CODEWITHSUNDEEP
asp.nethttpexception
Earlz
Earlz

Reputation: 63815

Possible to throw a 404 error within an ASP.Net page?

I was wondering if it's possible to throw a 404 error from within a page(code behind)? Or possibly even throw any other type of error page such as 408(timeout) or 401(authentication required)?

Note: I don't just want to have the page return a status code of 404, I want it to use the ASP.Net(or my CustomErrors) 404 error page.

Something like this in the code behind:

if(id>10){ //if id is greater than 10, then it doesn't exist here
  throw 404Error();
}

Upvotes: 29

Views: 34779

Answers (4)

djangofan
djangofan

Reputation: 29669

If your client is capable of hitting the PHP page so code is executed, it means that you didn't get a 404 (client side error, "path/file not found"), nor did you get any other sort of 400-class error, BUT you are instead actually getting what should be classified as a 500 error of some sort.

The HTTP spec uses file/path as synonyms. This comes from the old days of the internet when it was super common for webservers to expose directory browsing lists.

Upvotes: 0

George Filippakos
George Filippakos

Reputation: 16569

A much better way is:

// Throws a 404 Not found
Response.Clear();
Response.StatusCode = 404;
Response.End();

There is no need to throw an exception and the above works much better when using custom error pages in the Web.Config

Upvotes: 26

Pit J
Pit J

Reputation: 179

In regards of Page Load in ASP.NET WebForms needs some small workaround.

protected void Page_Load(object sender, EventArgs e)
{
    HttpNotFound();
}

private void HttpNotFound()
{
    Response.Clear();
    Response.StatusCode = 404;
    Response.End();
    HttpContext.Current.ApplicationInstance.CompleteRequest();
}

Upvotes: 3

Darin Dimitrov
Darin Dimitrov

Reputation: 1038720

You could throw an HttpException and set the corresponding status code:

throw new HttpException(404, "Not found");

It will also work with other status codes. Just a remark about the 401: as you probably know when ASP.NET MVC detects this code it automatically redirects you to the login page and getting a custom error page for the 401 status code could be a real PITA to implement.

Upvotes: 46

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