下拉菜单数据绑定的方法
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    /// <summary>    /// 绑定下拉菜单    /// </summary>    private void DDLBind()    {        ddlTwoBranch.Items.Clear();//清空ListItem对象        ddlTwoBranch.Items.Add(new ListItem("请选择", "-1"));//添加一个默认选择字符串        IList<ConfigSecondBranch> twoBranchLists = ConfigSecondBranchManager.GetAllConfigSecondBranch();//获取表中所有信息并存储到泛型集合中        //循环泛型集合的每一项        foreach (ConfigSecondBranch twoBranchList in twoBranchLists)        {            ListItem ddlBranchList = new ListItem();//新建ListItem对象来存放下拉列表的每一项            ddlBranchList.Text = twoBranchList.SecFirId.FirName + " - " + twoBranchList.SecName;//绑定每一项的文本内容            ddlBranchList.Value = twoBranchList.SecId.ToString();//绑定每一项的值            ddlTwoBranch.Items.Add(ddlBranchList);//添加到下拉列表中        }    }