When a user fills out a form, I almost always want to perform some validity check on the data being entered. I know how to use the OnEditing event for any TcxEditContols but unfortunatly, it's not as easy as validators in ASP.NET.
It could be very nice to have some validation controls or new properties in TcEditControls like DisplayErrorMsg. This error message could be displayed at the bottom (or Top/Right/Left) of the controls with a Font property (for the size, color....) or even better, add in the LookAndFeel an Error style. It could be possible to change the border style too...
Anyway, something to show on a form all error fields with their own error message.
It's something like some properties in the RequiredFieldValidator, CompareValidator, RangeValidator, RegularExpressionValidator and CustomValidator ASP.NET components.
With VCL 12.2, we have added the Properties.ValidationOptions option set and the OnValidateDrawValue event, which allow you to easily validate data input and visualize validation results. The new capabilities are available in standalone and in-place editors, as well as editor repository items. To see how to use the option set when validating data input in standalone editors, run the EditorsValidationDemo shipped with the ExpressEditors Library. To see how to use the option set in combination with the event when validating data input in in-place editors, run the EditorsInPlaceValidationDemo shipped with the ExpressQuantumGrid, ExpressQuantumTreeList, and ExpressVerticalGrid Suites.