[SOLVED] Displaying an HTML error page in ASP.NET Core

Displaying an HTML error page in ASP.NET Core

I would like to display an HTML error page when I catch a certain exception in my ASP.NET Core project. The page is stored in the project's root and I'm having trouble finding what I need to use in order to show this page. in this case, the application is already running and I would like the exception to be handled by redirecting the URL to the internally contained HTML page.

How do I do this?

Solution

If you want to execute custom error page,you could use UseStatusCodePagesWithReExecute and UseExceptionHandler middleware like below:

Controller:

public class ErrorController : Controller
{
    [Route("Error/{statusCode}")]
    public IActionResult StatusCodeError(int statusCode)
    {
        return Redirect("Index.html");  //Index.html located in wwwroot folder
    }
}

Startup.cs:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{

    app.UseStatusCodePagesWithReExecute("/Error/{0}");
    app.UseExceptionHandler("/Error/500");

    app.UseHttpsRedirection();
    app.UseStaticFiles();
   //...
}