//update group names/group numbers
private void btngapply_Click(object sender, EventArgs e)
{
GroupDB gdb = new GroupDB(db);
gdb.updateGroupNames(NameA.Text, NameB.Text, NameC.Text);
gdb.updateGroupNumbers(Convert.ToInt32(Anum.Value), Convert.ToInt32(bNum.Value), Convert.ToInt32(cNum.Value));
msg2lbl.Visible = true;
}