Possible to throw a 404 error within an ASP.Net page?
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.
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();}