public async void Add(PersonItem input)
{
try
{
this.IsIdle = false;
if (input.Name == @"a")
{
await this.Dialog.DisplayAsync(@"Cannot insert person with this 'reserved' name.");
return;
}
this.Items.Add(new PersonItem {
Name = input.Name, Email = input.Email
});
this.NewItem.Name = string.Empty;
this.NewItem.Email = string.Empty;
}
finally
{
this.IsIdle = true;
}
}
public PersonItemViewModel(IDialogInterface dialog)
{
if (dialog == null)
{
throw new ArgumentNullException("dialog");
}
this.Dialog = dialog;
this.Items = new ObservableCollection <PersonItem>();
this.AddCommand = new DelegateCommand <PersonItem>(this.Add, this.CanExecuteAdd);
this.DeleteCommand = new DelegateCommand <PersonItem>(this.Delete, this.CanExecuteDelete);
this.NewItem = new PersonItem();
this.NewItem.PropertyChanged += (sender, args) => this.AddCommand.RaiseCanExecuteChanged();
}
private async void Delete(PersonItem input)
{
var confirmed = await this.Dialog.ConfirmAsync(@"Are you sure you want to delete this item?") ?? false;
if (confirmed)
{
try
{
this.IsIdle = false;
await Task.Delay(TimeSpan.FromSeconds(3));
this.Items.Remove(input);
}
finally
{
this.IsIdle = true;
}
}
}
private bool CanExecuteDelete(PersonItem input)
{
return(input != null);
}
private bool CanExecuteAdd(PersonItem input)
{
return(!string.IsNullOrWhiteSpace(input.Name) &&
!string.IsNullOrWhiteSpace(input.Email));
}