//Getting DataContext (ViewModel) as navigation parameter, assigning actions and making the back button visible.
protected override void OnNavigatedTo(NavigationEventArgs e)
{
IHistoryVM vm = (IHistoryVM)e.Parameter;
DataContext = vm;
vm.DbErrorAction = PopDbErrorAsync;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
//Navigating to HistoryView with its ViewModel.
private void History(IHistoryVM vm)
{
Frame.Navigate(typeof(HistoryView), vm);
}
public SwitchCurrencyCommand(IHistoryVM IVM)
{
VM = IVM;
}
