private void sys_model_nav_del(HttpContext context) { string _nav_id = context.Request.Form["nav_id"]; if (string.IsNullOrEmpty(_nav_id)) { context.Response.Write("{msg:0, msgbox:\"对不起,无法获得所要删除的菜单项!\"}"); return; } int nav_id; if (!int.TryParse(_nav_id, out nav_id)) { context.Response.Write("{msg:0, msgbox:\"对不起,数据在转换过程中发生错误!\"}"); return; } BLL.sys_model_nav bll = new BLL.sys_model_nav(); if (!bll.Exists(nav_id)) { context.Response.Write("{msg:0, msgbox:\"对不起,您所删除的菜单项不存在!\"}"); return; } bll.Delete(nav_id); context.Response.Write("{msg:1, msgbox:\"删除菜单项成功啦!\"}"); return; }