//when a contact is selected from the list
async void Contact_Selected(object sender, SelectedItemChangedEventArgs e)
{
if (contactList.SelectedItem == null)
{
return;
}
var selectedContact = e.SelectedItem as Contact;
//make sure it's unselected when you go back to the main list
contactList.SelectedItem = null;
//subscribe to the ContactUpdated event
var page = new ContactDetailsPage(selectedContact);
page.ContactUpdated += (source, contact) =>
{ //update all the properties of the contact
selectedContact.Id = contact.Id;
selectedContact.FirstName = contact.FirstName;
selectedContact.LastName = contact.LastName;
selectedContact.Phone = contact.Phone;
selectedContact.Email = contact.Email;
selectedContact.IsBlocked = contact.IsBlocked;
};
//after all that, show the contact details page
await Navigation.PushAsync(page);
}
//When Add button in toolbar is clicked - OnAddContact
async void OnAddContact(object sender, EventArgs e)
{
var page = new ContactDetailsPage(new Contact());
//subscribe to the ContactAdded event delegated by EventHandler<Contact> in ContactDetailsPage.xaml.cs
page.ContactAdded += (source, contact) => _contacts.Add(contact);
//navigate to page once contact is added
await Navigation.PushAsync(page);
}
