I am using a tabbed app and I have a button on one tab, when the user clicks then it increments a Preference and I want to update its value on another tab. I tried to experiment with MVVM but I couldnt figure it out.
public partial class Page1View: ContentPage
{
public Page1View()
{
InitializeComponent();
}
private void Button_Clicked(object sender, EventArgs e)
{
Preferences.Set("Total", Preferences.Get("Total", 0)+1);
}
}
public class Page2ViewModule : INotifyPropertyChanged
{
public int Total
{
get => Preferences.Get(nameof(Total), 0);
set
{
if (Preferences.Get(nameof(Total),0) == value)
return;
Preferences.Set(nameof(Total), value);
OnPropertyChanged(nameof(Total));
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
var changed = PropertyChanged;
if (changed != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}