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ÎÒÔÚ³ö¿â´°¿ÚдÁ˸ö·½·¨£ºADOQueryBill µÄbNum ×ֶεÄOnValidate·½·¨ ʵÏÖµÄÊdzö¿âÊýÁ¿²»ÄÜ´óÓÚÈë¿âµÄÊýÁ¿£¬·ñÔò¾ÍÖØÐÂÊäÈëÊýÁ¿£¬ÒÔÏÂÊÇÎҵĴúÂ룺
procedure TFrmStockOut.ADOQueryBillbNum_Validate(Sender: TField);
var
 strMsg : string;
begin
  if not ADOQueryBill.Eof then
  begin
  ADOQueryBill.FieldByName('bNum_').AsInteger:=(ADOQueryBill.FieldByName('bNum_').AsInteger
  -StrToInt(DBGridBill.Fields[2].Text));
  if ADOQueryBill.FieldByName('bNum_').AsInteger < 0 then
  begin
  strMsg := 'ÁϺÅΪ' + FrmStockIn.ADOQueryBill.FieldByName('pCode_').AsString
  + 'µÄÎïÁÏ¿â´æÁ¿²»¹»,×î¶àÖ»ÄÜÊÇ'+FrmStockIn.ADOQueryBill.FieldByName('bNum_').AsString
  +'ÇëÖØÐÂÊäÈëÊýÁ¿£¡';
  ShowMessage(strMsg);
  Abort;
  end
  else
  begin
  ADOQueryBill.Close;
  ADOQueryBill.SQL.Clear;
  ADOQueryBill.SQL.Add('Update ioTicketB set bNum_=(ioTicketB.bNum_ - :a), ');
  ADOQueryBill.Parameters.ParamByName('a').Value :=
  ADOQueryBill.FieldByName('bNum_').AsInteger;
  ADOQueryBill.ExecSQL;
  end;
  end
  else
  begin
  ShowMessage('ûÓиÃÎïÁÏ');
  Abort;
  end;
end;
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