Question

I’m working on an ASP.NET MVC application and just getting to error handling. Help me solve the issue of getting the error message back to the user.

I have a controller:

    [AcceptVerbs(HttpVerbs.Get)]     public ActionResult Show(string callNumber)     {         ServiceCallService sc = new ServiceCallService();         return View(sc.GetServiceCallByCallNumber('', callNumber));     } 

a Service:

    public ServiceCall GetServiceCallByCallNumber(string custID, string callNumber)     {         ServiceCall sc = new ServiceCall();         sc = _serviceCallRepository.GetServiceCallByCallNumber(custID, callNumber);         return sc;     } 

a Repository:

    public ServiceCall GetServiceCallByCallNumber(string custID, string callNumber)     {         ServiceCall sc = new ServiceCall();          try         {             LoginToDB();             sc.CallNumber = '123';         }         catch (Exception e)         {             logger.error(Server.GetLastError());         }         finally         {             LogoutFromDB();         }         return sc;     } 

Let’s say there is a problem in the LoginToDB() method. I am logging the error but how do I get the error message back to the controller and then to the view.

Thanks.

Answer 1

The easiest way are:-

1) To use the build in model validation in ASP.NET MVC Release Canditate 1 (download from asp.net/mvc).

2) Re-throw the exception and catch it in your controller action then pass a nice customized error message to the View to render to the user – pass it using ViewData[‘error’] or something similar.