C validating textbox input
Input validation should be applied on both syntactical and semantic level.
Click on the control to display its properties on the panel at the left side of the Dynaform design.
The properties set by default are the following: By checking this option, an asterisk is added in the label to indicate that the field is required.
It means that an option must be selected mandatorily from the control.
This time, however, I'll focus on only one record at a time that the end user can edit (for the first time) or modify.
To build the example application, start Delphi, and drop TSQLConnection, TSQLData Set, TData Set Provider, TClient Data Set, and TData Source components.