asp.net 4.5演習〜test5-16

webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test5_16.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        请选择<asp:Label ID="Label1" runat="server" Text="你喜欢的电影"></asp:Label>：<br />
        <asp:ListBox ID="ListBox1" runat="server" Height="199px" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged" SelectionMode="Multiple" AutoPostBack="True">
            <asp:ListItem Value="大话西游"></asp:ListItem>
            <asp:ListItem Value="终结者"></asp:ListItem>
            <asp:ListItem Value="无间道"></asp:ListItem>
            <asp:ListItem Value="明日边缘"></asp:ListItem>
            <asp:ListItem Value="遗落战境"></asp:ListItem>
            <asp:ListItem Value="夏洛特烦恼"></asp:ListItem>
            <asp:ListItem Value="无人区"></asp:ListItem>
            <asp:ListItem Value="疯狂的石头"></asp:ListItem>
        </asp:ListBox><br />
        <asp:Label ID="Label2" runat="server" Text=""></asp:Label>
    </div>
    </form>
</body>
</html>

webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace test5_16
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            int count = ListBox1.Items.Count;
            string result = "";
            for (int i = 0; i < count; i++)
            {
                if (ListBox1.Items[i].Selected == true)
                {
                    result += ListBox1.Items[i].Text + " ";
                }
            }
            Label2.Text = Label1.Text +" : " + result;
        }

    }
}

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