Determine result type in OnException of controller

Question

I'm working on an MVC.NET 2.0 project where I'm trying to put in some special error handling logic in the OnException method of the controller. Basically I want to be able to determine the result type of the controller method in which the unhandled exception was raised, so that I can return error data in a certain format dependent upon the type (json for JsonResult and html for ActionResult). Can anyone point me to a way to determine that type? I would greatly appreciate any help.

Thanks in advance

Patristic

Answer 1

Assuming you didn´t change the default routing:

protected override void OnException(ExceptionContext filterContext)
{
    var action = filterContext.RouteData.Values["action"].ToString();
    var type = filterContext.Controller.GetType();
    var method = type.GetMethod(action);
    var returnType = method.ReturnType;
    //...do whatever here...
}

Good luck!

Wiretap

Given two actions with the same name, such as Edit and Edit (one GET, one POST), this gives an AmbiguousMatchException. Is there a way to determine from the context which action was called? – Taxation

@Jim you can use type.GetMethods().Where(m=>m.Name.Equals(action)) in that case and obtain the right method by knowing the verb that was used in the current request and looking at the attributes of each method. – Wiretap