public ActionResult DoNews(News objModel)//映射模型数据
        {
            //数据验证(客户端验证) MVC视图模型验证
            //调用BLL层进行数据处理
            objModel.PublishTime = DateTime.Now;//设置当前时间
            int result = 0;

            if (objModel.NewsId != 0)//修改操作
            {
                result = new BLL.NewsManager().ModifyNews(objModel);

                if (result > 0)
                {
                    return(Content("<script>alert('新闻修改成功!');location.href='" + Url.Action("NewsManager") + "';</script>"));
                }
                else
                {
                    return(Content("<script>alert('新闻修改失败!');location.href='" + Url.Action("NewsModify") + "';</script>"));
                }
            }
            else//新增操作
            {
                result = new BLL.NewsManager().PublishNews(objModel);
                if (result > 0)
                {
                    return(Content("<script>alert('新闻发布成功!');location.href='" + Url.Action("NewsPublish") + "';</script>"));
                }
                else
                {
                    return(Content("<script>alert('新闻发布失败!');location.href='" + Url.Action("NewsPublish") + "';</script>"));
                }
            }
        }
        public ActionResult DoDelNew(string newsId)//映射数据模型
        {
            //调用数据模型
            int result = new BLL.NewsManager().DelNews(newsId);

            if (result > 0)//删除成功
            {
                return(Content("<script>alert('删除成功!');location.herf='" + Url.Action("NewsManager") + "';</script>"));
            }
            else//删除失败
            {
                return(Content("<script>alert('删除失败!');location.herf='" + Url.Action("NewsManager") + "';</script>"));
            }
        }