I have several forms which the user must navigate in order to "configure" my application for his particular facility. All the forms are unbound and have 2-3 cascading list boxes. Each list box has two command buttons next to it. One button for adding a record and one for deleting a record.
All was good until I found that if the DELETE button was clicked with no record selected in the list box, it throws an error. Similarly, if the ADD button on a child list box is clicked when no record is selected in the Parent list box, an attempt is made to create a record with nothing entered in the foreign key field (which I have intentionally disabled).
Is there a "best way" to handle this? Should I disable/hide the buttons until the list box is clicked on? Or should I trap that event and put up a message box? I think code for disabling the buttons will be a little simpler but I wanted to get advice from ones who have created many different applications.
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Posted by: david.pratt@outlook.com
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