asp.net mvc中在Filter中跳转千万不要使用Response.Redirect

如题，如果在Filter中用Response.Redirect,虽然URL是跳转了，但是之后的Filter和Action还是会执行，不仅浪费资源，还会产生一些不必要的错误，或许，这些错误仅在你的错误日志中能看到。

在Filter中错误使用跳转如下：

public class AnchorFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
                if (!string.IsNullOrEmpty(filterContext.HttpContext.Request.QueryString["r_Anchor"]))
                {
                    filterContext.HttpContext.Response.Redirect(string.Format("{0}#{1}",
                                                                              filterContext.HttpContext.Request.Url.
                                                                                  AbsolutePath,
                                                                              filterContext.HttpContext.Request.
                                                                                  QueryString["r_Anchor"]));
                    return;
                }
         
           
            base.OnActionExecuting(filterContext);
        }
    }

filterContext.HttpContext.Response.Redirect (string.Format("{0}#{1}",
filterContext.HttpContext.Request.Url.
AbsolutePath,
filterContext.HttpContext.Request.
QueryString["r_Anchor"]));

filterContext.HttpContext.Response.Redirect 就会产生后遗症，正确使用应该是：

filterContext.Result = new RedirectResult(string.Format("{0}#{1}",
filterContext.HttpContext.Request.Url.
AbsolutePath,
filterContext.HttpContext.Request.
QueryString["r_Anchor"]));

正确代码：

public class AnchorFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
                if (!string.IsNullOrEmpty(filterContext.HttpContext.Request.QueryString["r_Anchor"]))
                {
                    filterContext.Result = new RedirectResult(string.Format("{0}#{1}",
                                                                              filterContext.HttpContext.Request.Url.
                                                                                  AbsolutePath,
                                                                              filterContext.HttpContext.Request.
                                                                                  QueryString["r_Anchor"]));
                    //filterContext.HttpContext.Response.Redirect(string.Format("{0}#{1}",
                    //                                                          filterContext.HttpContext.Request.Url.
                    //                                                              AbsolutePath,
                    //                                                          filterContext.HttpContext.Request.
                    //                                                              QueryString["r_Anchor"]));
                    return;
                }
           
           
            base.OnActionExecuting(filterContext);
        }
    }