我有一个服务，除了返回list<Module>
我的模块类（实体）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; }
}
异常WcfTestClient显示为
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
<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>
异常不是很有帮助。
此外，所有绑定都会因此特定方法而失败。
我错过了什么？
修改
似乎任何尝试返回List（其中T可以是任何实体）的方法都失败，错误为An existing connection was forcibly closed by the remote host
修改
客户端配置如下
<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>
编辑3
我的其他相关实体类导致错误。我不知道为什么。他们是
[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; }
}
编辑4
现在我确认错误是由于由EF创建的代理服务器不可序列化根据此MSDN文章 https://msdn.microsoft.com/en-us/library/ee705457(v=vs.100).aspx 并且还根据this SO Article
答案 0 :(得分：1)
由于没有人回答我的问题，我在这里张贴我所做的工作，希望能帮助像我这样的其他人。
事实证明，Windows Communication Foundation（WCF）as per this MSDN Article无法直接序列化或反序列化POCO代理类型。
这是因为EF在POCO for Entity Tracking周围创建了一个Wrapper，它与POCO类不是同一类，因此WCF无法序列化它，因为它只能序列化已知的类型。
因此，为了使实体Serializable到WCF，需要完成以下任务之一。
DBContext配置中禁用代理创建。 （See this）.AsNoTracking()（See this SO Post）ProxyDataContractResolver返回实体的服务方法（参阅上面的MSDN文章了解演练）我使用了第3种方法，我的服务最终返回了POCO实体。演练文章中的代码是自解释的，因此不在此处发布。
最后我认为，就EF而言，DTO是最好的方式。