<%@ Page Language="C#" %>
<!DOCTYPE html>
<script runat="server">
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
foreach (ListItem li in ListBox1.Items)
{
if (li .Selected )
{
result.Text += li.Text + "<br/>";
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ListBox SelectionMode ="Multiple" ID="ListBox1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged">
<asp:ListItem>Your first item</asp:ListItem>
<asp:ListItem>Your Second Item</asp:ListItem>
<asp:ListItem>Your Third item</asp:ListItem>
</asp:ListBox>
<br />
<br />
<asp:Label ID="result" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
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