Press the button of ุงูุชุนุงู ูุงุช
2-Select a box in the Data grid without selecting any entire row
3- press the ุชุนุฏูู button
exception appeared
1-in the Update of product , if you selected a row and changed the entery it adds new entery not update ,, it never updates it adds new elements
2-if you enterd the price with zero ,,it accept it
3-Quatity in products is always 123 even if you enterd it a zero
4- it accepts an empty rows
1-the update button in customers allows letters for telephone , and cash can be zero
2- it accepts empty rows for name and telephone , while cash doesn't change if it was an empty entery
3- cash accepts Zero if zero was written while remain the previous value if it was left null
4- it thows an exception if you deleted a phone number and clicked update giving the above issue
1- Same issue of accepting the phone a letters not only numbers
2- rows can be set empty (an empty entery row)
it deleted all the products related to this supplier
In transactions from
when adding a new transaction you choose the name of customer but as we accepted in customer name to be empty we can add a transaction for an empty name. And this adds the new transaction to the data base but generates errors in transaction details , I had to close the program and rerun it