Question

I have come across a large issue that i am having that has suddenly come to light when i upgraded my Silverlight & Web Projects to versions 4 respectively.

Since doing this, all my WCF Services are Failing with the following Error message:

There was an error deserializing the object of type Anyboat.Admin.UserService.User. Unexpected end of file. Following elements are not closed: LastName, AuthenticateUserResult, AuthenticateUserResponse, Body, Envelope.

The StackTrace is:

   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeParameterPart(XmlDictionaryReader reader, PartInfo part, Boolean isRequest)
   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader, MessageVersion version, String action, MessageDescription messageDescription, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeBodyContents(Message message, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeReply(Message message, Object[] parameters)
   at System.ServiceModel.Dispatcher.ProxyOperationRuntime.AfterReply(ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
   at Anyboat.Admin.UserService.UserServiceClient.UserServiceClientChannel.EndAuthenticateUser(IAsyncResult result)
   at Anyboat.Admin.UserService.UserServiceClient.Anyboat.Admin.UserService.UserService.EndAuthenticateUser(IAsyncResult result)
   at Anyboat.Admin.UserService.UserServiceClient.OnEndAuthenticateUser(IAsyncResult result)
   at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)

I put a breakpoint in my SilverlightFaultBehaviour on the Response Message and this is the Envelope reponse i got back. Notice the Carriage return which is between *“\r\n”*

"<s:Envelope xmlns:a=\"http://www.w3.org/2005/08/addressing\" xmlns:s=\"http://www.w3.org/2003/05/soap-envelope\">\r\n  <s:Header>\r\n    <a:Action s:mustUnderstand=\"1\">urn:UserService/AuthenticateUserResponse</a:Action>\r\n    <a:RelatesTo>urn:uuid:07cc1361-c74c-4449-b423-e982d2ac8e05</a:RelatesTo>\r\n  </s:Header>\r\n  <s:Body>\r\n    <AuthenticateUserResponse>\r\n      <AuthenticateUserResult xmlns:d4p1=\"http://schemas.datacontract.org/2004/07/AnyBoat.Web.Classes.DataObjects\" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\">\r\n        <d4p1:Active>true</d4p1:Active>\r\n        <d4p1:EmailAddress>[e-mail]</d4p1:EmailAddress>\r\n        <d4p1:FirstName>Robbie</d4p1:FirstName>\r\n        <d4p1:IsAdministrator i:nil=\"true\" />\r\n        <d4p1:LastName>Tapping</d4p1:LastName>\r\n        <d4p1:Password>xxxxxxxxx</d4p1:Password>\r\n        <d4p1:UserID>2</d4p1:UserID>\r\n        <d4p1:UserName>robbietapping</d4p1:UserName>\r\n      </AuthenticateUserResult>\r\n    </AuthenticateUserR
esponse>\r\n  </s:Body>\r\n</s:Envelope>"

Can anyone tell me if there is away around this at all, i upgraded my VS2010 to SP1 where this has started to show itself.

Any Information or answers would be greatfully appreciated.

Thanks

EDIT

The Code that the Error Occurs on is:

 public Anyboat.Admin.UserService.User EndAuthenticateUser(System.IAsyncResult result) {
                object[] _args = new object[0];
                Anyboat.Admin.UserService.User _result = ((Anyboat.Admin.UserService.User)(base.EndInvoke("AuthenticateUser", _args, result)));
                return _result;
            }

Answer 1

Which serialization type do you use at services side? I’m pretty sure that you use some custom serialization. “\r\n” problem is pretty common and it occurs when you’re trying to deserialize not well formed xml received from service.
So I see two ways:

1. The most preferable way. Check the serializer at service side. It’s obvious that service returns xml in wrong format.
2. Add IClientMessageInspector to client and remove special symbols from response before deserialization.