Filter：
 1     /// <summary> 2     /// 检测是否是手机访问 3     /// </summary> 4     public class IsMobileFilter : ActionFilterAttribute 5     { 6         public override void OnActionExecuting(ActionExecutingContext filterContext) 7         { 8             System.Web.HttpBrowserCapabilitiesBase myBrowserCaps = filterContext.HttpContext.Request.Browser; 9             bool flag = myBrowserCaps.IsMobileDevice;10             if (flag)11             {12                 string urls = "www.baidu.com";13                 if (!string.IsNullOrEmpty(urls))14                 {15                     urls = urls.Contains("http") ? urls.Trim() : "http://" + urls.Trim();16                     filterContext.Result = new RedirectResult(urls);17                 }18                 else19                 {20                     base.OnActionExecuting(filterContext);21                 }22             }23             else24             {25                 base.OnActionExecuting(filterContext);26             }27         }28     }

　　　　在FilterConfig中注册全局Filter　　　　

　　　　　　public static void RegisterGlobalFilters(GlobalFilterCollection filters)        　{            　　filters.Add(new IsMobileFilter());        　}