What is global exception handling in ASP.NET Core?

What is global exception handling in ASP.NET Core?

Global exception handling in ASP.NET Core allows you to manage errors in a centralized way, ensuring consistent error responses.

How can I implement it in my application?

You can implement it by using middleware to catch exceptions and return a standardized error response.

Can you show me a code example?

Sure! You can create a custom middleware like this:

public class ExceptionHandlingMiddleware {
    private readonly RequestDelegate _next;

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

    public async Task InvokeAsync(HttpContext context) {
        try {
            await _next(context);
        } catch (Exception ex) {
            await HandleExceptionAsync(context, ex);
        }
    }

    private Task HandleExceptionAsync(HttpContext context, Exception ex) {
        context.Response.ContentType = "application/json";
        context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
        return context.Response.WriteAsync(new ErrorDetails {
            StatusCode = context.Response.StatusCode,
            Message = "Internal Server Error."
        }.ToString());
    }
}

What are some common mistakes to avoid?

Common mistakes include not logging exceptions, failing to return meaningful error messages, and not handling specific exception types.