public async void PriceFromPick_Clicked(object sender, EventArgs e)
{
SelectPricePage selectPricePage = new SelectPricePage(viewModel.PostModel.PriceFrom, viewModel.PostModel.PriceFromUnit);
selectPricePage.SetSaveEvent(async(object sSender, EventArgs sE) =>
{
viewModel.PostModel.PriceFromUnit = (short)selectPricePage.SelectedOption.Id;
viewModel.PostModel.PriceFromText = DecimalHelper.DecimalToText(selectPricePage.Price) + " " + selectPricePage.SelectedOption.Name.ToLower();
viewModel.PostModel.PriceFrom = DecimalHelper.TextToDecimal(selectPricePage.Text);
viewModel.PostModel.PriceFromQuyDoi = selectPricePage.Price * selectPricePage.SelectedOption.QuyDoi;
await Navigation.PopAsync();
});
await Navigation.PushAsync(selectPricePage);
}