How can I handle routing errors in ASP.NET Core?

How can I handle routing errors in ASP.NET Core?

In ASP.NET Core, you can handle routing errors by using middleware to catch exceptions and return appropriate responses.

Can you show me an example of middleware for this?

Sure! You can create a custom middleware like this:

public class ErrorHandlingMiddleware {
    private readonly RequestDelegate _next;

    public ErrorHandlingMiddleware(RequestDelegate next) {
        _next = next;
    }

    public async Task InvokeAsync(HttpContext context) {
        try {
            await _next(context);
        } catch (Exception ex) {
            // Log the error and return a response
            context.Response.StatusCode = 500;
            await context.Response.WriteAsync("An error occurred: " + ex.Message);
        }
    }
}

Don't forget to register it in the Configure method of Startup.cs!

What if I want to handle 404 errors specifically?

You can handle 404 errors by checking the status code in your middleware. If it's 404, you can return a custom message or view.

Thanks! Is there a way to log these errors?

Yes, you can use logging frameworks like Serilog or NLog to log errors in your middleware. Just inject an ILogger instance and log the exceptions.