namespace  WcfServiceLibrary3
{
     public   class  TraceStream : Stream
    {
        System.IO.Stream m_in  =   null ;
        System.IO.Stream m_out  =   null ;

         public   override   bool  CanRead
        {
             get
            {
                Trace.WriteLine( " TraceStream " , String.Format( " get_CanRead: {0} " , m_in.CanRead));
                 return  m_in.CanRead;
            }
        }

         public   override   bool  CanSeek
        {
             get
            {
                Trace.WriteLine( " TraceStream " , String.Format( " get_CanSeek: {0} " , m_in.CanSeek));
                 return  m_in.CanSeek;
            }
        }

         public   override   bool  CanWrite
        {
             get
            {
                Trace.WriteLine( " TraceStream " , String.Format( " get_CanWrite: {0} " , m_in.CanWrite));
                 return  m_in.CanWrite;
            }
        }

         public   override   long  Length
        {
             get
            {
                Trace.WriteLine( " TraceStream " , String.Format( " get_Length: {0} " , m_in.Length));
                 return  m_in.Length;
            }
        }

         public   override   void  SetLength(
             long  val
            )
        {
            Trace.WriteLine( " TraceStream " , String.Format( " SetLength({0}) " , val));
            m_in.SetLength(val);
        }

         public   override   long  Position
        {
             get
            {
                Trace.WriteLine( " TraceStream " , String.Format( " get_Position: {0} " , m_in.Position));
                 return  m_in.Position;
            }
             set
            {
                Trace.WriteLine( " TraceStream " , String.Format( " set_Position: {0} " , m_in.Position));
                m_in.Position  =  value;
            }
        }

         public  TraceStream(System.IO.Stream stream)
        {
            Trace.WriteLine( " TraceStream " , String.Format( " TraceStream created. " ));
            m_in  =  stream;
        }

         public   override  IAsyncResult BeginRead(
             byte [] buffer,
             int  offset,
             int  count,
            AsyncCallback callback,
             object  state
            )
        {
            Trace.WriteLine( " TraceStream " , String.Format( " BeginRead(): offset({0}), count({1}) " , offset, count));
             return  m_in.BeginRead(buffer, offset, count, callback, state);
        }

         public   override  IAsyncResult BeginWrite(
             byte [] buffer,
             int  offset,
             int  count,
            AsyncCallback callback,
             object  state
            )
        {
            Trace.WriteLine( " TraceStream " , String.Format( " BeginWrite(): offset({0}), count({1}) " , offset, count));
             return  m_in.BeginWrite(buffer, offset, count, callback, state);
        }

         public   override   void  Close()
        {
            Trace.WriteLine( " TraceStream " , String.Format( " Close() " ));
            m_in.Close();
        }

         public   override   int  EndRead(
            IAsyncResult asyncResult
            )
        {
            Trace.WriteLine( " TraceStream " ,  " EndRead() " );
             return  m_in.EndRead(asyncResult);
        }

         public   override   void  EndWrite(
            IAsyncResult asyncResult
            )
        {
            Trace.WriteLine( " TraceStream " ,  " EndWrite() " );
            m_in.EndWrite(asyncResult);
        }


         public   override   void  Flush()
        {
            Trace.WriteLine( " TraceStream " ,  " Flush() " );
            m_in.Flush();
        }


         public   override   long  Seek(
             long  offset,
            SeekOrigin origin
            )
        {
            Trace.WriteLine( " TraceStream " , String.Format( " Seek(): offset({0}), origin({1}) " , offset, origin));
             return  m_in.Seek(offset, origin);
        }


         public   override   int  Read( byte [] buffer,
                    int  offset,  int  count)
        {
            Trace.WriteLine( " TraceStream " , String.Format( " Read(): offset({0}), count({1}) " , offset, count));
             return  m_in.Read(buffer, offset, count);
        }

         public   override   void  Write(
             byte [] buffer,
             int  offset,
             int  count
            )
        {
            Trace.WriteLine( " TraceStream " , String.Format( " Write(): offset({0}), count({1}) " , offset, count));
            m_in.Write(buffer, offset, count);

        }

    }
}

 

App.config 代码

<? xml version="1.0" encoding="utf-8"  ?>
< configuration >
   < system.web >
     < compilation  debug ="true"   />
   </ system.web >
   < appSettings >
     < add  key ="mediaPath"  value ="D:\omps-liucha-01.Bak\WCF\5\WebCast20071101_Demo\Streaming_WithTrace"   />
   </ appSettings >
   <!--  When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries.  -->
   < system.serviceModel >
     < services >
       < service  behaviorConfiguration ="WcfServiceLibrary3.Service1Behavior"
        name ="WcfServiceLibrary3.MediaMangerService" >
         < endpoint  address ="MediaManager"  binding ="basicHttpBinding"  contract ="WcfServiceLibrary3.IMediaManagerService"   />
         <!-- <endpoint address="MediaStream" contract="WcfServiceLibrary3.IMediaStreaming" binding="basicHttpBinding" bindingConfiguration="basicHttpStreaming"/> -->
         < endpoint  address ="MediaStream"  contract ="WcfServiceLibrary3.IMediaStreaming"  binding ="netTcpBinding"  bindingConfiguration ="netTcpStreaming" />
         < endpoint  address ="mex"  binding ="mexHttpBinding"  contract ="IMetadataExchange"   />
         < host >
           < baseAddresses >
             < add  baseAddress ="http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary3/Service1/"   />
             < add  baseAddress ="net.tcp://localhost:9000" />
           </ baseAddresses >
         </ host >
       </ service >
     </ services >
     < bindings >
       < netTcpBinding >
         < binding  name ="netTcpStreaming"  transferMode ="StreamedRequest"  maxReceivedMessageSize ="40000000"  maxBufferSize ="4096"  sendTimeout ="00:00:15"   >
         </ binding >
       </ netTcpBinding >
       < basicHttpBinding >
         < binding  name ="basicHttpStreaming"  messageEncoding ="Mtom"  maxReceivedMessageSize ="40000000"  transferMode ="Streamed" >
         </ binding >
       </ basicHttpBinding >
     </ bindings >
     < behaviors >
       < serviceBehaviors >
         < behavior  name ="WcfServiceLibrary3.Service1Behavior" >
           <!--  To avoid disclosing metadata information, 
          set the value below to false and remove the metadata endpoint above before deployment  -->
           < serviceMetadata  httpGetEnabled ="True" />
           <!--  To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information  -->
           < serviceDebug  includeExceptionDetailInFaults ="False"   />
         </ behavior >
       </ serviceBehaviors >
     </ behaviors >
   </ system.serviceModel >
</ configuration >

上面这个Demo主要演示了流的邦定，大家可以重点关注一下Config文件里的highlight内容。

 

Demo3：WSDual 用于回调callback

MyService 代码

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

namespace  WcfServiceLibrary4
{
    [ServiceContract(Namespace  =   " http://cnblogs.cn/charlesliu " , CallbackContract  =   typeof (IHelloIndidoServiceCallback))]
     public   interface  IMyService
    {
        [OperationContract(IsOneWay  =   true )]
         void  HelloIndigo( string  message);

        [OperationContract]
         void  HelloIndigo2( string  message);
    }

     public   interface  IHelloIndidoServiceCallback
    {
        [OperationContract(IsOneWay  =   true )]
         void  HelloIndigoCallback( string  message);

        [OperationContract]
         void  HelloIndigoCallback2( string  message);
    }

    [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Reentrant)]
     public   class  MyService : IMyService
    {
         public   void  HelloIndigo( string  message)
        {
            IHelloIndidoServiceCallback callback  =  OperationContext.Current.GetCallbackChannel < IHelloIndidoServiceCallback > ();
            callback.HelloIndigoCallback(message);
        }

         public   void  HelloIndigo2( string  message)
        {
            IHelloIndidoServiceCallback callback  =  OperationContext.Current.GetCallbackChannel < IHelloIndidoServiceCallback > ();
            callback.HelloIndigoCallback2(message);
        }
    }
}

 

config 代码

<? xml version="1.0" encoding="utf-8"  ?>
< configuration >
   < system.web >
     < compilation  debug ="true"   />
   </ system.web >
   <!--  When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries.  -->
   < system.serviceModel >
     < services >
       < service  name ="WcfServiceLibrary4.MyService"  behaviorConfiguration ="WcfServiceLibrary4.Service1Behavior" >
         < host >
           < baseAddresses >
             < add  baseAddress  = "http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary4/Service1/"   />
           </ baseAddresses >
         </ host >
         <!--  Service Endpoints  -->
         <!--  Unless fully qualified, address is relative to base address supplied above  -->
         < endpoint  address  =""   binding ="wsDualHttpBinding"  contract ="WcfServiceLibrary4.IMyService" >
           <!--  
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
           -->
           < identity >
             < dns  value ="localhost" />
           </ identity >
         </ endpoint >
         <!--  Metadata Endpoints  -->
         <!--  The Metadata Exchange endpoint is used by the service to describe itself to clients.  -->  
         <!--  This endpoint does not use a secure binding and should be secured or removed before deployment  -->
         < endpoint  address ="mex"  binding ="mexHttpBinding"  contract ="IMetadataExchange" />
       </ service >
     </ services >
     < bindings >
       < wsDualHttpBinding >
         < binding  name ="wsDualUsername"  maxReceivedMessageSize ="100000"  transactionFlow ="true" >
           < readerQuotas  maxArrayLength ="100000"  maxStringContentLength ="100000" />
           < security >
             < message  clientCredentialType ="UserName" />
           </ security >
         </ binding >
       </ wsDualHttpBinding >
     </ bindings >
     < behaviors >
       < serviceBehaviors >
         < behavior  name ="WcfServiceLibrary4.Service1Behavior" >
           <!--  To avoid disclosing metadata information, 
          set the value below to false and remove the metadata endpoint above before deployment  -->
           < serviceMetadata  httpGetEnabled ="True" />
           <!--  To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information  -->
           < serviceDebug  includeExceptionDetailInFaults ="False"   />
           < serviceCredentials >
             < serviceCertificate  findValue ="RPKey"  storeLocation ="LocalMachine"  storeName ="My"  x509FindType ="FindBySubjectName" />
           </ serviceCredentials >
         </ behavior >
       </ serviceBehaviors >
     </ behaviors >
   </ system.serviceModel >
</ configuration >

 

client 代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.Threading;
using  System.ServiceModel;
using  ConsoleApplication1.MyServiceReference;

namespace  ConsoleApplication1
{
     class  Program : IMyServiceCallback
    {
         static   void  Main( string [] args)
        {
            Console.WriteLine( " Client running on thread {0} " , Thread.CurrentThread.GetHashCode());
            Console.WriteLine();

            Program p  =   new  Program();
            InstanceContext context  =   new  InstanceContext(p);
             using  (MyServiceReference.MyServiceClient proxy  =   new  ConsoleApplication1.MyServiceReference.MyServiceClient(context))
            {
                WSDualHttpBinding b  =  proxy.Endpoint.Binding  as  WSDualHttpBinding;
                b.ClientBaseAddress  =   new  Uri( " http://localhost:8100 " );

                 // Enter valid windows credentials here
                Console.WriteLine();
                Console.Write( " Enter username: " );
                 string  username  =  Console.ReadLine();
                Console.Write( " Enter password: " );
                Console.ForegroundColor  =  ConsoleColor.Black;
                 string  password  =  Console.ReadLine();
                Console.ForegroundColor  =  ConsoleColor.White;

                proxy.ClientCredentials.UserName.UserName  =  username;
                proxy.ClientCredentials.UserName.Password  =  password;

                Console.WriteLine();
                Console.WriteLine( " Calling HelloIndigo() - one-way " );
                proxy.HelloIndigo( " Hello from client. " );
                Console.WriteLine( " Returned from HelloIndigo() " );


                Console.WriteLine( " Calling HelloIndigo2() - not one-way " );
                proxy.HelloIndigo2( " Hello from client. " );
                Console.WriteLine( " Returned from HelloIndigo2() " );

                Console.ReadLine();
            }
        }

         public   void  HelloIndigoCallback( string  message)
        {
            Console.WriteLine( " HelloIndigoCallback on thread {0} - one-way " , Thread.CurrentThread.GetHashCode());
        }

         public   void  HelloIndigoCallback2( string  message)
        {
            Console.WriteLine( " HelloIndigoCallback2 on thread {0} - not one-way " , Thread.CurrentThread.GetHashCode());

        }
    }
}

对于WSDual邦定，有几点值得注意。CallbackContract的类名称在客户端会变，比如本例中的IHelloIndidoServiceCallback就变成了IMyServiceCallback。要想成功运行本例还要添加X509的证书，可以从http://www.dasblonde.net/downloads/code/CertificatesSetup.zip下载。WSDual的作用就是实现回调，客户端发送一个调用服务的方法的请求，服务器通过回调客户的方法，实际上也就是服务端调用了客户端的方法。同时这个Demo也展示了如何配置证书认证的配置方法。

 

Demo4：自定义邦定custombinding有配置文件实现

其实Demo1就是用自定义邦定来实现的，对一邦定使用时非常灵活，所以主要是掌握它的方法。

Service 代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Runtime.Serialization;
using  System.ServiceModel;
using  System.Text;

namespace  WcfServiceLibrary5
{
    [ServiceContract]
     public   interface  IMyService
    {
        [OperationContract]
         string  Hello( string  message);
    }

     public   class  MyService : IMyService
    {
         public   string  Hello( string  message)
        {
             return  message  +   "  Charles " ;
        }
    }
}

 

Config 代码

<? xml version="1.0" encoding="utf-8"  ?>
< configuration >
   < system.web >
     < compilation  debug ="true"   />
   </ system.web >
   <!--  When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries.  -->
   < system.serviceModel >
     < services >
       < service  name ="WcfServiceLibrary5.MyService"  behaviorConfiguration ="WcfServiceLibrary5.Service1Behavior" >
         < host >
           < baseAddresses >
             < add  baseAddress  = "http://localhost:8001"   />
           </ baseAddresses >
         </ host >
         <!--  Service Endpoints  -->
         <!--  Unless fully qualified, address is relative to base address supplied above  -->
         < endpoint  address  =""   binding ="customBinding"  contract ="WcfServiceLibrary5.IMyService"   bindingConfiguration ="customHttp" >
           <!--  
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
           -->
           < identity >
             < dns  value ="localhost" />
           </ identity >
         </ endpoint >
         <!--  Metadata Endpoints  -->
         <!--  The Metadata Exchange endpoint is used by the service to describe itself to clients.  -->
         <!--  This endpoint does not use a secure binding and should be secured or removed before deployment  -->
         < endpoint  address ="mex"  binding ="mexHttpBinding"  contract ="IMetadataExchange" />

       </ service >
     </ services >
    
     < bindings >
       < customBinding >
         < binding  name ="customHttp" >
           < transactionFlow  transactionProtocol ="WSAtomicTransactionOctober2004" />
           < reliableSession  ordered ="true" />
           < textMessageEncoding  messageVersion ="Soap12WSAddressing10"  writeEncoding ="utf-8" />
           < httpTransport  />
         </ binding >
       </ customBinding >
     </ bindings >

     < behaviors >
       < serviceBehaviors >
         < behavior  name ="WcfServiceLibrary5.Service1Behavior" >
           <!--  To avoid disclosing metadata information, 
          set the value below to false and remove the metadata endpoint above before deployment  -->
           < serviceMetadata  httpGetEnabled ="True" />
           <!--  To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information  -->
           < serviceDebug  includeExceptionDetailInFaults ="False"   />
         </ behavior >
       </ serviceBehaviors >
     </ behaviors >
   </ system.serviceModel >
</ configuration >

注意：<httpTransport />不是<httpsTransport />，搞了半天终于发现是这个问题。

 

Demo5：代码方式实现的邦定

Service 代码

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

namespace  Helloindigo
{
    [ServiceContract(Namespace = " http://cnbolgs.com/charles " )]
     public   interface  IHelloIndigoService
    {
        [OperationContract]
         string  HelloIndigo( string  messsage);
    }

     public   class  HelloIndigoService : IHelloIndigoService
    {
         public   string  HelloIndigo( string  messsage)
        {
             return  messsage  +   "  Charles " ;
        }
    }
}

 

Host 代码

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

namespace  Host
{
     class  Program
    {
         static   void  Main( string [] args)
        {
             using  (ServiceHost host  =   new  ServiceHost( typeof (HelloIndigoService),  new  Uri( " http://localhost:8000 " )))
            {
                BindingElementCollection elements  =   new  BindingElementCollection();
                elements.Add( new  TransactionFlowBindingElement(TransactionProtocol.WSAtomicTransactionOctober2004));
                elements.Add( new  ReliableSessionBindingElement( true ));
                elements.Add( new  TextMessageEncodingBindingElement(MessageVersion.Soap12WSAddressing10, Encoding.UTF8));
                elements.Add( new  HttpTransportBindingElement());

                CustomBinding binding  =   new  CustomBinding(elements);

                host.AddServiceEndpoint( typeof (IHelloIndigoService), binding,  " HelloIndigoService " );
                host.Open();

                Console.WriteLine();
                Console.WriteLine( " Press <ENTER> to terminate the host application " );
                Console.Read();
            }
        }
    }
}

 

 

Client 代码

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

namespace  Client
{
     class  Program
    {
         static   void  Main( string [] args)
        {
            BindingElementCollection elements  =   new  BindingElementCollection();
            elements.Add( new  TransactionFlowBindingElement(TransactionProtocol.WSAtomicTransactionOctober2004));
            elements.Add( new  ReliableSessionBindingElement( true ));
            elements.Add( new  TextMessageEncodingBindingElement(MessageVersion.Soap12WSAddressing10, Encoding.UTF8));
            elements.Add( new  HttpTransportBindingElement());

            CustomBinding binding  =   new  CustomBinding(elements);

            ChannelFactory < IHelloIndigoService >  factory  =   new  ChannelFactory < IHelloIndigoService > (binding,  " http://localhost:8000/HelloIndigoService " );
            IHelloIndigoService proxy  =   null ;

             try
            {
                proxy  =  factory.CreateChannel();

                 string  s  =  proxy.HelloIndigo( " Hello " );
                Console.WriteLine(s);
                Console.Read();

            }
             catch  (Exception ex)
            {
                Console.WriteLine(ex);
            }
             finally
            {
                ICommunicationObject obj  =  proxy  as  ICommunicationObject;
                 if  (obj  !=   null )
                {
                    obj.Close();
                }
            }
        }
    }

    [ServiceContract(Namespace  =   " http://cnbolgs.com/charles " )]
     public   interface  IHelloIndigoService
    {
        [OperationContract]
         string  HelloIndigo( string  messsage);
    }
}

这个Demo使用纯代码的方式实现邦定，但是相比之下用config的方式更简单更高效。

 

好，看了这么多的Demo大家对Binding应该有所了解了，下面把WCF Binding这部分总结讲解一下：

 

什么是绑定（Binding）？
• 绑定表示通讯信道（communication channel）的配置
• 绑定定义了客户端与服务端之间通讯的协议
– 传输协议
– 消息编码
– 安全性，可靠性消息与事务

1 Message Transmission Optimization Mechanism (MTOM)
2 Transmission Control Protocol (TCP)
3 Microsoft Message Queuing (MSMQ)

 

传输协议
• HTTP
• TCP
• 命名管道（Named Pipes）
• MSMQ
• 提供自定义协议的支持：UDP 或者 SMTP, 等等

消息编码
• Text
• MTOM
• Binary
• 能够提供自定义消息编码格式

其它的绑定协议
• 安全
–相互认证证书 (用于不同公司之间或是不同部门之间，提供一种相互的认证手段)
• X.509
–消息保护
• 可靠的消息
• 事务支持
• 能够使用自定义绑定协议进行扩展

 

信道（Channels）
• 信道栈在通讯的每个端点之间发送或者接收消息
– 客户端代理是从客户端绑定配置构建出来的信道
– ServiceHost根据服务绑定的配置，为每个端点暴露出信道的监听器
• 信道栈由绑定的元素组成

绑定元素
• 绑定（Binding）由绑定元素组成
• 每个绑定元素对于信道（channel）栈的某些部分进行配置
• 与端点（endpoint）相关
• 能够通过声明或在代码中对每个端点进行配置

 

选择绑定
• 标准绑定：
–预定义的绑定元素
– 为在HTTP, TCP, 命名管道或者MSMQ通讯上提供缺省设置
– 能够修改配置
• 自定义绑定：
– 完全自定义的绑定元素的集合
– 当标准绑定无法满足需求时使用

 

标准绑定
• BasicHttpBinding
• WSHttpBinding
• WSDualHttpBinding
• WSFederationHttpBinding
• NetNamedPipeBinding
• NetTcpBinding
• NetPeerTcpBinding
• NetMsmqBinding
• MsmqIntegrationBinding

 Web Service绑定
• BasicHttpBinding与SOAP 1.1兼容
• WSHttpBinding与带有WS*的SOAP 1.2兼容
• WSDualHttpBinding适用于在支持WS*的HTTP协议上的回调（无法进行互操作）
• WSFederationHttpBinding适用于联合安全与单点登陆（SSO）的场景

跨进程/主机绑定
• NetNamedPipeBinding用于进程内或者同主机的调用
• NetTcpBinding用于同主机或者跨主机的调用
• NetPeerTcpBinding用于同主机或者跨主机点对点消息

消息绑定
• NetMsmqBinding用于在MSMQ上可靠的，事务的并且持久的消息
• MsmqIntegrationBinding用于早期技术的MSMQ互操作

自定义标准绑定

 

代码

< system.serviceModel >
< services >
< service  name ="HelloIndigo.HelloIndigoService"   >
< endpoint  binding ="netTcpBinding"  bindingConfiguration ="netTcp"  contract ="HelloIndigo.IHelloIndigoService"   />
</ service >
</ services >
< bindings >
< netTcpBinding >
< binding  name ="netTcp"  maxReceivedMessageSize ="5000000" >
< security  mode ="Message" >
< message  clientCredentialType ="Windows" />
</ security >
</ binding >
</ netTcpBinding >
</ bindings >
</ system.serviceModel >

 

创建自定义绑定

代码

< system.serviceModel >
< services >
< service  name ="HelloIndigo.HelloIndigoService"   >
< endpoint  binding ="customBinding"
bindingConfiguration ="custom"
contract ="HelloIndigo.IHelloIndigoService"   />
</ service >
</ services >
< bindings >
< customBinding >
< binding  name ="custom" >
< security  authenticationMode ="SspiNegotiated" >
< localServiceSettings  detectReplays ="true"   />
</ security >
< textMessageEncoding  />
< httpTransport  maxReceivedMessageSize ="5000000"   />
</ binding >
</ customBinding >
</ bindings >
</ system.serviceModel >

 

（完）