请教！

Question

private Order order;
 
 protected void Page_Load(object sender, EventArgs e)
{   FaceControl(false);
 }
// Open
    protected void lkbOpen_Click(object sender, EventArgs e)
    {
        string errMsg = string.Empty;
        order = Order.GetOrderCodeByOrderCode("07061500001");        // 　给界面赋值
        txtOrderCode.Text = order.OrderCode.ToString();
        txtOrderDate.Text = order.OrderDate.ToString();
        txtQuantity.Text = order.Quantity.ToString();
        txtStyleCode.Text = order.StyleCode.ToString();
        txtRe.Text = order.Re.ToString();
 
    }
protected void lkbSave_Click(object sender, EventArgs e)
    {
        try
        {
            order.OrderCode = txtOrderCode.Text;
            order.OrderDate = txtOrderDate.Text;
            order.Quantity = int.Parse(txtQuantity.Text);
            order.StyleCode = txtStyleCode.Text;
            order.Re = txtRe.Text;            order.Save();            CleanTextBox();
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }为什么不能保存啊！实力化order 应该在什么时候？ 我是先打开一条记录，将其保存在类中变量，然后修改，保存

Answer 1

order.Save();
--------------------
Order的方法Save里是不是有问题便得保存失败?