可以'；t在codeehind中，当Enabled=False时，更改DropDownList SelectedV

下午好，

我有一个DropDownList，我正在OnPageLoad后面的代码中设置Enabled=false。稍后，当我按下页面上的保存按钮时，我试图提取数据，并从禁用的DropDownList中得到一个奇怪的值，从启用的DropDownList中得到正确的值。

我的问题是，我如何禁用DropDownList OnPageLoad，这样用户就不能更改数据，但仍然可以修改代码隐藏文件中的数据，并在需要时提取它？我看到enabled属性设置了只读标志，我尝试在修改其数据之前启用下拉菜单，但没有成功。有什么想法吗？

代码背后：

    protected void Page_Load(object sender, EventArgs e)
    {  
        for (int i = 1; i <= Convert.ToInt32(txtNumPrizes.Text.Trim()); i++)
        {
            DropDownList dl = new DropDownList();
            bool disableRow = true; //example
            dl.ID = "DDPrize" + i.ToString();
            dl.DataSourceID = "SqlDataSource1";
            dl.DataTextField = "PrizeName";
            dl.DataValueField = "PrizeID";
            Panel1.Controls.Add(dl);
            dl.DataBind();
            if (disableRow == true)
            {
                dl.Enabled = false;
            }
        } 
    }
    protected void Page_PreRender(object sender, EventArgs e)
    { 
        for (int i = 1; i <= Convert.ToInt32(txtNumPrizes.Text.Trim()); i++)
        {
            DropDownList dd = (DropDownList)Panel1.FindControl("DDPrize" + i.ToString());
            //disable the row if prize was already assigned to a player
            int place = 1; //example
            int selectedValue = DropDownSelect(i, place, GetTournamentID());
            dd.SelectedValue = selectedValue.ToString(); //sets properly here
        } 
    }

        protected void btnSave_Click(object sender, EventArgs e)
        {
            for (int i = 1; i <= numPrizes; i++)
            {
                DropDownList dd = (DropDownList)Panel1.FindControl("DDPrize" + i.ToString());
                string key = dd.SelectedValue;//here is where we can't get the selected value :(
            }
        }