How to make custom WCF error handler return JSON response with non-OK http code?

Question

I\'m implementing a RESTful web service using WCF and the WebHttpBinding. Currently I\'m working on the error handling logic, implementing a custom error handler (IErrorHand

Answer 1

For those using web apps to call WFC, always return your JSON as a Stream. For errors, no need for a bunch of fancy/ugly code. Just change the http status code with:

System.ServiceModel.Web.WebOperationContext.Current.OutgoingResponse.StatusCode = System.Net.HttpStatusCode.InternalServerError

Then instead of throwing the exception, format that exception or a custom error object into JSON and return it as a System.IO.Stream.