What is handle 404 error in ASP.NET Core?

Question

What is handle 404 error in ASP.NET Core?

Sachin Singh · Answer

To handle any type of status code related error whether it is 400 status code or any other except 500 status code use UseStatusCodePagesWithReExecute Middleware. for 500 we use if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler( "/Home/Error" ); } for 400 or other status code use this app.UseStatusCodePagesWithReExecute( "/Home/HandleError/{0}" ); [Route( "/Home/HandleError/{code:int}" )] public IActionResult HandleError(int code ) { ViewData[ "ErrorMessage" ] = $ "Error occurred. The ErrorCode is: {code}" ; return View( "~/Views/Shared/HandleError.cshtml" ); }

Amit Mohanty · Answer

Check the below links https://dotnetblog.asphostportal.com/how-to-fix-404-error-in-asp-net-core-mvc/ https://www.infoworld.com/article/3545304/how-to-handle-404-errors-in-aspnet-core-mvc.html

Vishal Yelve · Answer

A simple solution is to check for the HTTP status code 404 in the response. If found, you can redirect the control to a page that exists. The following code snippet illustrates how you can write the necessary code in the Configure method of the Startup class to redirect to the home page if a 404 error has occurred. In Configure method of the startup class app.Use(async (context, next) => { await next(); if (context.Response.StatusCode == 404) { context.Request.Path = "/Home"; await next(); } }) Also please refer https://dotnetblog.asphostportal.com/how-to-fix-404-error-in-asp-net-core-mvc/ https://www.infoworld.com/article/3545304/how-to-handle-404-errors-in-aspnet-coremvc.html#:~:text=A%20simple%20solution%20is%20to,a%20404%20error%20has%20occurred.

Vishal Joshi · Answer

In a Definition manner, we can say that it is a middleware to directly throw an error to the end user instead it will check and respond to the end user accordingly.