Add a Book using the Form>

Instructions

In the Class Browser, select the AddBookForm.
In the properties window, select buttonOK.
In the methods window, select click. A method skeleton for the buttonOK_click method is displayed.
Select the code on the right by clicking and dragging.
Copy it to the clipboard.
Paste the code into the skeleton method.
Select the Methods | Compile Method menu command. The status line displays a message
ŤCompilation complete - no errorsť
Run your application and add a new book.
Return to the Class Browser to check that the book is in the database.
Select the Book class.
Select the Classes | Inspect Instances menu command.
A database inspector window is displayed.
Click the last Book object to view its details.
Close the inspector windows by selecting the File | Close All menu command.

buttonOK_click(btn: Button input) updating;

vars
    bk : Book;            // bk is a variable of type Book

begin
    beginTransaction;     // required for database changes
    // create a Book object and set its properties
    create bk;
    bk.title := textBoxTitle.text;
    bk.isbn := textBoxIsbn.text;
    bk.author := textBoxAuthor.text;
    commitTransaction;     // update and release locks

    // clear text boxes and display message on status line
    textBoxTitle.text := null;
    textBoxIsbn.text := null;
    textBoxAuthor.text := null;
    statusLine.caption := 'Book "' & bk.title & '" added';
end;

Troubleshooting

If your code did not compile and the following error message is displayed on the status line, click the error message to find out what to do.

Error 6027 - Unknown identifier


1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	Contents


For maximum reliability, security and performance of your JADE solution, JADE Care24 is our fully comprehensive systems management offering.