Hello Adrian,
Thank you for writing.
You can use the RadGridView.
FilterPopupRequired event and specify the FilterPopupRequiredEventArgs.
FilterPopup property. The
FilterPopupRequired event is thrown just before filter pop up showing. It gives access to the current filter pop up through
FilterPopup argument and also allows setting up any custom made pop up, which implements
IGridFilterPopup interface. In order to show date values grouped by year and month in a list you can show a
RadListFilterPopup:
Please refer to the
Excel-like filtering help article >> Customizing Excel-like filtering popup section.
I hope this information helps. Should you have further questions, I would be glad to help.
Regards,
Dess
Telerik
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