Presenter: Sergiy Beslik

Prism - Composite Application Guidance for WPF and Silverlight

What is Composite Application?

Composite Application consists of loosely coupled modules that can be developed independently, discovered at runtime and work together.

What is Prism?

Prism is a set of guidance designed to help building composite UI applications with WPF and Silverlight.

Application

Client

Server

Database

Prism

What is Prism?

Library Reference Implementation Guidelines Quick-Starts

Prism Core Concepts

Modules UI Composition Dependency Injection Events and Commands Separated Presentation

Patterns Multi-targeting

Modules

Unit of development– Modules can be developed and tested independently by

different teams. Unit of deployment

– Modules can be loaded on demand, minimizing application start-up time.

– Modules can be added or changed without re-building the whole application.

Bootstrapper

Bootstrapper

Module A

public class ModuleA : IModule { public void Initialize() {

UI Composition

Views from multiple modules are displayed at run time in specific locations within the application's UI.

<TabControl RegionManager.RegionName = “MainContentRegion” />

Module A

<ItemsControl RegionManager.RegionName= “NavigationRegion">

Module B

View Discovery vs. View Injection

Views can be instantiated automatically when region is displayed, or explicitly injected into region.

Dependency Injection

ClassA

ObjectBuilder

ClassB

«interface»IClassB

«creates»

«uses»

«creates»

ClassA ServiceLocator

ClassB

«interface»IClassB

«uses»

«creates»

Dependency Injection Pattern Service Locator Pattern

Events and Commands

Delegate Command– Implements delegate-based

Command pattern Composite Command

– Implements multiple handlers command routing

Event Aggregator– Implements publishing and

subscribing to loosely coupled events

Event Aggregator

Event Aggregator is a mediator service that allows decoupling of publishers and subscribers.

Module A

eventAggregator.GetEvent<MyEvent>().Publish(eventArgs)

eventAggregator.GetEvent<MyEvent>().Subscribe(MyEventHandler, ThreadOption.UIThread, false, MyEventFilter);

Module B

Separate Presentation Patterns

Model-View-Controller (MVC) Model-View-Presenter (MVP) Presentation Model (PM) Model-View-ViewModel (MVVM)

View Controller

Model

Model-View-Controller

View Presenter

Model

Model-View-Presenter

Model-View-ViewModel Pattern

Vie

w

Vie

wM

odel

Mod

el

Data binding

ICommand

Read

Write

Update events

Prism Reference Implementation

Demo…

Prism Releases

Prism 1.0 – WPF, July 2008 Prism 2.0 – WPF & Silverlight 2.0, Feb 2009 Prism 2.1 – WPF & Silverlight 3.0, Oct 2009 Prism 2.2 – WPF & Silverlight 4.0, May 2010 Prism 4.0 – WPF & Silverlight 4.0, beta version is

available

What’s new in Prism 4.0

WPF 4.0 Support More ViewModel Pattern Guidance Managed Extensibility Framework (MEF) Support Guidance For Out of Browser Applications Application Structure Patterns & Navigation

Useful links

MSDN Magazine article “Patterns For Building Composite Applications With WPF”: http://msdn.microsoft.com/en-us/magazine/cc785479.aspx

MSDN Magazine article “WPF Apps with the Model-View-ViewModel Design Pattern”: http://msdn.microsoft.com/en-us/magazine/dd419663.aspx

PowerPoint presentation and video from Patterns & Practices Symposium in Kiev, September 2010: http://www.techdays.in.ua/videos/2897.html

Download latest version of Prism: http://compositewpf.codeplex.com/releases/view/46046

Thank You!

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