How can I implement a global error filter in ASP.NET MVC?

How can I implement a global error filter in ASP.NET MVC?

To implement a global error filter in ASP.NET MVC, you can create a custom filter by inheriting from the ActionFilterAttribute class.

What methods do I need to override in my custom filter?

You should override the OnException method to handle exceptions globally. This method allows you to log errors or redirect users.

Can you show me a code example?

Sure! Here's a simple example:

public class GlobalErrorFilter : IExceptionFilter
{
    public void OnException(ExceptionContext filterContext)
    {
        // Log the exception
        // Redirect to an error page
        filterContext.Result = new ViewResult { ViewName = "Error" };
        filterContext.ExceptionHandled = true;
    }
}

Don't forget to register the filter in Global.asax!

How do I register the filter in Global.asax?

You can register the filter in the Application_Start method like this:

GlobalFilters.Filters.Add(new GlobalErrorFilter());