通用权限管理系统菜单展示的一个技巧

从这篇文章，希望您能够了解吉日嘎拉通用权限管理系统菜单项配置、缓存及在前台的展示技巧。

项目中使用了吉日嘎拉的通用权限管理系统，几十个子系统均由该权限管理系统管理。

在系统中配置好相关菜单及非菜单项，配置截图：

菜单权限设置截图

通过下拉菜单进入其中的一个子系统

子系统中的菜单项（菜单项表示该项会在前端需要展示出来，用于用户点击的项目），其中的公开表示所有人均可看到该菜单项目。

子系统中的非菜单项（非菜单项表示该项目不需要在前端展示出来，比如有些在页面中的弹出窗口、按钮等项目）

通过单点登录到子系统以后，通过一个服务获取登录用户拥有的全部菜单，在权限基类页实现，所有需要进行权限判断的页面均集成此基类页。

代码实现如下图：AuthBasePage.cs基类页，可参考编写基类页

    public class AuthBasePage : BasePage    {        /// <summary>        /// 所有的权限菜单：包含菜单项、非菜单项（如程序中的弹出页、按钮等）        /// </summary>        PRotected string menuHtml = string.Empty;        /// <summary>        /// 获取所有菜单的方法 用缓存         /// 通过userInfo.OpenId来更新缓存  每次进入会重新获取一次菜单，        /// </summary>        /// <param name="userInfo"></param>        /// <returns></returns>        private string GetmenuHtml(BaseUserInfo userInfo, bool refreshFlag = false)        {            string cacheKey = "menuHtml_" + userInfo.OpenId;            if (refreshFlag)            {                HttpContext.Current.Cache.Remove(cacheKey);            }            if (HttpContext.Current.Cache[cacheKey] == null)            {                lock (this)                {                    if (HttpContext.Current.Cache[cacheKey] == null)                    {                         PermissionServiceSoapClient service = new PermissionServiceSoapClient();                        string systemCode = ZTOTransferFees.Foundation.ConfigHelper.GetConfigString("SystemCode");                        menuHtml = service.GetPermissionListByUser(systemCode, userInfo.Id);                        menuHtml = menuHtml.Replace("Id", "id").Replace("FullName", "name").Replace("NavigateUrl", "tabUrl").Replace("Parentid", "parentId").Replace(                                      "ImagUrl", "icon").Replace("/"Expand/":1", "open:true");                        HttpContext.Current.Cache.Add(cacheKey, menuHtml, null, DateTime.Now.AddMinutes(120), Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, null);                    }                }            }            return HttpContext.Current.Cache[cacheKey] as string;        }        protected override void OnInit(EventArgs e)        {            //判断是否得到身份认证 未认证或超时时弹出登录窗口而非跳转到登录页            if (null == HttpContext.Current.User.Identity || !HttpContext.Current.User.Identity.IsAuthenticated)            {                Response.Write("<script type=/"text/javascript/">");                Response.Write("var topWin = (function (p, c) {while (p != c) {c = p;p = p.parent}return c;})(window.parent, window);");                Response.Write("try{ topWin.openLoginWindow();}catch(e){window.location='/Login.aspx'}");                Response.Write("</script>");                Response.End();            }            HttpCookie authCookie = Context.Request.Cookies[FormsAuthentication.FormsCookieName];            FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);            userData = authTicket.UserData;            JavascriptSerializer javaScriptSerializer = new JavaScriptSerializer();            userInfo = javaScriptSerializer.Deserialize<BaseUserInfo>(userData);            userInfo.ServiceUserName = BaseSystemInfo.ServiceUserName;            userInfo.ServicePassWord = BaseSystemInfo.ServicePassword;            //获得全部菜单项、非菜单项的字符串（json）字符串            menuHtml = GetmenuHtml(userInfo);           //正在访问的页面，通过判断该页面是否在menuHtml中来进行权限判断，按钮等也一样            string curUrl = HttpContext.Current.Request.FilePath;            if (!menuHtml.Contains(curUrl))            {//权限管理员的联系方式               string authManagerInfo = ZTOTransferFees.Foundation.ConfigHelper.GetConfigString("authManagerInfo");               HttpContext.Current.Items["ErrorMessage"] = "对不起，您没有权限访问页面:" + curUrl + "<br/>如有疑问，请与权限分配人联系<br/>" + authManagerInfo;               HttpContext.Current.Server.Transfer("~/Prompt/ShowNoRigh.aspx");           }            base.OnInit(e);        }

在上面我们可以看到，通过服务已经获取了该用户所拥有的所有菜单及非菜单项目 menuHtml，menuHtml代码如下，是一个Json数组， 菜单项太多，折叠起来了。

  1 [  2     {  3         "id": 1000005,  4         "parentId": null,  5         "Code": "991810201",  6         "name": "报价维护",  7         "CategoryCode": null,  8         "ImageIndex": null,  9         "SelectedImageIndex": null, 10         "tabUrl": null, 11         "icon": "/system/libs/js/tree/ztree/img/diy/1_close.png", 12         "Target": "fraContent", 13         "FormName": null, 14         "AssemblyName": null, 15         "PermissionScopeTables": null, 16         "SortCode": 1000005, 17         "Enabled": 1, 18         "DeletionStateCode": 0, 19         "IsMenu": 1, 20         "IsPublic": 1, 21         "IsVisible": 1, 22         "IsScope": 0, 23         "LastCall": null, 24         "Expand": 0, 25         "AllowEdit": 1, 26         "AllowDelete": 1, 27         "Description": null, 28         "CreateOn": "/Date(1400819927000)/", 29         "CreateUserid": "102383", 30         "CreateBy": "宋彪", 31         "ModifiedOn": "/Date(1400830672000)/", 32         "ModifiedUserid": "102383", 33         "ModifiedBy": "宋彪" 34     }, 35     { 36         "id": 1000006, 37         "parentId": 1000005, 38         "Code": "99181020101", 39         "name": "报价查询", 40         "CategoryCode": null, 41         "ImageIndex": null, 42         "SelectedImageIndex": null, 43         "tabUrl": "/BaoJiaChaXun.aspx", 44         "icon": "/system/skin/titlebar_arrow.gif", 45         "Target": "fraContent", 46         "FormName": null, 47         "AssemblyName": null, 48         "PermissionScopeTables": null, 49         "SortCode": 1000006, 50         "Enabled": 1, 51         "DeletionStateCode": 0, 52         "IsMenu": 1, 53         "IsPublic": 1, 54         "IsVisible": 1, 55         "IsScope": 0, 56         "LastCall": null, 57         "Expand": 0, 58         "AllowEdit": 1, 59         "AllowDelete": 1, 60         "Description": null, 61         "CreateOn": "/Date(1400819973000)/", 62         "CreateUserid": "102383", 63         "CreateBy": "宋彪", 64         "ModifiedOn": "/Date(1400828358000)/", 65         "ModifiedUserid": "102383", 66         "ModifiedBy": "宋彪" 67     }, 68     { 69         "id": 1000008, 70         "parentId": null, 71         "Code": "991810202", 72         "name": "报价审核", 73         "CategoryCode": null, 74         "ImageIndex": null, 75         "SelectedImageIndex": null, 76         "tabUrl": null, 77         "icon": "/system/libs/js/tree/ztree/img/diy/2.png", 78         "Target": "fraContent", 79         "FormName": null, 80         "AssemblyName": null, 81         "PermissionScopeTables": null, 82         "SortCode": 1000008, 83         "Enabled": 1, 84         "DeletionStateCode": 0, 85         "IsMenu": 1, 86         "IsPublic": 1, 87         "IsVisible": 1, 88         "IsScope": 0, 89         "LastCall": null, 90         "Expand": 0, 91         "AllowEdit": 1, 92         "AllowDelete": 1, 93         "Description": null, 94         "CreateOn": "/Date(1400820277000)/", 95         "CreateUserid": "102383", 96         "CreateBy": "宋彪", 97         "ModifiedOn": "/Date(1400828373000)/", 98         "ModifiedUserid": "102383", 99         "M