protected void modify_Click(object sender, EventArgs e)
        {
            int id = Convert.ToInt32(Request.QueryString["id"]);
            string title = this.newsTitle.Text;
            string content = this.newsContent.Value;
            string sql = string.Format(@"updata news set n_title = '{0}',n_title = '{1}' where n_id = {2}", title,content,id);
            int num = db.NotQuery(sql);
            if (num > 0)
            {
                Response.Redirect("NewsManage.aspx");
            }
        }

 //执行不是查询的语句
        public int NotQuery(string s)
        {
            int num = 0;
            try
            {
                myConnection.Open();
                //string sql = string.Format(s);
                OleDbCommand myCommand = new OleDbCommand(s, myConnection);
                num = myCommand.ExecuteNonQuery();
                return num;
            }
            catch (Exception e)
            {
                e.ToString();
            }
            finally
            {
                myConnection.Close();
            }
            return num;

        }