Add method to button event in listview

<asp:ListView ID="lvBalance" runat="server" >
<LayoutTemplate>
<div style="width:100%;overflow-y:auto;">
<table border=0 cellpadding=0 cellspacing=0 style="float:left;table-layout:fixed;" class="datagrid-body easydatagrid">
<asp:PlaceHolder id=itemPlaceholder runat=server/>
</table>
<div style='display: none; width: 200px;' class="div2"></div>
</div>
</LayoutTemplate>
<ItemTemplate>
<tr><td>
<asp:LinkButton ID="lb_delete" runat="server" CommandArgument='<%#Eval("ItemCode")%>' OnClientClick="return confirm('Confirm to delete this message?');" onclick="lb_delete_Click" Text="Delete"></asp:LinkButton>
<</td>/tr>
</ItemTemplate>
</asp:ListView>