protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                ConnectionStringSettings conn = new ConnectionStringSettings();
                conn.ConnectionString = "Server=shangwuPC;User ID=sa;Password=123";
                conn.Name = "shangwu";
                conn.ProviderName = "System.Data.SqlClient";
                ConfigurationManager.ConnectionStrings.Add(conn);
            }
        }