WCF 測試客戶端錯誤無法調用服務（通過 WCF 發送實體時）

Question

我有一個服務，除了一個返回list<Module>方法外，所有方法都可以正常工作

我的模塊類（一個實體）如下

[DataContract(IsReference = true)] //prevents Infinite loop
[KnownType(typeof(SubModule))]
public class ModuleMst 
{
    public ModuleMst ()
    { }

    [Key]
    [DataMember]
    public int moduleid { get; set; }

    [StringLength(100)]
    [DataMember]
    public string modulename { get; set; }

    [StringLength(1)]
    [DataMember]
    public string status { get; set; }

    [DataMember]
    public string crby { get; set; }

    [DataMember]
    public DateTime crdt { get; set; }

    [DataMember]
    public string modby { get; set; }

    [DataMember]
    public DateTime moddt { get; set; }

    //[DataMember]
    public virtual List<SubModule> SubModules { get; set; }

}

異常 WcfTestClient 顯示為

An error occurred while receiving the HTTP response to http://localhost:8888/ArchService/. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.

Server stack trace: 
   at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(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 IArchService.GetAllModules()
   at ArchServiceClient.GetAllModules()

Inner Exception:
The underlying connection was closed: An unexpected error occurred on a receive.
   at System.Net.HttpWebRequest.GetResponse()
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)

Inner Exception:
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)

Inner Exception:
An existing connection was forcibly closed by the remote host
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)

配置是

  <system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="LargeSettingsWS" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600">
          <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="None" />
        </binding>
      </wsHttpBinding>
      <netTcpBinding>
        <binding name="LargeSettingsTcp" maxBufferSize="524288" maxBufferPoolSize="524288" maxReceivedMessageSize="524288">
          <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport" >
            <transport clientCredentialType="Windows" />
            <message clientCredentialType="Windows" />
          </security>
        </binding>
      </netTcpBinding>
      <netNamedPipeBinding>
        <binding name="LargeSettingsPipe" maxBufferSize="524288" maxBufferPoolSize="524288" maxReceivedMessageSize="524288">
          <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport" />
        </binding>
      </netNamedPipeBinding>
    </bindings>
    <services>
      <service name="AppService.ArchService">
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://localhost:8808/ArchService" />
            <add baseAddress="net.pipe://localhost/ArchService/" />
            <add baseAddress="http://localhost:8888/ArchService/" />
          </baseAddresses>
        </host>
        <!-- Service Endpoints -->
        <!-- Unless fully qualified, address is relative to base address supplied above -->
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="LargeSettingsWS" contract="AppService.IArchService">

          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="" binding="netTcpBinding" bindingConfiguration="LargeSettingsTcp" name="netTcpEndPoint" contract="AppService.IArchService" listenUriMode="Explicit">
          <identity>
            <certificateReference storeName="My" storeLocation="LocalMachine" x509FindType="FindBySubjectDistinguishedName" />
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="NetSvc" binding="netNamedPipeBinding" bindingConfiguration="LargeSettingsPipe" name="netPipeEndPoint" contract="AppService.IArchService" />

        <endpoint address="mex" binding="mexTcpBinding" name="MetadatEndpointTcp" contract="IMetadataExchange" endpointConfiguration="" />
        <endpoint address="mex" binding="mexNamedPipeBinding" name="MetadatEndpointNetPipe" contract="IMetadataExchange" />
        <endpoint address="mex" binding="mexHttpBinding" name="MetadatEndpointHttpDual" contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <dataContractSerializer maxItemsInObjectGraph="2147483646" />

          <serviceMetadata httpGetEnabled="True" httpsGetEnabled="True" />

          <serviceDebug includeExceptionDetailInFaults="True" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

例外不是很有幫助。

此外，此特定方法的所有綁定均失敗。

我錯過了什么 ？

編輯

似乎任何嘗試返回列表（其中 T 可以是任何實體）的方法都失敗並顯示錯誤An existing connection was forcibly closed by the remote host

編輯

客戶端配置如下

<bindings>
  <netNamedPipeBinding>
    <binding name="netPipeEndPoint" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600" >
      <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
      <security mode="Transport" />
    </binding>
  </netNamedPipeBinding>
  <netTcpBinding>
    <binding name="netTcpEndPoint" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600">
      <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
      <security mode="Transport" />
    </binding>
  </netTcpBinding>

  <wsHttpBinding>
    <binding name="WSHttpBinding_IArchService" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600">
      <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
      <security mode="None" />
    </binding>
  </wsHttpBinding>
</bindings>




<client>
  <endpoint address="http://localhost:8888/ArchService/" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IArchService" contract="ServiceReference.IArchService" name="WSHttpBinding_IArchService">
    <identity>
      <dns value="localhost" />
    </identity>
  </endpoint>
  <endpoint address="net.tcp://localhost:8808/ArchService" binding="netTcpBinding" bindingConfiguration="netTcpEndPoint" contract="ServiceReference.IArchService" name="netTcpEndPoint">
    <identity>
      <dns value="localhost" />
    </identity>
  </endpoint>
  <endpoint address="net.pipe://localhost/ArchService/NetSvc" binding="netNamedPipeBinding" bindingConfiguration="netPipeEndPoint" contract="ServiceReference.IArchService" name="netPipeEndPoint">
    <identity>
      <userPrincipalName value="SYS1\deb" />
    </identity>
  </endpoint>
</client>

編輯 3

我的其他相關實體類導致錯誤。 我不知道為什么。 他們在這里

[Table("SubModuleMst", Schema = "setp")]
[DataContract(IsReference = true)] //prevents Infinite loop
[KnownType(typeof(ModuleMst))]
[KnownType(typeof(List<PageMst>))]

public class SubModule
{
    public SubModule()
    { }

    #region SubModule

    [Key]
    [DataMember]
    public int submoduleid { get; set; }
     [DataMember]
    public int moduleid { get; set; }
    [DataMember]
    [StringLength(100)]
    public string submodulename { get; set; }
    [DataMember]
    public int orderno { get; set; }
    [DataMember]
    [StringLength(1)]
    public string status { get; set; }
    [DataMember]
    public string crby { get; set; }
    [DataMember]
    public DateTime crdt { get; set; }
    [DataMember]
    public string modby { get; set; }
    [DataMember]
    public DateTime moddt { get; set; }
    #endregion

    [DataMember]
    public virtual ModuleMst Module { get; set; }
    [DataMember]
    public virtual List<PageMst> Pages { get; set; }
}

[Table("PageMst", Schema = "setp")]
[DataContract(IsReference = true)] //prevents Infinite loop
[KnownType(typeof(SubModule))]
public class PageMst
{
    public PageMst()
    { }

    #region PageMst

    [Key]
    [DataMember]
    public int pageid { get; set; }
    [DataMember]
    [Required]
    [ForeignKey("SubModule")]
    public int submoduleid { get; set; }
    [DataMember]
    [StringLength(1000)]
    [Required]
    public string pagename { get; set; }
    [DataMember]
    [StringLength(1000)]
    public string pageurl { get; set; }
    [DataMember]
    public int orderno { get; set; }
    [DataMember]
    [StringLength(1)]
    public string menuitm { get; set; }
    [DataMember]
    public int rptparentid { get; set; }
    [DataMember]
    [StringLength(1)]
    public string alertflag { get; set; }
    [DataMember]
    [StringLength(1)]
    public string status { get; set; }
    [DataMember]
    public string crby { get; set; }
    [DataMember]
    public DateTime crdt { get; set; }
    [DataMember]
    public string modby { get; set; }
    [DataMember]
    public DateTime moddt { get; set; }
    [DataMember]
    [StringLength(200)]
    public string paramids { get; set; }
    [DataMember]
    [StringLength(500)]
    public string repurl { get; set; }
    #endregion

    [DataMember]
    public virtual SubModule SubModule { get; set; }
}

編輯 4

現在我確認錯誤是由於EF 創建的代理不可序列化，因此根據這篇 MSDN 文章https://msdn.microsoft.com/en-us/library/ee705457(v=vs.100)。 aspx並且也根據這個 SO 文章

Answer 1

由於沒有人回答我的問題，我在這里發布了我為使其工作所做的工作，希望它能幫助像我這樣的其他人。

事實證明， 根據此 MSDN 文章，Windows Communication Foundation (WCF) 無法直接序列化或反序列化 POCO 代理類型。

這是因為 EF 在實體跟蹤的 POCO 周圍創建了一個 Wrapper，它與 POCO 類不是同一個類，因此 WCF 無法序列化它，因為它只能序列化已知類型。

因此，為了通過WCF使實體可Serializable ，需要執行以下操作之一。

1. 在DBContext配置中禁用代理創建。 （見這個）
2. 使用.AsNoTracking() （請參閱此 SO 帖子）
3. 使用屬性來裝飾使用ProxyDataContractResolver返回實體的服務方法（有關演練，請參閱上面的 MSDN 文章）

我使用了第三種方法，我的服務最終返回了 POCO 實體。 演練文章中的代碼是不言自明的，因此不在此處發布。

最后，我認為 DTO 是考慮 EF 的最佳方式。