Inserting item in a receipt from a list of items (Page 1 of 4)

now works

italiano. Di sbagliato era che le quantità andavano inserite nel database Scontrino

ora funziona

Devi togliere da default 22  del campo iva.
Se vuoi che che tenga in memoria la percentuale lavora con il file ini

Ah ok, grazie, non so come ci sia finito quel 22 in default ma va bè.
Invece un altro problema che non riesco a risolvere è quando faccio un nuovo scontrino: intanto al primo inserimento, nel momento in cui inserisco un articolo me lo inserisce doppio e inserisce anche dei record vuoti tra i due doppioni oppure addirittura tutti i record se cancello i record e li reinserisco il problema non si pone solo la prima volta dopo l'apertura del programma, nella tabella "Scontrino" ho messo un campo calcolato (Totale), mi sembra di aver scritto bene ma in ogni caso non funziona.
Poi riaprendo la finestra per fare un nuovo scontrino mi ridà lo scontrino già compilato con l'ultimo fatto. Grazie ancora.

ENGLISH
On the other hand, another problem that I cannot solve is when I make a new receipt: in the meantime, at the first insertion (form frmScontrino, clicking on "Crea scontrino" in the first windows), when I insert an article, it inserts it double and also inserts empty records between the two duplicates or even all the records, if I delete the records and re-enter them, the problem does not arise only the first time after opening the program, in the "Scontrino" table I put a calculated field (Totale), it seems to me to have written well but in any case it does not work.
Then reopening the window to make a new receipt gives me the receipt already filled in with the last fact. Thanks again.

È scritto in russo In ogni caso la documentazione (in inglese) già l'ho letta tutta.

I have already read all the documentation and even translated it into Italian. I have tried to study the Invoice project but unfortunately neither of the two things helps me to understand some things that I cannot solve in my project.
In particular the last problem I wrote, which does not always happen but only at the first opening of the program.

Hi Derek, despite the world period we all know I'm fine, thanks. I hope for you it is the same.
In Italy we all had to stay indoors for two months except for the possibility of going out for emergencies such as shopping or going to the doctor. Now we can go out but we must use all possible precautions also because the cases of covid are increasing again, let's hope for the best.
I don't know how to thank you, you solved most of the problems I would have asked in advance and I thank you very much also for the very useful explanations and scripts comments and also for the graphic corrections.
I tried to implement some features but couldn't:
In the form "frmScontrino" I would like to view the total sales price, that is the price of each item ("Articoli" table) for their quantity, all in all. The same thing if possible also in the form "frmListascontrini". The selling price is found in the "Articoli" table in the "PrezzoVendita" field. In order to know what the total of the receipt is and therefore the amount due. I tried with a calulated field that it would be perfect but I couldn't.
Thanks a lot derek !!!

Tante grazie domebil. Solo che si presenta un piccolo problema: quando seleziono uno scontrino nella finestra "Lista scontrini" a sinistra mi esce un errore con scritto "List index out of bounds (13)".

ENGLISH
Many thanks domebil. Only there is a small problem: when I select a receipt in the "List of receipts" window on the left I get an error saying "List index out of bounds (13)".

nuova grafica e e funzioni

vedi ora

Ciao Fabio, Domebil,
The program is working okay - stock is reduced when you add a receipt, changed when you amend the quantity and added back to stock when a receipt is deleted. 
The issue is that the calculated fields in 'frmlistaarticoli.tablegrid1' are not automatically re-freshed.  This is fixed by adding a frmlistaarticoli.tablegrid1.dbupdate statement in the script (please see the attached).
The error 'foreign key constraint failed' is because you are trying to delete an item from the 'articoli' table that is being referenced in the 'scontrinodetail' table.
If an item is no longer needed in the 'articoli' table (for example, an item has been discontinued), then you could add an indicator to the 'articoli' table and then amend any relevant comboboxes to exclude discontinued items and prevent them from being used again.
Derek.