/// <summary>
 /// 获取角色列表
 /// </summary>
 public static List<M_Role> GetRoles()
 {
     if (Roles.Count == 0)
     {
         DataTable dt = new SystemDAL().GetRoles();
         List<M_Role> list = new List<M_Role>();
         foreach (DataRow dr in dt.Rows)
         {
             M_Role model = new M_Role();
             model.FillData(dr);
             list.Add(model);
         }
         Roles = list;
         return list;
     }
     return Roles;
 }
 /// <summary>
 /// 获取角色详情(权限明细)
 /// </summary>
 /// <param name="roleid"></param>
 /// <param name="agentid"></param>
 /// <returns></returns>
 public static M_Role GetRoleByID(string roleid)
 {
     M_Role model = null;
     DataSet ds = SystemDAL.BaseProvider.GetRoleByID(roleid);
     if (ds.Tables.Contains("Role") && ds.Tables["Role"].Rows.Count > 0)
     {
         model = new M_Role();
         model.FillData(ds.Tables["Role"].Rows[0]);
         model.Menus = new List<Menu>();
         foreach (DataRow dr in ds.Tables["Menus"].Rows)
         {
             Menu menu = new Menu();
             menu.FillData(dr);
             model.Menus.Add(menu);
         }
     }
     return model;
 }