public MainPageViewModel(INavigationService navigationService,
ISayHello sayHello)
{
_navigationService = navigationService;
_SayHello = sayHello;
WhoAreYour = _SayHello.Hello();
}
public void OnNavigatedTo(NavigationParameters parameters)
{
if (parameters.ContainsKey("title"))
{
Title = (string)parameters["title"] + " and Prism";
}
Title += $" (From {_sayHello.Hello()})";
}
public MainPageViewModel(INavigationService navigationService, ISayHello sayHello)
{
this.navigationService = navigationService;
this.sayHello = sayHello;
GetSystemCommand = new DelegateCommand(() =>
{
Message = sayHello.Hello();
});
}
static void Main(string[] args)
{
SayHello obj = new SayHello();
IHello ih = obj;
ih.Hello(); // IHello
ISayHello ish = (ISayHello)ih; // or obj
ish.Hello(); // ISayHello
}
public void OnNavigatedTo(NavigationParameters parameters)
{
Title = _SayHello.Hello();
}
public MainPageViewModel(ISayHello sayHello)
{
_SayHello = sayHello;
HelloText = _SayHello.Hello();
}
public MainPageViewModel(ISayHello iSayHello)
{
_ISayHello = iSayHello;
Title = _ISayHello.Hello();
}