how to get checkbox is checked when checkbox is in table rows

how to get checkbox is checked when checkbox is in table rows

<asp:Table ID="mytbl" runat="server">
</asp:Table>

while (res.Read())
{
                             trow = new TableRow();
                             tcell1 = new TableCell();
                             tcell2 = new TableCell();
                             CheckBox ch = new CheckBox();
                             ch.CssClass = "chkBox";
                             ch.ID = res.GetInt32(1) + "_" + res.GetInt32(2);
                             //ch. = res.GetInt32(1) + "_" + res.GetInt32(2);
                             values.Add(res.GetInt32(1) + "_" + res.GetInt32(2));
                             tcell1.Controls.Add(ch);
                             tcell2.Text = res.GetString(0);
                             trow.Cells.Add(tcell1);
                             trow.Cells.Add(tcell2);
                             mytbl.Rows.Add(trow);

}

I want check checkbox is checked and save result in database