INotifyDataErrorInfo and RadDropDownButton

[Alexey Oyun]

Hi,

Is possible to use INotifyDataErrorInfo interface to validate RadDropDownButton.

For example inside drop-down content I have list of items.
When user selects item, drop-down content set to item name.

If drop-down content is string.Empty it should be invalid.

Thanks, Alexey

[Tina Stancheva]

Hi Alexey Oyun,

I am not sure that I understand your scenario correctly. Can you please have a look at the attached project and let me know if this is close to what you had in mind?

Regards,
Tina Stancheva
the Telerik team

[Alexey Oyun]

Hi,
I will try to explain once more :)

Let's assume that we have drop-down control with checkboxes and combobox.

User opens drop-down and checks some options in it. Then changes selected item in combobox, which makes checked checkboxes in drop-down invalid.

User can see red border around checkbox if he opens drop-down, but drop-down itself won't show that it has invalid content.
One solution is to open drop-down to let user see invalid controls in drop-down content, other draw red border in around drop-down for same purpose.

Thanks, Alexey

[Miro Miroslavov]

Hi Alexey Oyun,

 I don't think this is possible, since the DropDownButton is not actually an Input control, so the validation for it is not working that way. You will need to implement such a validation logic for yourself, or change your Design so that the invalid items are always visible.
If we can be of further help, please let us know. 

Best wishes,
Miro Miroslavov
the Telerik team

[Alexey Oyun]

Hi,

Thanks for your time, maybe I will have to use validation summary or redesign UI.

Thanks, once more Alexey.