B\S备忘录30——权限的控制按钮思路，看清楚是思路。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ITOO.Library.Core.Memcache;
using ITOO.Authority.ViewModel;

namespace ITOO.AuthorityDoorLogon.Client.Filter
{
public class BtnAuthorityFilter : ActionFilterAttribute
{
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
List<ResourceViewModel> ResourceList = new List<ResourceViewModel>();
List<ResourceViewModel> btnList = new List<ResourceViewModel>();
string ControlBtnJS = "<script languge='javascript'>";

//1.获得登陆用户的角色信息
HttpCookie selfUserInfo = System.Web.HttpContext.Current.Request.Cookies.Get("selfUserInfo");
Dictionary<string, string> userInfoRoleId = (Dictionary<string, string>)MemcacheHelper.Get(selfUserInfo.Value);
string roleId = userInfoRoleId["RoleViewModelId"].ToString();

//2.如果角色信息不为空，根据角色id查询所拥有的资源
if (userInfoRoleId != null)
{
//从Memcache缓存中取该角色拥有的资源
ResourceList = (List<ResourceViewModel>)MemcacheHelper.Get(roleId);
}
else
{
return;
}

//3.获取当前进入的页面或模块资源的ID
string pageId = System.Web.HttpContext.Current.Request.Cookies.Get("clickPageId").Values.ToString();

//4.循环资源列表，获得当前页面下面的按钮
//如果获得的资源列表不为空
if (ResourceList.Count != 0)
{
//循环资源列表
for (int i = 0; i < ResourceList.Count; i++)
{
//如果这个资源的pid是点击的页面，并且类型是按钮，把他加入按钮list中（这里也可以根据pid查询数据库中的字段）
if (ResourceList[i].ResourcePId.ToString() == pageId && ResourceList[i].Type == "按钮")
{
btnList.Add(ResourceList[i]);
}
}
}
else
{
return;
}

//5.根据获得的按钮list编写返回页面的JS
for (int i = 0; i < btnList.Count; i++)
{
//获得按钮元素
ControlBtnJS+="var "+btnList[i].ResourceId+"=document.getElementsByName('"+btnList[i].ResourceName+"')";
//控制按钮的样式为显示
ControlBtnJS+=btnList[i].ResourceId+".display='inline'";
}

ControlBtnJS += "</script>";

//6.执行JS，使按钮显示
System.Web.HttpContext.Current.Response.Write(ControlBtnJS);

}
}
}