RedirectToAction on NullReferenceException

Question

Is there a way of using RedirectToAction where getting "Object reference not set to an instance of an object." error?

public ActionResult Details()
{
    if(NullReferenceException == TRUE)
    {
    return RedirectToAction("Create");
    }
    else
    {
    return View("Details");
    }
}

I need only a hint not a working solution. Thanks for any help.

@JensKloster However exception handling mechanism is slightly heavy. So it would be more advisable to check if object is null and redirect if it is. Honestly, _I think_, that production code should not be handling `NullReferenceException` because it should not be thrown at all, unless something bad occurs. — Leri, Nov 16 '13 at 14:56

score 1 · Answer 1 · edited May 23 '17 at 10:25

1

This is what HandleError attribute (and functionality) exists for.

[HandleError]
public class YourController: Controller
{
    [HandleError] // or here
    public ActionResult YourAction()
    {
        // code
        return View();
    }
}

edited May 23 '17 at 10:25

Community

1
1

answered Nov 16 '13 at 14:54

Agat

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score 1 · Accepted Answer · answered Nov 16 '13 at 14:59

You can:

override OnException method inside the controller
use the HandleError attribute (can be configured per exception type)

small example using both:

    [HandleError(ExceptionType=typeof(NullReferenceException), View="Error")]
    public string Home(string name)
    {
        ...
    }

    protected override void OnException(ExceptionContext filterContext)
    {
        if (filterContext.ExceptionHandled)
        {
            return;
        }
        // do something
        base.OnException(filterContext);
    }

I don't develop with asp.net mvc, however I do lots of networking stuff with .NET and I bet handling `NullReferenceException` like that will become debugging nightmare one day. — Leri, Nov 16 '13 at 15:19

RedirectToAction on NullReferenceException

2 Answers2