Implement the ItemCommand EVent
<asp:LinkButton ID="linkButton1" CommandName="select" runat="server" Text='<%# Eval("ID") %>' />
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "select")
{
LinkButton l = new LinkButton();
l= (LinkButton)e.Item.FindControl("linkButton1");
Response.Write(l.Text);
}
}