public ActionResult AddGroup(Web_UserGroup model)
        {
            ViewBag.ALLFunctions = new Web_Sys_FunctionBLL().GetAllFunctions(dbParm);
            try
            {
                string t = Request["FunctionId"].ToString();//获取选中的分类ID格式为("1,2,3”)不包含括号。
                List<Int32> idlist = new List<int>();
                if (!string.IsNullOrEmpty(t))
                {
                    if (t.Contains(","))
                    {
                        foreach (var each in t.Split(',').ToList())
                        {
                            idlist.Add(Convert.ToInt32(each));
                        }
                    }
                    else
                    {
                        idlist.Add(Convert.ToInt32(t));
                    }
                }
                IEnumerable<Web_Sys_Function> selectedFuncs = new Web_Sys_FunctionBLL().GetAllFunctions(dbParm).Where(p => idlist.Contains(p.ID));
                if (model.Group_ID == 0) //New
                {
                    model.Web_Sys_Functions = selectedFuncs.ToList();
                    //model.Web_Sys_Functions = new List<Web_Sys_Function>();
                    //selectedFuncs.ToList().ForEach(f => model.Web_Sys_Functions.Add(f));
                    groupBLL.AddNew(model, dbParm);
                }
                else                    //Edit
                {
                    List<Web_Sys_Function> originalFuncs = groupBLL.Get(model.Group_ID, dbParm).Web_Sys_Functions;
                    model.Web_Sys_Functions = originalFuncs;
                    //要删除的function
                    var dlist = originalFuncs.Where(p => !selectedFuncs.Contains(p)).ToList();
                    //要添加的function
                    var alist = selectedFuncs.Where(p => !originalFuncs.Contains(p)).ToList();
                    foreach (var item in dlist)
                    {
                        model.Web_Sys_Functions.Remove(item);
                    }
                    foreach (var item in alist)
                    {
                        model.Web_Sys_Functions.Add(item);
                    }
                    groupBLL.Update(model, dbParm);
                }

                ViewBag.ALLFunctions = new Web_Sys_FunctionBLL().GetAllFunctions(dbParm);
                return null;
                //return View();
            }
            catch (Exception ex)
            {
                var y = ex.InnerException;
                return View(model);
            }
        }