使用ActionFilterAttribute进行重定向注意事项

1.分部视图方法不能添加该特性，会报子方法不能重定向操作的错误

2.必须用给filterContext.Result赋值的方法进行重定向，而不能用filterContext.HttpContext.Response.Redirect，

否则，该特性执行完成后，会继续执行Action和其他ActionFilterAttribute

示例代码如下：

 public class UserAuthenticationAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (filterContext == null || filterContext.HttpContext == null)
                return;

            HttpRequestBase request = filterContext.HttpContext.Request;
            if (request == null)
                return;

            var workContext = EngineContext.Current.Resolve<IWorkContext>();

            if(workContext.CurrentSISTUser==null)
            {
                filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new
                {
                    controller = "Account",
                    action = "Login"
                }));
                //filterContext.HttpContext.Response.Redirect("/Account/Login", true);
                return;
            }

        }
    }