Error Handling in ASP.NET MVC

by

Controller.OnException(ExceptionContext context). Override it.

protected override void OnException(ExceptionContext filterContext)
{
    // Bail if we can't do anything; app will crash.
    if (filterContext == null)
        return;
        // since we're handling this, log to elmah

    var ex = filterContext.Exception ?? new Exception("No further information exists.");
    LogException(ex);

    filterContext.ExceptionHandled = true;
    var data = new ErrorPresentation
        {
            ErrorMessage = HttpUtility.HtmlEncode(ex.Message),
            TheException = ex,
            ShowMessage = !(filterContext.Exception == null),
            ShowLink = false
        };
    filterContext.Result = View("ErrorPage", data);
}

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