WCF Stream 出现"this operation is not supported

Question

WCF服务类中有一个返回值类型为Stream的方法     [ServiceContract]    public interface  IDMADBQueryServices    {        [OperationContract]        Stream GetTopic(string topicID);     } 借口实现为： [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]    public class DMADBQueryService:IDMADBQueryServices    {         public Stream GetTopic(string topicID)        {            return new MemoryStream();        }    } 配置文件为：   <system.serviceModel>     <bindings>      <basicHttpBinding>        <binding name="bind1" maxReceivedMessageSize="90000000"   transferMode="Streamed" />      </basicHttpBinding>    </bindings>        <services>      <service behaviorConfiguration="DMADBQueryServices.Service1Behavior"        name="DMADBQueryServices.DMADBQueryService">        <endpoint address="" binding="basicHttpBinding" bindingConfiguration="bind1"          contract="DMADBQueryServices.IDMADBQueryServices" >          <identity>            <dns value="localhost" />          </identity>        </endpoint>        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"  />        <host>          <baseAddresses>            <add baseAddress="http://localhost:8732/Design_Time_Addresses/DMADBQueryServices/Service1/" />          </baseAddresses>        </host>      </service>    </services>        <behaviors>      <serviceBehaviors>        <behavior name="DMADBQueryServices.Service1Behavior">          <serviceMetadata httpGetEnabled="True"/>          <serviceDebug includeExceptionDetailInFaults="False" />        </behavior>        </serviceBehaviors>    </behaviors>   </system.serviceModel> 现在运行服务，在WCF TEST工具中这个方法显示：  this operation is not supported in the wcf test because it use type system.io.stream

Answer 1

你看看你用wcf test工具生成配置文件中 transferMode 的值是什么?

没有估计错的话,应该是 transferMode = "Buffered"

另外,采用非IIS宿主的wcf服务,不支持streamed.

Answer 2

大哥，是不是只有把WCF寄宿在IIS中，才能使用stream作为返回值，是吗？

其它的不行？