public override void Selected(UIPickerView pickerView, nint row, nint component)
{
if (component == YearComponentIndex)
{
SelectedYear = (int)pickerView.SelectedRowInComponent(YearComponentIndex);
if (this.PickerView.CustomDatePicker?.DatePicker?.HasDay == true)
{
pickerView.ReloadComponent(DayComponentIndex);
}
if (this.PickerView.CustomDatePicker?.DatePicker?.HasMonth == true)
{
pickerView.ReloadComponent(MonthComponentIndex);
}
}
else if (component == MonthComponentIndex)
{
SelectedMonth = (int)pickerView.SelectedRowInComponent(MonthComponentIndex);
if (this.PickerView.CustomDatePicker?.DatePicker?.HasDay == true)
{
pickerView.ReloadComponent(DayComponentIndex);
}
}
else
{
SelectedDay = (int)pickerView.SelectedRowInComponent(DayComponentIndex);
}
YearModel yearModel = this.PickerView.Years[SelectedYear];
if (yearModel.Months.Count <= 0)
{
return;
}
MonthModel monthModel = yearModel.Months[SelectedMonth];
if (monthModel.Days.Count <= 0)
{
return;
}
SelectedDay = SelectedDay >= monthModel.Days.Count ? monthModel.Days.Count - 1 : SelectedDay;
DayModel dayModel = monthModel.Days[SelectedDay];
SelectedItem = yearModel.Year + "-" + monthModel.Month + "-" + dayModel.Day;
if (!string.IsNullOrEmpty(SelectedItem))
{
this.PickerView.SelectedPropertyChanged(SelectedItem);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Picker> e)
{
base.OnElementChanged(e);
if (Control == null)
{
return;
}
Control.Layer.BorderWidth = 0;
Control.BorderStyle = UITextBorderStyle.None;
Years = new ObservableCollection <YearModel>();
var startDate = DateTime.Today.AddYears(-30);
for (int i = 0; i <= 30; i++)
{
var yearDate = startDate.AddYears(i);
YearModel yearModel = new YearModel
{
Year = yearDate.Year.ToString(),
Months = new ObservableCollection <MonthModel>()
};
for (int y = 1; y <= 12; y++)
{
MonthModel monthModel = new MonthModel
{
Month = y.ToString(),
MonthName = new DateTime(yearDate.Year, y, 1).GetMonthName(),
Days = new ObservableCollection <DayModel>()
};
var daysInMonth = DateTime.DaysInMonth(yearDate.Year, y);
for (int d = 1; d <= daysInMonth; d++)
{
DayModel dayModel = new DayModel
{
Day = d.ToString()
};
monthModel.Days.Add(dayModel);
}
yearModel.Months.Add(monthModel);
}
Years.Add(yearModel);
}
var pickerSource = new PickerSource(this);
UIPickerView view = new UIPickerView
{
Model = pickerSource,
};
pickerSource.DayComponentIndex = CustomDatePicker.DatePicker.HasDay ? 0 : -1;
pickerSource.YearComponentIndex = (int)pickerSource.GetComponentCount(view) - 1;
if (!CustomDatePicker.DatePicker.HasDay && CustomDatePicker.DatePicker.HasMonth)
{
pickerSource.MonthComponentIndex = 0;
}
else if (CustomDatePicker.DatePicker.HasMonth)
{
pickerSource.MonthComponentIndex = 1;
}
else
{
pickerSource.MonthComponentIndex = -1;
}
if (CustomDatePicker.DatePicker.HasYear)
{
view.Select(pickerSource.SelectedYear, pickerSource.YearComponentIndex, false);
}
if (CustomDatePicker.DatePicker.HasMonth)
{
view.Select(pickerSource.SelectedMonth, pickerSource.MonthComponentIndex, false);
}
if (CustomDatePicker.DatePicker.HasDay)
{
view.Select(pickerSource.SelectedDay, pickerSource.DayComponentIndex, false);
}
Control.InputView = view;
}