asp.net+VS2010实现点菜系统

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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" onclick="btnSelect_Click" Text="点菜" />        <asp:Button ID="btnDelete" runat="server" onclick="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>

设计如图所示：

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++;            }        }    }}

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