aspx repeater Do something with the data - asp.net

Question

I have made a webform, and by using a repeater i would like to display the results with the option of approving/disapproving applicants. I have searched high and low, but I am unable to discover how i can use the data of the item in the item repeater. If someone could point me in the right direction as to how i could do this i would appreciate it alot.
So as example. Someone presses the button approve in one of the repeated items. and i would like to do some db query using the email address which is displayed in that item
codebehind:
protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if(((Button)e.CommandSource).Text.Equals("Approve"))
{
//
}
}
and this is the aspx:
<asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">
<ItemTemplate>
<div class="Application">
<table class="auto-style1">
<tr>
<td class="small">Application received:</td>
<td class="big"><asp:Label ID="lbl_App_Date" runat="server" Text='<%# Eval("app_date") %>'></asp:Label></td>
<td class="small">Status:</td>
<td class="small"><asp:Label ID="lbl_App_status" runat="server" Text='<%# Eval("app_status") %>'></asp:Label></td>
</tr>
<tr>
<td class="small">Email Address: </td>
<td class="big"><asp:Label ID="lbl_App_email" runat="server" Text='<%# Eval("app_email") %>'></asp:Label></td>
<td class="small">Age: </td>
<td class="small"><asp:Label ID="lbl_App_age" runat="server" Text='<%# Eval("app_age") %>'></asp:Label></td>
</tr>
<tr>
<td>Country: </td>
<td><asp:Label ID="lbl_App_Country" runat="server" Text='<%# Eval("app_country") %>'></asp:Label></td>
<td>Platform: </td>
<td><asp:Label ID="lbl_App_Platform" runat="server" Text='<%# Eval("app_platform") %>'></asp:Label></td>
</tr>
</table>
<p><b>Motivation to join: </b></p>
<asp:TextBox ID="txt_App_Moti" ReadOnly="true" Text='<%# Eval("app_moti") %>' TextMode="MultiLine" Height="150px" Width="60%" runat="server"></asp:TextBox>
<asp:Panel ID="pan_approval" runat="server">
<table class="auto-style1">
<tr>
<td class="small"></td>
<td class="big"><asp:Button ID="btn_approve" runat="server" Text="Approve" /></td>
<td class="small"></td>
<td class="small"><asp:Button ID="btn_disapprove" runat="server" Text="Disapprove" /></td>
</tr>
</table>
</asp:Panel>
</div>
</ItemTemplate>
</asp:Repeater>