listbox控件示例

来源：互联网发布：指尖报销是什么软件编辑：程序博客网时间：2024/06/06 03:50

public partial class _Default : System.Web.UI.Page {    protected void Page_Load(object sender, EventArgs e)    {    }    protected void CheckBox1_CheckedChanged(object sender, EventArgs e)    {        if (CheckBox1.Checked == true)        {            ListBox1.Items.Add(new ListItem("Apple", "1"));            ListBox1.Items.Add(new ListItem("Strawberry", "2"));            ListBox1.Items.Add(new ListItem("Peach", "3"));            ListBox1.Items.Add(new ListItem("Bananas", "4"));        }        else        {            ListBox1.Items.Clear();        }    }    protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)    {        if (ListBox1.SelectedIndex >= 0)        {            Response.Write("<script language=javascript>alert('你选择了第 " + ListBox1.SelectedValue.ToString() +                 "项： " + ListBox1.SelectedItem.Text.ToString() + "');</script>");        }    }}