底层连接已关闭：连接意外关闭＃2

Question

在获取此错误之前进行的修改。我在所有课程中都更改了byte[]到Stream。

System.ServiceModel.CommunicationException: The underlying connection was closed: The connection was closed unexpectedly. ---> System.Net.WebException: The underlying connection was closed: The connection was closed unexpectedly.  
    at System.Net.HttpWebRequest.GetResponse()  
    at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout) 

    --- End of inner exception stack trace ---  

Server stack trace:  
    at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)  
    at System.ServiceModel.Channels.HttpChannelFactory.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.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)  
    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 MyWCFServiceTest.MyWCFService.ICommonService.UploadDocument(UploadDocumentRequest request)  
    at MyWCFServiceTest.MyWCFService.MyServiceClient.MyWCFServiceTest.MyWCFService.ICommonService.UploadDocument(UploadDocumentRequest request) in C:\Users\KishoreJangid\Desktop\ChangeSAPTransactionStatus\MyWCFServiceTest - Copy\MyWCFServiceTest\Service References\MyWCFService\Reference.cs:line 2376  
    at MyWCFServiceTest.MyWCFService.MyServiceClient.UploadDocument(RequestHeader UploadDocumentReqHdr, Byte[]& UploadDocumentContent) in C:\Users\KishoreJangid\Desktop\ChangeSAPTransactionStatus\MyWCFServiceTest - Copy\MyWCFServiceTest\Service References\MyWCFService\Reference.cs:line 2383  
    at MyWCFService.Form1.DocumentUpload_Click(Object sender, EventArgs e) in C:\Users\KishoreJangid\Desktop\ChangeSAPTransactionStatus\MyWCFServiceTest - Copy\MyWCFServiceTest\Form1.cs:line 88 

Answer 1

从你想达到什么样的由于缺乏解释，你有没有更新所有的消费者使用新的类？我认为你已经改变了数据合同，这打破了消费者。

如果不是，我会查看您要传输多少数据，请参考此blog post！似乎这是问题。

我有一些相同的问题，它可能是一个配置问题，或者如果您在IIS中托管，那么有关权限的问题，请尽可能详细说明。

Answer 2

如果您希望从被调用方法返回并使用WCF服务，那么此错误背后的一个可能原因可能是您的对象序列化/反序列化问题。如果你的服务方法返回一些不能序列化的东西，那么你的代理通道会产生这个错误。

为了避免这种情况，刚入住

1. 返回类型，并确保它是序列化。您可能必须将[Serializable]属性与您的课程相关联。
2. 有[DataMember(IsRequired=true)]，它告诉该值将在序列化时出现（它的下划线属性是非空值类型）。
3. 确保您的枚举值与存储在表格中的值匹配。这是非常关键的情况，因为你不期望它。