2个一模一样的wcf。部署在2台服务器上。同时调用的时候，后调用的数据传递Stream为null。

代码:

[ServiceContract]     public interface IService1     {    

     [OperationContract]        

void UploadFile(FileUploadMessage request);   

  }    

[MessageContract]    

public class FileUploadMessage     {          

  // 文件在根目录下的子文件夹名            

[MessageHeader(MustUnderstand = true)]        

public string SavePath;        

   ///文件名           

   [MessageHeader(MustUnderstand = true)]      

   public string FileName; 

   ///文件内容             

  [MessageBodyMember(Order = 1)]      

   public Stream FileData;       

    }

   public class Service1 : IService1     {       

  public void UploadFile(FileUploadMessage request)         {         

               string uploadFolder = AppDomain.CurrentDomain.BaseDirectory;                 string savaPath = request.SavePath;         

               string fileName = request.FileName;         

        Stream sourceStream = request.FileData;            

     FileStream targetStream = null;             

    if (!savaPath.EndsWith("\\")) savaPath += "\\";                                                uploadFolder = uploadFolder + savaPath;

                // 路径是否存在                

if (!Directory.Exists(uploadFolder))               

  {                     Directory.CreateDirectory(uploadFolder);             

    }            

     string filePath = Path.Combine(uploadFolder, fileName);     

            using (targetStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))         

        {                     try                     {

                        const int bufferLen = 4096;                 

        byte[] buffer = new byte[bufferLen];                    

     int count = 0;                     

    while ((count = sourceStream.Read(buffer, 0, bufferLen)) > 0)                         {                             targetStream.Write(buffer, 0, count);                         }                         targetStream.Close();                  

       sourceStream.Close();                       

                  }                     catch (Exception e)                     {

                    }                 }                    }

配置文件：：

  <system.serviceModel>     <bindings>       <basicHttpBinding>         <binding name="TransferService"            sendTimeout="00:10:00"                  transferMode="Streamed"                  messageEncoding="Text"                  textEncoding="utf-8"                  maxReceivedMessageSize="9223372036854775807">          

          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"                maxArrayLength="2147483647" maxBytesPerRead="2147483647"                maxNameTableCharCount="2147483647"/>         </binding>       </basicHttpBinding>     </bindings>     <services>       <service behaviorConfiguration="DefaultBehavior" name="WebApplication1.Service1">         <endpoint address="" binding="basicHttpBinding"               bindingConfiguration="TransferService"               contract ="WebApplication1.IService1">         </endpoint>         <host>           <baseAddresses>             <add baseAddress="http://localhost:15246/Service1.svc" />           </baseAddresses>         </host>       </service>     </services>     <behaviors>       <serviceBehaviors>         <behavior name="DefaultBehavior">           <serviceMetadata httpGetEnabled="true" />           <serviceDebug includeExceptionDetailInFaults="true" />           <serviceThrottling maxConcurrentCalls="100" maxConcurrentInstances="100" maxConcurrentSessions="100"/>         </behavior>       </serviceBehaviors>     </behaviors>     <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />   </system.serviceModel>

上传文件:

//A服务器

  s1.Service1Client ser1 = new s1.Service1Client();         
                s1.FileUploadMessage f1 = new s1.FileUploadMessage();
                //文件的名称
                f1.FileName = FileUpload1.FileName;
                //路径
                f1.SavePath = "Product";
                //文件
                f1.FileData = FileUpload1.FileContent;
                // //上传文件
                s1.IService1 channel = ser1.ChannelFactory.CreateChannel();
                channel.UploadFile(f1);

//b服务器器

 s2.Service2Client ser2 = new s2.Service2Client();
           
                s2.FileUploadMessage f2 = new s2.FileUploadMessage();
                //文件的名称
                f2.FileName = FileUpload1.FileName;
                //路径
                f2.SavePath = "Product";
                //文件
                f2.FileData = FileUpload1.FileContent;
                // //上传文件
                s2.IService2 channel2 = ser2.ChannelFactory.CreateChannel();
                channel2.UploadFile(f2);

问题:b服务器的文件上传上去为空。后创建的对象传递过去的Stream为空。什么原因。