asp.net+VS2010实现点菜系统

Default.aspx 源 码如下：

<%@ Page Title="主页" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"CodeBehind="Default.aspx.cs" Inherits="WebApplication5._Default" %><asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"><p>欢迎光临，请您点菜！</p><p><asp:ListBox ID="lbxSource" runat="server" Height="118px" SelectionMode="Multiple" style="margin-right: 105px" Width="135px"><asp:ListItem Value="0">鸡蛋汤</asp:ListItem><asp:ListItem Value="1">海带汤</asp:ListItem><asp:ListItem Value="2">万峦猪脚</asp:ListItem><asp:ListItem Value="3">炸猪排</asp:ListItem><asp:ListItem Value="4">上海醉蟹</asp:ListItem><asp:ListItem Value="5">红烧狮子头</asp:ListItem><asp:ListItem Value="6">排骨炖白菜</asp:ListItem></asp:ListBox><asp:Button ID="btnSelect" runat="server" οnclick="btnSelect_Click" Text="点菜" /><asp:Button ID="btnDelete" runat="server" οnclick="btnDelete_Click" style="height: 21px" Text="取消" /><asp:ListBox ID="lbxDest" runat="server" Height="118px" SelectionMode="Multiple" style="margin-right: 105px" Width="135px"></asp:ListBox></p>
</asp:Content>

注意设置listbox属性里的SelectionMode为Multiple（多选）。

Default.aspx.cs 源码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;namespace WebApplication5
{public partial class _Default : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){}protected void btnSelect_Click(object sender, EventArgs e){int count = lbxSource.Items.Count;int index = 0;for (int i = 0; i < count; i++){ListItem Item=lbxSource.Items[index];if (lbxSource.Items[index].Selected == true){lbxSource.Items.Remove(Item);lbxDest.Items.Add(Item);index--;}index++;}}protected void btnDelete_Click(object sender, EventArgs e){int count = lbxDest.Items.Count;int index = 0;for (int i = 0; i < count; i++){ListItem Item = lbxDest.Items[index];if (lbxDest.Items[index].Selected == true){lbxDest.Items.Remove(Item);lbxSource.Items.Add(Item);index--;}index++;}}}
}