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Table of Contents

Data Binding

• NamedDataTemplateSelector - a DataTemplateSelector which uses the context type name to locate visual data templates.

Behaviors

• EventToCommandBehavior - used to handle a .NET event as a Command.
• PickerBindBehavior - used to data bind a Picker to a set of properties in a ViewModel.

Controls

• ItemsControl - a simple bindable template creator which will instantiate a set of Label elements or DataTemplate driven elements from a bound list. Similar to a ListView, but the produced content is not scrollable, nor does it provide any interactivity outside the generate content.

Value Converters

• DebugConverter - a value converter which outputs the Convert and ConvertBack to the debug console.
• IntegerToBooleanConverter - a value converter which converts an integer value into a boolean.
• NotBooleanConverter - a value converter which flips the value of a boolean.
• NullOrEmptyBooleanConverter - a value converter which takes an object/string and turns it into a boolean.

Collections

• GroupedObservableCollection - used to hold observable grouped collections for ListView.
• ObservableDictionary - a Dictionary which supports change notifications for bindings.
• OptimizedObservableCollection - an ObservableCollection which lets you disable change notifications for a brief period for mass updates.
• RefreshingCollection - an ObservableCollection which supports asynchronous refreshing behavior.

Extension methods

• CollectionExtensions - a set of extension methods for collection/IEnumerable types.
• ElementExtensions - extension methods for Xamarin.Forms Element types.
• ExceptionExtensions - extension methods for processing Exception types.
• TaskExtensions - extension methods for Task.

Interfaces

• IAsyncDelegateCommand - an interface to expose ExecuteAsync. Derives from IDelegateCommand.
• IDelegateCommand - an interface to expose RaiseCanExecuteChanged. This derives from ICommand.
• IDependencyService - an abstraction over a typical Service Locator such as Xamarin.Forms DependencyService.
• IMessageVisualizerService - an abstraction over a "MessageBox" display such as Xamarin.Forms Page.DisplayAlert.
• INavigationService - an abstraction for a basic navigation service using string-based keys to represent the pages you can navigate to.

Markup Extensions

• DependencyServiceExtension - a XAML extension to use DependencyService.Get<T> to fill in a property value.
• ImageResourceExtension - a XAML extension to retrieve an ImageSource from embedded resources.
• RelativeBindingContext - simpler way to capture BindingContext from one element to another.

MVVM classes

• AsyncDelegateCommand - an implementation of IAsyncDelegateCommand.
• DelegateCommand - an implementation of IDelegateCommand. Useful to avoid dependencies in your ViewModels on Xamarin.Forms.
• PropertyObserver - a fluid property observer which lets you easily monitor PropertyChange notifications on child ViewModels.
• SimpleViewModel - a base ViewModel implementation for MVVM which supports property change notifications.

Services

• DependencyServiceWrapper - a wrapper around Xamarin.Forms static DependencyService class to turn it into a service based on IDependencyService.
• FormsMessageVisualizerService - a wrapper around Xamarin.Forms Page.DisplayAlert method to turn it into a service based on IMessageVisualizerService.
• StackNavigationService - an example service which implements the included INavigationService and supports basic stack-based navigation through Xamarin.Forms.