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
<%
@ Page Language="C#"
%>
<
script
runat
="server"
>
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
ListItem[] items = new ListItem[]
{
new ListItem("Item 1", "Value 1"),
new ListItem("Item 2", "Value 2", false),
new ListItem("Item 3", "Value 3"),
new ListItem("Item 4", "Value 4")
};
ListBox1.Items.AddRange(items);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
foreach (ListItem item in ListBox1.Items)
{
Response.Write(item.Text + " enabled=" + item.Enabled + "<br>");
}
}
</
script
>
<
html
xmlns
="http://www.w3.org/1999/xhtml"
>
<
head
runat
="server"
>
<
title
>
Untitled Page
</
title
>
</
head
>
<
body
>
<
form
id
="form1"
runat
="server"
>
<
div
>
<
asp:ListBox
ID
="ListBox1"
runat
="server"
/>
<
asp:Button
ID
="Button1"
runat
="server"
Text
="Button"
OnClick
="Button1_Click"
/></
div
>
</
form
>
</
body
>
</
html
>
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
<%
@ Page Language="C#"
%>
<
script
runat
="server"
>
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { ListItem[] items = new ListItem[] { new ListItem("Item 1", "Value 1"), new ListItem("Item 2", "Value 2", false), new ListItem("Item 3", "Value 3"), new ListItem("Item 4", "Value 4") }; ListBox1.Items.AddRange(items); } } protected void Button1_Click(object sender, EventArgs e) { foreach (ListItem item in ListBox1.Items) { Response.Write(item.Text + " enabled=" + item.Enabled + "<br>"); } }
</
script
>
<
html
xmlns
="http://www.w3.org/1999/xhtml"
>
<
head
runat
="server"
>
<
title
>
Untitled Page
</
title
>
</
head
>
<
body
>
<
form
id
="form1"
runat
="server"
>
<
div
>
<
asp:ListBox
ID
="ListBox1"
runat
="server"
/>
<
asp:Button
ID
="Button1"
runat
="server"
Text
="Button"
OnClick
="Button1_Click"
/></
div
>
</
form
>
</
body
>
</
html
>
本文转自高海东博客园博客，原文链接：http://www.cnblogs.com/ghd258/archive/2005/10/27/262995.html，如需转载请自行联系原作者
