如何在ASP.NET MVC项目中处理HTTP404

public class CustomHandleErrorAttribute : HandleErrorAttribute
{
    public override void OnException(ExceptionContext filterContext)
    {
        if (filterContext.Exception is HttpException && ((HttpException)filterContext.Exception).GetHttpCode() == 404)
        {
            // 处理HTTP 404错误逻辑
            filterContext.Result = new ViewResult
            {
                ViewName = "NotFound",
                ViewData = filterContext.Controller.ViewData,
                TempData = filterContext.Controller.TempData
            };
            filterContext.ExceptionHandled = true;
        }
        else
        {
            base.OnException(filterContext);
        }
    }
}

public class FilterConfig
{
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new CustomHandleErrorAttribute());
    }
}