【求助】绑定DataTable到CheckBoxList

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        InitData();
    }
    private void InitData()
    {
        //链接数据库
        SqlConnection myCon = new SqlConnection();
        myCon.ConnectionString = "Persist Security Info=false; User id=sa;pwd=TianTang;database=northwind;server=(local)";
        myCon.Open();

        //使用sqlCommand提交查询命令
        SqlCommand selectCMD = new SqlCommand("select * from Categories", myCon);

        //获取数据适配器
        SqlDataAdapter da = new SqlDataAdapter();
        da.SelectCommand = selectCMD;

        //填充DataSet，得到DataTable
        DataSet ds = new DataSet();
        da.Fill(ds);
        DataTable dt = ds.Tables["Categories"];
        

        //将DataTable中的数据绑定到CheckBoxList
        CheckBoxList1.DataSource = dt;
        CheckBoxList1.DataTextField = "CategoryName";
        CheckBoxList1.DataValueField = "CategoryID";
        CheckBoxList1.DataBind();

        //断开连接
        myCon.Close();
    }
}