c# - 服务器未提供有意义的回复，这可能是由于契约(Contract)不匹配、 session 过早关闭或内部服务器错误造成的

Question

我有一个客户端/服务器应用程序，我正在尝试使用我创建的 WCF 服务，但它一直抛出异常，我没能弄清楚!!

这是 WCF 服务器的代码:

<configuration>
  <system.serviceModel>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true">
      <services>
        <service name="ChatService.ChatService"
             behaviorConfiguration="behaviorConfig">

          <host>
            <baseAddresses>
              <add baseAddress="net.tcp://localhost:7997/Host/"/>
              <add baseAddress="http://localhost:7998/Host/"/>
            </baseAddresses>
          </host>
          <endpoint address="tcp"
                binding="netTcpBinding"
                bindingConfiguration="tcpBinding"
                contract="ChatService.IChat"/>

          <endpoint address="net.tcp://localhost:7996/Host/mex"
                binding="mexTcpBinding"
                contract="IMetadataExchange"/>
        </service>
      </services>
    </serviceHostingEnvironment>
    <behaviors>
      <serviceBehaviors>
        <behavior name="behaviorConfig">
          <serviceMetadata httpGetEnabled="true" httpGetUrl=""/>
          <serviceDebug includeExceptionDetailInFaults="false"/>
          <serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="100"/>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <netTcpBinding>
        <binding name="tcpBinding"
                         maxBufferSize="67108864"
                         maxReceivedMessageSize="67108864"
                         maxBufferPoolSize="67108864"
                         transferMode="Buffered"
                         closeTimeout="00:00:10"
                         openTimeout="00:00:10"
                         receiveTimeout="00:20:00"
                         sendTimeout="00:01:00"
                         maxConnections="100">
          <security mode="None">
          </security>
          <readerQuotas maxArrayLength="67108864"
                                  maxBytesPerRead="67108864"
                                  maxStringContentLength="67108864"/>
          <reliableSession enabled="true" inactivityTimeout="00:20:00"/>
        </binding>
      </netTcpBinding>
    </bindings>

  </system.serviceModel>
  </configuration>

这是客户端的 WCF 服务:

<configuration>
    <connectionStrings>
        <add name="IClient.Properties.Settings.Co_WorkersDataBaseConnectionString"
            connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\Co-WorkersDataBase.mdb"
            providerName="System.Data.OleDb" />
    </connectionStrings>
  <system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="NetTcpBinding_IChat" closeTimeout="00:01:00" openTimeout="00:01:00"
            receiveTimeout="00:10:00" sendTimeout="00:01:00" transactionFlow="false"
            transferMode="Buffered" transactionProtocol="OleTransactions"
            hostNameComparisonMode="StrongWildcard" listenBacklog="10"
            maxBufferPoolSize="67108864" maxBufferSize="67108864" maxConnections="100"
            maxReceivedMessageSize="67108864">
          <readerQuotas maxDepth="32" maxStringContentLength="67108864" maxArrayLength="67108864"
              maxBytesPerRead="67108864" maxNameTableCharCount="16384" />
          <reliableSession ordered="true" inactivityTimeout="20:00:10"
              enabled="true" />
          <security mode="None">
            <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />
            <message clientCredentialType="Windows" />
          </security>
        </binding>
      </netTcpBinding>
    </bindings>
    <client>
      <endpoint address="net.tcp://localhost:7997/Host/tcp" binding="netTcpBinding"
          bindingConfiguration="NetTcpBinding_IChat" contract="CHATSERVICE.IChat"
          name="NetTcpBinding_IChat" />
    </client>
  </system.serviceModel>
</configuration>

我想做的是与服务器建立连接，但我得到的只是这个异常!!

The Server did not provide a meaningful reply , this might be caused by a contract mismatch, a premature session shutdown or an internal server error

Server stack trace: 
   at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeEndService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at IClient.CHATSERVICE.IChat.EndConnect(IAsyncResult result)
   at IClient.CHATSERVICE.ChatClient.EndConnect(IAsyncResult result) in C:\Users\Desktop\IClient\Service References\CHATSERVICE\Reference.cs:line 641
   at IClient.CHATSERVICE.ChatClient.OnEndConnect(IAsyncResult result) in C:\Users\Desktop\IClient\Service References\CHATSERVICE\Reference.cs:line 652
   at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)

PS:当我点击客户端应用程序的连接按钮时，我得到了这个异常，服务器与客户端应用程序同时运行。

请帮忙!!

Answer 1

服务器上没有安全性，但客户端上的客户端凭据类型窗口具有消息安全性 - 这些需要匹配。