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ListBox 绑定多个选项为选中

2016-03-23 15:43 323 查看

<%@ 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></title>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:TextBox ID="TextBox1" runat="server" Width="300"></asp:TextBox>

<br />

<asp:Button ID="Button1" runat="server" Text="Binding" OnClick="Button1_Click" />

<br />

<br />

<asp:ListBox ID="ListBox1" runat="server" Height="100" SelectionMode="Multiple" ></asp:ListBox>

</div>

</form>

</body>
</html>

后台代码

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Collections;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

Data_Binding();

}

}

private void Data_Binding()

{

this.ListBox1.DataSource = Site();

this.ListBox1.DataTextField = "key";

this.ListBox1.DataValueField = "value";

this.ListBox1.DataBind();

}

private Dictionary<string, string> Site()

{

Dictionary<string, string> site = new Dictionary<string, string>();

site.Add("Insus.NET cnblogs", "http://insus.cnblogs.com");

site.Add("Microsoft", "http://www.microsoft.com");

site.Add("Google", "http://www.google.com");

site.Add("Yahoo", "http://www.yahoo.com.cn");

site.Add("Ifeng", "http://www.ifeng.com");

site.Add("sina", "http://www.sina.com.cn");

site.Add("163", "http://www.163.com");

site.Add("QQ", "http://www.qq.com");

return site;

}

protected void Button1_Click(object sender, EventArgs e)

{

string[] s = this.TextBox1.Text.Split(';');

foreach (ListItem li in this.ListBox1.Items)

{

li.Selected = ((IList)s).Contains(li.Text) ? true : false;

}

}

}

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