How can I implement custom exception filters in ASP.NET Core?

How can I implement custom exception filters in ASP.NET Core?

To implement custom exception filters in ASP.NET Core, you can create a class that implements the IExceptionFilter interface.

Can you show me a simple example of a custom exception filter?

Sure! Here's a basic example:

public class CustomExceptionFilter : IExceptionFilter
{
    public void OnException(ExceptionContext context)
    {
        // Log the exception or handle it
        context.Result = new ObjectResult(new { error = context.Exception.Message })
        {
            StatusCode = 500
        };
        context.ExceptionHandled = true;
    }
}

How do I register this filter in my application?

You can register the filter in the Startup.cs file within the ConfigureServices method:

services.AddControllers(options =>
{
    options.Filters.Add<CustomExceptionFilter>();
});

What if I want to apply it globally?

To apply it globally, you can add it to the MVC options in the ConfigureServices method as shown above. This way, it will handle exceptions for all controllers.