MVC用filter使用

MVC用filter做权限过滤:

1:创建filter类;类需要继承一个接口,并且重写4个方法;如下:
namespace MvcApplication1.Code
{
    public class paramFilter:System.Web.Mvc.ActionFilterAttribute
    {
        public override void OnActionExecuted(System.Web.Mvc.ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
        }

        public override void OnActionExecuting(System.Web.Mvc.ActionExecutingContext filterContext)
        {
           if(filterContext.HttpContext.Request.QueryString["k"]=="go")
           {
               string retUrl = filterContext.RouteData.GetRequiredString("controller") + "/" + filterContext.RouteData.GetRequiredString("action");
               filterContext.HttpContext.Response.Redirect("http://" + filterContext.HttpContext.Request.Url.Host + ":" + filterContext.HttpContext.Request.Url.Port.ToString() + "/" + retUrl);
           }
        }

        public override void OnResultExecuted(System.Web.Mvc.ResultExecutedContext filterContext)
        {
            base.OnResultExecuted(filterContext);
        }

        public override void OnResultExecuting(System.Web.Mvc.ResultExecutingContext filterContext)
        {
            base.OnResultExecuting(filterContext);
        }
    }
}

注意:其中 filterContext对象是 从页面传过来的。
获取页面controller值的方法是  filterContext.RouteData.GetRequiredString("controller")
获取页面action值的方法是: filterContext.RouteData.GetRequiredString("action")
转到其他页面的方法是:  filterContext.HttpContext.Response.Redirect()I
ip: filterContext.HttpContext.Request.Url.Host 
端口:filterContext.HttpContext.Request.Url.Port.ToString()


2:在需要过滤的controller上加上一句代码即可:
        [Code.paramFilter]
        public ActionResult Index()
        {
         
            return View();
        }

posted on 2012-07-26 15:11  张扬个性,敢为天下先  阅读(2889)  评论(2编辑  收藏  举报