private void EnableItemDetails()
{
partnum_txt.Enabled = !(BillDataGrid.Rows.Count == 0);
desc_txt.Enabled = !(BillDataGrid.Rows.Count == 0);
ops_cbo.Enabled = !(BillDataGrid.Rows.Count == 0);
qty_num.Enabled = !(BillDataGrid.Rows.Count == 0);
uom_cbo.Enabled = !(BillDataGrid.Rows.Count == 0);
ViewAsAsm_chk.Enabled = !(BillDataGrid.Rows.Count == 0);
findpart_btn.Enabled = !(BillDataGrid.Rows.Count == 0);
}