protected async void Add_Clicked(object sender, EventArgs e)
{
var editViewModel = new AttendanceEditViewModel(viewModel.Users.ToList(), viewModel.Reasons.ToList(), null);
var page = new AttendanceEditPage();
page.BindingContext = editViewModel;
await((MainPage)App.Current.MainPage).NavigateTo(page, true);
}
private async Task editAttendance(DataLayer.Models.Attendance attendance)
{
var editViewModel = new AttendanceEditViewModel(viewModel.Users.ToList(), viewModel.Reasons.ToList(), attendance);
var page = new AttendanceEditPage();
page.BindingContext = editViewModel;
await((MainPage)App.Current.MainPage).NavigateTo(page, true);
}