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
Form1 : Form
sender, Telerik.WinControls.UI.FilterPopupRequiredEventArgs e)
Please refer to the Excel-like filtering help article >> Customizing Excel-like filtering popup
I hope this information helps. Should you have further questions, I would be glad to help.
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