CheckBoxList 的数据绑定及数据获取

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; //自己导入命名空间.
public partial class like : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack) //这句很重要,如果不加,则每次加载时都要执行一次绑定,易丢失数据.
{
//创建链接;
SqlConnection con = DB.createConnection(); //不再用 new
con.Open();
SqlCommand cmd = new SqlCommand("select * from [personlike]",con);
SqlDataReader sdr = cmd.ExecuteReader();

this.CheckBoxList1.DataTextField = "likeContent";
this.CheckBoxList1.DataValueField = "ID";

this.CheckBoxList1.DataSource = sdr;
this.CheckBoxList1.DataBind();

sdr.Close(); //关闭记录集
con.Close(); //关闭链接

}
}

//单击按钮读取所做的操作(数据),用Response.Write()方法显示.

protected void Button1_Click(object sender, EventArgs e)
{
for(int i=0;i<=this.CheckBoxList1.Items.Count-1;i++)
{
if(this.CheckBoxList1.Items[i].Selected)
{
Response.Write(this.CheckBoxList1.Items[i].Value.ToString() +"-"+this.CheckBoxList1.Items[i].Text + "<br>");
}
}
}
}