1. Build Windows 10 UWP MVVM Apps with Prism
Brian Noyes
@briannoyes,
Slides and Demos:

2. Visual Studio Connections
About Brian Noyes
CTO and Co-founder, Solliance
Microsoft Regional Director
Microsoft MVP
Pluralsight author
Web API Insider, Windows Azure Insider,
Window Store App Insider, C#/VB Insider t e
@briannoyes
Updates will be available at

3. UI Separation Patterns Goals
Architectural goals
Loose coupling
Separation of concerns
Leads to
Maintainability
Testability
Extensibility
Putting all your logic
here is not good enough

4. Prism Overview Framework for building XAML apps OSS
Maintainable
Testable
Extensible
OSS
Current XAML Targets
WPF
Windows 10 UWP
Xamarin Forms

5. Prism Versions
2008
2009
2010
2011
2012
2013
2014
2015
2016
Prism 1.0
Prism 2.0
Prism 4.0
Prism 5
Prism 6 for WPF
(OSS)
Prism 2.1
Prism 4.1
Prism 2.2
MVVM
PubSub
Events
PubSub
Events
Prism 6 for UWP
(OSS)
Prism for
Windows Runtime
Prism for
Universal
Apps

6. Prism 6 for UWP Relation to Previous Releases
Direct port of the Prism for Windows Runtime (Win8/8.1) versions of Prism
Some reorganization and renaming
Enhancements to leverage some new UWP features and design guidance

7. Prism for UWP Key Features
MVVM + Extensible Application Structuring
Well defined abstractions for different kinds of presentation layer code
Views, ViewModels, Models, Bootstrapping, Dependency Injection
Communications
Loosely coupled communications with events and commands
Navigation
Layers on top of native UWP navigation and integrates it into the MVVM pattern
State Management
Lets you identify cached transient objects that you want to have automatically restored when app restarts from suspension and termination
Validation
Includes a reusable infrastructure for data input validation that ties into data binding and MVVM well

8. MVVM Structuring View Data Binding ViewModel Model Model Object Model
Client Services

9. MVVM Principals Model View ViewModel
Data structures and logic to provide data for presentation
View
Just the structure of what the user sees on the screen
Static and dynamic
ViewModel
Provides data to the view for binding / presentation
Wrapped or exposed model objects
Client application state
Interaction logic

10. Prism MVVM Support Commands INotifyPropertyChanged support
PubSubEvents
InvokeCommandAction
InteractionRequest
ViewModelLocator

11. ViewModelLocator Consolidates MVVM hookup responsibilities
Select a ViewModeltype to go with a View type that is being loaded
Create an instance of that ViewModeltype
View.DataContext= ViewModel
Convention-based by default
Views live in .Views child namespace
ViewModelslive in .ViewModels child namespace
ViewModelname = View name + “ViewModel”
Uses ViewModeldefault constructor
Can override
View type to ViewModeltype mapping
Provide default factory for all ViewModeltypes
Provide factory method for individualViewModeltypes

12. MVVM and UWP Navigation
Page
Page
ViewModel
ViewModel
INavigationService
FrameNavigationService
Frame

13. Application Lifecycle Management
UWP application lifecycle states:
Not Running
Running
Suspended
ClosedByUser
Terminated
Not
Running
Launch
Running
Launch
Launch
Switch
Back
Switch
Apps
Terminated
Suspended
ClosedByUser
Low Memory
Shutdown

14. Validation UI

15. Prism Validation Support
BindableValidator
Manages a collection of errors per property for a data object
Raises events when the errors change to support data binding
Can evaluate DataAnnotations automatically
ValidatableBindableBase
Derives from BindableBase
Contains a BindableValidator
Exposes errors for data binding
Triggers validation when properties change
HighlightXYZOnErrors behaviors
Attached behaviors to show a red box on control when there are errors associated with the bound property

16. Resources e t Github.com/prismlibrary Pluralsight
@briannoyes
Resources
Github.com/prismlibrary
Pluralsight
Building Windows Store Business Apps
Slides and Demos:

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Thank you!