ASP.NET MVC 6 handling errors based on HTTP status code

Question

I want to display different error messages for each status code e.g:

• 400 Bad Request
• 403 Forbidden
• 500 Internal Server Error
• 404 Not Fou

Answer 1

You could use the StatusCodePagesMiddleware for this. Following is an example:

public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
    app.UseStatusCodePagesWithReExecute("/StatusCodes/StatusCode{0}");

    app.UseMvcWithDefaultRoute();

Controller which handles the status code requests:

public class StatusCodesController : Controller
{
    public IActionResult StatusCode404()
    {
        return View(viewName: "NotFound"); // you have a view called NotFound.cshtml
    }

    ... more actions here to handle other status codes
}

Some Notes:

• Check other extension methods like UseStatusCodePagesWithRedirects and UseStatusCodePages for other capabilities.
• I tried having StatusCode as a query string in my example, but looks like this middleware doesn't handle query strings, but you can take a look at this code and fix this issue.