Fetch primary key from Repeater

Hello guys 
I have a query about fetch the value from repetare 
i have bind repeater :
<asp:Repeater ID="Repeater1" runat="server"> <ItemTemplate> <table class="gradienttable"> <tr> <td style ="width :60px;"> <asp:ImageButton Width="60px" Height="50px" ID="imagfriendimage" ImageUrl='<%# Eval("ImagePath","~/Profilepics/{0}") %>' runat="server" /></td><td style ="width :150px;">
<asp:Label ID="lblfullname" Text='<%# Eval("FullName") %>' runat="server" ></asp:Label > </td> <td style ="width :80px;"> <asp:Label ID="lblcurrentcity" Text='<%# Eval("CurrentCity") %>' runat="server" ></asp:Label > </td> <asp: ...