private void DateOnMouseEnter(DateTime hoverDateTime) { if (IsRange) { DatePicker.HoverDateTime = hoverDateTime; DatePicker.InvokeStateHasChanged(); } int focusIndex = DatePicker.GetOnFocusPickerIndex(); string placeholder = DatePicker.GetFormatValue(hoverDateTime, focusIndex); DatePicker.ChangePlaceholder(placeholder, focusIndex); }