Csharp:asp.net CheckBoxList databind

<style type="text/css">  .geovindu INPUT{ color:black; border-style: none; font-family: Tahoma; font-size: 7px; margin-right: 5px}.geovindu td {     /*  font-size:x-large;*/    width:300px;   }    </style>

<asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatDirection="Horizontal" AppendDataBoundItems="True" DataTextField="B_Name" DataValueField="B_EnglishName" RepeatColumns="6" CellPadding="5"           CellSpacing="5" RepeatLayout="Table" BorderStyle="Outset" CssClass="geovindu">        </asp:CheckBoxList><br />        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="確定" /></div>

/// <summary>        /// CheckBoxList數據源        /// 塗聚文        /// 20130705        ///         /// </summary>        private void setCheckBoxList()        {           DataTable dt = new DataTable();           CheckBoxList1.Items.Clear();          dt = geovindu_branchBLL.SelectGeovindu_branchNameDt();          CheckBoxList1.DataSource = dt;          this.CheckBoxList1.DataTextField = "B_Name";          this.CheckBoxList1.DataValueField = "B_EnglishName";          CheckBoxList1.DataBind();        }        /// <summary>        ///         /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                setCheckBoxList();            }              }        /// <summary>        /// 獲取選擇的項目        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Button1_Click(object sender, EventArgs e)        {            string variable = string.Empty;            int i = 0;            foreach (System.Web.UI.WebControls.ListItem oItem in CheckBoxList1.Items)            {                if (oItem.Selected) // if you want only selected                {                    if (i ==0)                    {                       variable = oItem.Value;                     }                    else                    {                        variable = variable + "," + oItem.Value;                    }                    i++;                }                // otherwise get for all items                //variable = oItem.Value;                            }            //傳值給父頁面             this.Page.Controls.Add(new LiteralControl(string.Format("<script>opener.document.form1.txtShoppingDealsBranch.value='{0}'</script>", variable)));           //關閉此視窗         this.Page.Controls.Add(new LiteralControl("<script>window.close();</script>"));