如何使用WCF从客户端向服务器发送大文件？

Question

How to Send Large File From Client To Server Using WCF in C#? Below the configuration code.

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="HttpStreaming_IStreamingSample" 
                         maxReceivedMessageSize="67108864"
                          transferMode="Streamed">
            </binding>
        </basicHttpBinding>
    </bindings>
    <client>
        <endpoint 
            address="http://localhost:4127/StreamingSample.svc"
            binding="basicHttpBinding" 
            bindingConfiguration="HttpStreaming_IStreamingSample"
            contract="StreamingSample.IStreamingSample" 
            name="HttpStreaming_IStreamingSample" />
    </client>
</system.serviceModel>

Answer 1

You need to check out streaming, as Dzmitry already pointed out.

In order to be able to send large files as a stream to your service, you'll need to:

• create a service method that accepts a Stream as its input parameter
• create a binding configuration (on both the server and the client) which uses transferMode=StreamedRequest
• create a stream in your client and send it to the service method

So first off, you need a method in your service contract:

[ServiceContract]
interface IYourFileService
{
   [OperationContract]
   void UploadFile(Stream file)
}

Then you need a binding configuration:

<bindings>
  <basicHttpBinding>
    <binding name="FileUploadConfig"
             transferMode="StreamedRequest" />
  </basicHttpBinding>
</bindings>

and a service endpoint on your service using that binding configuration:

<services>
  <service name="FileUploadService">
     <endpoint name="UploadEndpoint"
               address="......."
               binding="basicHttpBinding"
               bindingConfiguration="FileUploadConfig"
               contract="IYourFileService" />
  </service>
</services>

and then, in your client, you need to open eg a filestream and send that to the service method without closing it.

Hope that helps!

Marc

Answer 2

您可以查看WCF流媒体功能。

Answer 3

In addition to increasing readerQuota settings (mentioned above) I had to also up the maxRequestLength inside the httpRuntime attribute.

<system.web>
    <httpRuntime maxRequestLength="2097151" />
</system.web>