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Hi All,

I have a WCF Service (Ex name: MyWCFService) which has all the database access and business logic mechanism, which is hosted in IIS using BasicHttpBinding. This WCF service is created by me. One of my collegue also created a WCF service called JasonProxyService which consumes MyWCFService, converts the result into Jason and gives it to UI, UI is using Ajax. The JasonProxyservice doesnt have configuration (like in web config it doesnt have elements <services>, <service> etc, which is unusual for me), and this JasonProxyservice has only two files .svc and svc.vb added to an asp.net application which has the UI also (the asp.net application has all the UI and ajax etc). There is no interface for contract, the ServiceContract attribute is defined right on top of the class and the methods in the class are defined with OperationContract attribute on top of them. When I tried to add interace and define it as service contract and put the WCF service configuration in the webconfig file, simply the Ajax isnt working. Then I left that option.
The reason for keeping JasonProxyService and UI in the same project is to avoid cross domain, becuase Ajax doesnt allow cross domain and our organization also not interested in cross domain because of security. The developer who wrote JasonProxyservice has left the project. Now it has come to my plate. This is what the problem is. I am really struggling with it for a while.
For solution, as first step I wrote logger to understand what is the problem, I am getting the below exception, and I am new to the json world. Please help me. Below is my exception, any help would be really helpfull.

XML

System.ServiceModel.ProtocolException: The content type text/html of the response message does not match the content type of the binding (text/xml; charset=utf-8). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly. The first 1024 bytes of the response were: '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
<title>500 - Internal server error.</title>
<style type="text/css">
<!--
body{margin:0;font-size:.7em;font-family:Verdana, Arial, Helvetica, sans-serif;background:#EEEEEE;}
fieldset{padding:0 15px 10px 15px;} 
h1{font-size:2.4em;margin:0;color:#FFF;}
h2{font-size:1.7em;margin:0;color:#CC0000;} 
h3{font-size:1.2em;margin:10px 0 0 0;color:#000000;} 
#header{width:96%;margin:0 0 0 0;padding:6px 2% 6px 2%;font-family:"trebuchet MS", Verdana, sans-serif;color:#FFF;
background-color:#555555;}
#content{margin:0 0 0 2%;position:relative;}
.content-container{background:#FFF;width:96%;margin-top:8px;padding:10px;position:relative;}
-->
</style>
</head>
<body>
<div id="header"><h1>Server Error</h1></div>
<div id="content">
 <div class="content-container"><fieldset>
 '. ---> System.Net.WebException: The remote server returned an error: (500) Internal Server Error.
   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.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException, ChannelBinding channelBinding)
   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 WA.LNI.StayAtWork.Public.Web.StayAtWorkServiceReference.IStayAtWorkService.SetContactInfo(UserInfo userInfo)
   at WA.LNI.StayAtWork.Public.Web.StayAtWorkServiceReference.StayAtWorkServiceClient.SetContactInfo(UserInfo userInfo) in D:\source\SourceCode\StayatWork-VS2010\WA.LNI.StayAtWork.Public.Web\WA.LNI.StayAtWork.Public.Web\Service References\StayAtWorkServiceReference\Reference.vb:line 2848
   at WA.LNI.StayAtWork.Public.Web.JSONProxyService.SetContactInfoJSON(UserInfo dto) in D:\source\SourceCode\StayatWork-VS2010\WA.LNI.StayAtWork.Public.Web\WA.LNI.StayAtWork.Public.Web\JSONProxyService.svc.vb:line 359

Thanks & Regards,

Abdul Aleem Mohammad
St Louis MO - USA

That's like finding a needle in the haystack. I would start the debugger up again and F9 the lines below,add some watches and step through the values.

D:\source\SourceCode\StayatWork-VS2010\WA.LNI.StayAtWork.Public.Web\WA.LNI.StayAtWork.Public.Web\Service References\StayAtWorkServiceReference\Reference.vb:line 2848

D:\source\SourceCode\StayatWork-VS2010\WA.LNI.StayAtWork.Public.Web\WA.LNI.StayAtWork.Public.Web\JSONProxyService.svc.vb:line 359

Hi jkirkerx,

I resolved it, actually it was another problem so it was throwing exception because of a field in the database is not matching to what I am sending.
So that exception was unable to be read by the jason application. So this error.

Thanks for your suggestion.

Thanks & Regards,

Abdul Aleem Mohammad
St Louis MO - USA

That's Great!

I get those to, but you have to start somewhere and check all the values before the exception is thrown. It's always the dumbest little thing.

Enjoy your weekend now