Common.Xamarin.ViewModel 1.0.0

Common.Xamarin.ViewModel

This is a simple package to add a base class with convenience utilities for ViewModels for Xamarin (and potentially other projects). This is a Net Standard 2.0 Project, if other projects are needed, I accept requests.

AffectsAttribute

Convenience Attribute to allow for Interacting Properties. If you want to change related properties you can add the attribute to a property and any properties listed will also get notified of changes when the initial property changes.

    string _title;
    [Affects("Capitalized","Lowercase")]
    public string Title { get => _title; set => Set(ref _title, value);
    
    public string Capitalized { get => Title.ToUpper(); }
    public string Lowercase { get => Title.ToLower(); }

BaseViewModel

Handles Basic ViewModel tasks including

• Implementing INotifyPropertyChanged
• Helper Methods to Handle Notification for the View. 2 Main Types include
  • Set<T> Method which can be used in a setter to allow for automatic notification, including related properties if the AffectsAttribute is set on a Property.

      bool _busy;
      public bool IsBusy { get => _busy; set => Set(ref _busy, value); }
    

  • Manual Notification: In the case you want to notify manually, in the case of some background processing or other such instance

           public async void DoWork(){
              ...
              NotifyPropertyChanged("CalculatedResult","Result");
           }