How can I implement global error handling in ASP.NET Core?

How can I implement global error handling in ASP.NET Core?

You can implement global error handling in ASP.NET Core by using middleware. You can create a custom middleware to catch exceptions and handle them appropriately.

What should I include in my custom middleware?

In your custom middleware, you should include logic to log the error, return a user-friendly error response, and possibly rethrow the exception if needed.

Can you show me a code example?

Sure! Here's a simple example:

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
            // Return a response
            context.Response.StatusCode = 500;
            await context.Response.WriteAsync("An unexpected error occurred.");
        }
    }
}

How do I register this middleware in my application?

You can register the middleware in the Configure method of your Startup class like this:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
    app.UseMiddleware<ErrorHandlingMiddleware>();
    // other middleware registrations
}