<td>
                  <asp:LinkButton ID="lnkDelete"  OnClick="DeleteCustomer" Text="Delete" runat="server"  OnClientClick="return confirm('Do you want to delete this row?');" />
                 <asp:Label ID="lblCustomerId" runat="server" Text='<%# Eval("CustomerId") %>' Visible="true"/>
                   </td> 

 
 public override void VerifyRenderingInServerForm(Control control)
        {

        }
protected void DeleteCustomer(object sender, EventArgs e)
        {
            int customerId = int.Parse(((sender as LinkButton).NamingContainer.FindControl("lblCustomerId") as Label).Text);
            string constr = ConfigurationManager.ConnectionStrings["AZTUConnectionString2"].ConnectionString;
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand("DELETE FROM Customers WHERE CustomerId = @CustomerId", con))
                {
                    cmd.Parameters.AddWithValue("@CustomerId", customerId);
                    con.Open();
                    cmd.ExecuteNonQuery();
                    con.Close();
                }
            }

            this.BindRepeater();
        }