void Add(object sender, System.EventArgs e)
{
constants.senddata.Clear();
var page = new SelectDay();
add_btn.IsEnabled = false;
NavigationPage.SetHasNavigationBar(page, false);
Navigation.PushAsync(page);
add_btn.IsEnabled = true;
}
void Edit(object sender, System.EventArgs e)
{
constants.senddata.Clear();
var item = (MenuItem)sender;
ids = item.CommandParameter.ToString();
var selectedItem = ((EmployeeScheduleViewmodel)this.BindingContext).MYschdeule2.FirstOrDefault(d => d.Id == ids);
constants.senddata.Add(selectedItem);
var page = new SelectDay();
NavigationPage.SetHasNavigationBar(page, false);
Navigation.PushAsync(page);
}