CODEWITHSUNDEEP
asp.net-coreasp.net-core-mvc
João J. Furtado Neto
João J. Furtado Neto

Reputation: 11

How to use IExceptionHandler in ASP.NET CORE MVC?

I'm having trouble using IExceptionHandler in my project.

Do I need to install any NuGet packages?

When I try to use, Visual Studio does not find the reference. He asks if I want to create an interface named IExceptionHandler.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace EventMotors.Controllers
{
    public class ErrorController : Controller
    {
        private readonly IExceptionHandler _exceptionHandler;

        public ErrorController(IExceptionHandler exceptionHandler)
        {
            _exceptionHandler = exceptionHandler;
        }
    }
}

Upvotes: 1

Views: 3156

Answers (2)

Hakan Fıstık
Hakan Fıstık

Reputation: 19421

IExceptionHandler interface was added in .NET 8.
Here is the blog post of anocconcuing it.
And here is another blog post explain it.

Here is a summary of the blog post

Multiple can be added, and they’ll be called in the order registered.
If an exception handler handles a request, it can return true to stop processing.
If an exception isn’t handled by any exception handler, then control falls back to the old behavior and options from the middleware.

Upvotes: 0

Nan Yu
Nan Yu

Reputation: 27538

IExceptionHandler is not in asp.net core . In error action , you can use IExceptionHandlerPathFeature to access the exception and the original request path in an error handler controller or page:

var exceptionHandlerPathFeature =
    HttpContext.Features.Get<IExceptionHandlerPathFeature>();
if (exceptionHandlerPathFeature?.Error is FileNotFoundException)
{
    ExceptionMessage = "File error thrown";
}
if (exceptionHandlerPathFeature?.Path == "/index")
{
    ExceptionMessage += " from home page";
}

Please refer to document :

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/error-handling?view=aspnetcore-3.1

Upvotes: 2

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