合同需要Duplex,但Binding'BasicHttpBinding'不支持它,或者没有正确配置以支持它

Question

我已经按照本教程构建了聊天应用程序.当我尝试添加我的服务的引用时,我收到以下错误:

合同需要Duplex,但Binding'BasicHttpBinding'不支持它,或者没有正确配置以支持它.

我的web.config如下:

<extensions>
  <bindingExtensions>
    <add name="pollingDuplex" type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement,System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
  </bindingExtensions>
</extensions>

<bindings>      
  <pollingDuplex>
    <binding name="chatPollingDuplex" duplexMode="MultipleMessagesPerPoll"/>
  </pollingDuplex>
</bindings>    

<services>      
  <service name="PrototypeSite.ChatService">        
    <endpoint address="" binding="pollingDuplex" bindingConfiguration="chatPollingDuplex" contract="PrototypeSite.ChatService" />
    <endpoint address="mex" binding="wsDualHttpBinding" contract="IMetadataExchange"/>
  </service>      
</services>

Answer 1

当我遇到这个错误时,它给我带来了很多痛苦,但解决方案很简单 - 在web.config中仔细检查服务名称.

无论您是否在同一Web组件中提供服务,您都必须包含服务的完整TypeName