asp.net mvc how to return page not found from an action method edit button Edit

Murugan Andezuthu Dharmaratnam | calendar 30 September 2020 | 1418

In this post, we will look at how to handle asp .net 404 error in asp .net MVC application. Generally, a 404 error has to be returned if the URL does not match any route in the routing table or when a suitable controller is not found or controller action is not found. In my case, I wanted to return page not found exception when the parameter id is not found in the database. So I had to return a 404 error from my action method.

Solution: ASP.NET MVC 3

HttpNotFoundResult action result as introducted in asp .net MVC 3.0 which could be used to throw an exception from your code which can be done using HttpNotFound().

public ActionResult MyActionMethod()
    // Your code here 
    return HttpNotFound();

Solution: Prior to MVC 3

Prior to asp.net MVC 3 you had to raise an HttpException like in the code below.

throw new HttpException(404, "HTTP/1.1 404 Not Found");