CustomErrors does not work when setting redirectMode=“ResponseRewrite”

Question

In a old site, I was changing the way that CustomErrors works by adding redirectMode=\"ResponseRewrite\" (new in 3.5 SP1):

Answer 1

I built an error page in aspx that transfers the query to an ASP.NET MVC controller. You can rewrite the query to this aspx page and it will transfer the query to your custom controller.

protected void Page_Load(object sender, EventArgs e)
{
  //Get status code
  var queryStatusCode = Request.QueryString.Get("code");
  int statusCode;
  if (!int.TryParse(queryStatusCode, out statusCode))
  {
    var lastError = Server.GetLastError();
    HttpException ex = lastError as HttpException;
    statusCode = ex == null ? 500 : ex.GetHttpCode();
  }
  Response.StatusCode = statusCode;

  // Execute a route
  RouteData routeData = new RouteData();
  string controllerName = Request.QueryString.Get("controller") ?? "Errors";
  routeData.Values.Add("controller", controllerName);
  routeData.Values.Add("action", Request.QueryString.Get("action") ?? "Index");

  var requestContext = new RequestContext(new HttpContextWrapper(Context), routeData);
  IController controller = ControllerBuilder.Current.GetControllerFactory().CreateController(requestContext, controllerName);
  controller.Execute(requestContext);
}

Find more details here : https://stackoverflow.com/a/27354140/143503