MVVM Made Easy

Paul D. SheriffPSheriff@pdsa.comwww.pdsa.com

DEV216

Paul.About

Paul D. Sheriff (psheriff@pdsa.com)President of PDSA, Inc.Author, Speaker, ArchitectCustom Software Development, Developer ToolsSoftware Auditswww.pdsa.com

Developer ToolsHaystack Code Generator

www.CodeHaystack.com.NET Productivity Framework

Agenda

What is MVVM?Why use MVVM?Demos

Starting with little Data BindingAdd More Data BindingAdd a View Model

What is MVVM?

Model-View-ViewModelModel = Data ClassView = User InterfaceViewModel (VM)

UI binds to this classVM consumes services of ModelVM may expose services/properties of Model

What is MVVM?

View knows nothing about ModelModel knows nothing about ViewModel knows nothing about View ModelView Model knows nothing about ViewCommunication from View to VM is via data binding

Lists for List Boxes and GridsIsEnabled properties for ButtonsData for Text Boxes

Why Use MVVM

Separate UI / Business / Data LogicBe able to swap out UI

Leave business rules/data logic in placeASP.NET to SilverlightWPF to Windows Phoneetc.

Unit TestingWrite less UI code

Demos

Data Binding ReviewData Binding using ClassSearching SampleViewModel for Add/Edit/Delete screen

Summary

MVVM is easyJust need an additional classHelps to understand the XAML data binding modelGreat for testing and re-usabilityDon’t worry about being “100% code-behind free”

Thank You

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Sample Code

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DEV Track Resources

Visual Studio Home Page :: http://www.microsoft.com/visualstudio/en-us

Jason Zander’s Blog :: http://blogs.msdn.com/b/jasonz/

Facebook :: http://www.facebook.com/visualstudio

Twitter :: http://twitter.com/#!/visualstudio

Somasegar’s Blog :: http://blogs.msdn.com/b/somasegar/

Resources

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Learning

Microsoft Certification & Training Resources

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TechNet

Resources for IT Professionals

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Resources for Developers

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