在asp.net 2.0中,可以隐藏listbox中的某一项,比如
ListItem item = new ListItem(text, value, enabled);
当然,也可以用
item.Enabled = false;
虽然在页面中隐藏了,但依然可以用代码来访问隐藏的选项的,下面是一个例子
1@ Page Language="C#"
1<script runat="server">
2
3protected void Page_Load(object sender, EventArgs e)
4
5{
6
7if (!Page.IsPostBack)
8
9{
10
11ListItem[] items = new ListItem[]
12
13{
14
15new ListItem("Item 1", "Value 1"),
16
17new ListItem("Item 2", "Value 2", false),
18
19new ListItem("Item 3", "Value 3"),
20
21new ListItem("Item 4", "Value 4")
22
23};
24
25ListBox1.Items.AddRange(items);
26
27}
28
29}
30
31protected void Button1_Click(object sender, EventArgs e)
32
33{
34
35foreach (ListItem item in ListBox1.Items)
36
37{
38
39Response.Write(item.Text + " enabled=" + item.Enabled + "<br>");
40
41}
42
43}
44
45</script>
1<html xmlns="http://www.w3.org/1999/xhtml">
2<head runat="server">
3<title>Untitled Page</title>
4</head>
5<body>
6<form id="form1" runat="server">
7<div>
8<asp:listbox id="ListBox1" runat="server"></asp:listbox>
9<asp:button id="Button1" onclick="Button1_Click" runat="server" text="Button"></asp:button></div>
10</form>
11</body>
12</html>