<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div> <asp:ListBox ID="ListBox1" runat="server" SelectionMode="Multiple"></asp:ListBox> <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text=">" /> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text=">>" /> <asp:ListBox ID="ListBox2" runat="server" SelectionMode="Multiple"></asp:ListBox></div> </form></body></html>using System;using System.Data;using System.Configuration;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 _Default : System.Web.UI.Page 
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) { this.ListBindData();
} } public void ListBindData() { string connstr=ConfigurationManager.AppSettings["ConnectionString"].ToString(); SqlConnection con = new SqlConnection(connstr); if (con.State.Equals(ConnectionState.Closed)) { con.Open(); } SqlCommand cmd = new SqlCommand("select * from guestbook",con); SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); //这是第一种方法了 //while (sdr.Read()) //{ // ListBox1.Items.Add(new ListItem(sdr["title"].ToString(),sdr["id"].ToString())); //} ListBox1.DataSource = sdr; ListBox1.DataTextField = "title"; ListBox1.DataValueField = "id"; ListBox1.DataBind(); } protected void Button1_Click(object sender, EventArgs e) { foreach (ListItem item in ListBox1.Items) { ListBox2.Items.Add(item); } ListBox1.Items.Clear(); } protected void Button2_Click(object sender, EventArgs e) { ListBox2.Items.Add(ListBox1.SelectedItem); ListBox1.SelectedIndex = -1; ListBox2.SelectedIndex = -1; }
}