Question

What I am trying to accomplish is adding a GET method to my WCF REST based service and accessing it via the WebRequest class from a Silverlight 3 client application.

I am getting the error The remote server returned an error: NotFound. which, as I understand it, can be just a generic error for any 500 error encountered on the server.

WCF operation contract:

[OperationContract, WebGet(UriTemplate = "path/{id}")]
Stream Get(string id);

Operation implementation:

public Stream Get(string id)
{
    WebOperationContext.Current.OutgoingResponse.ContentType = "application/xml; charset=utf-8";

    return new MemoryStream(Encoding.UTF8.GetBytes("<xml><id>1</id><name>Some Name</name></xml>));
}

Client code that throws exception:

HttpWebRequest webRequest = WebRequest.CreateHttp("http://domain.com/my-service.svc/path/1");

webRequest.BeginGetResponse(
    x =>
    {
        try
        {
            using (WebResponse webResponse = webRequest.EndGetResponse(x)) <--Exception thrown here
            using (Stream stream = webResponse.GetResponseStream())
            {
               //do stuff here...eventually.
            }
        }
        catch (Exception ex)
        {
        }
    },
    null);

I suspect that it has something to do with the return type and have also tried returning XmlElement to no avail. I am really stumped here, any ideas what I might be doing wrong?

Note that I can successfully hit the method via Fiddler and a web browser.

Answer 1

Try putting the code below into your web.config file(change the file name in the initializeData attribute appropriately.

If you are using full IIS, and not Casini or IIS Express (I use the latter), make sure to put the log file somewhere where your web application has write permissions). This will cause WCF to generate a fairly detailed log file. I’ve found the log to be pretty handy.

<system.diagnostics>
  <sources>
    <source name="System.ServiceModel"
            switchValue="Information, ActivityTracing"
            propagateActivity="true">
      <listeners>
        <add name="traceListener"
            type="System.Diagnostics.XmlWriterTraceListener"
            initializeData= "c:\temp\WEBTraces.log" />
      </listeners>
    </source>
  </sources>
</system.diagnostics>