MVC用filter做权限过滤

分手后的思念是犯贱 2022-06-15 09:38 189阅读 0赞

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();  
        \}

这样就已经结束了，是不是很简单？