listbox select event
To enable the listbox select event, you need to set listbox AutoPostBack proerty to true.
<asp:ListBox ID="ListBox1" runat="server" SelectionMode="Multiple" AutoPostBack="True" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged">
<asp:ListItem>Moto</asp:ListItem>
<asp:ListItem>Samsung</asp:ListItem>
<asp:ListItem>Micro</asp:ListItem>
<asp:ListItem>Sony</asp:ListItem>
<asp:ListItem>AIWA</asp:ListItem>
<asp:ListItem>APPLE</asp:ListItem>
<asp:ListItem>Acer</asp:ListItem>
</asp:ListBox>
<br />
C# code behind
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Write(ListBox1.SelectedValue);
}
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