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Learn WinUI 3.0

You're reading from   Learn WinUI 3.0 Leverage the power of WinUI, the future of native Windows application development

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781800208667
Length 440 pages
Edition 1st Edition
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Author (1):
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Alvin Ashcraft Alvin Ashcraft
Author Profile Icon Alvin Ashcraft
Alvin Ashcraft
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Table of Contents (20) Chapters Close

Preface 1. Section 1: Introduction to WinUI and Windows Applications
2. Chapter 1: Introduction to WinUI FREE CHAPTER 3. Chapter 2: Configuring the Development Environment and Creating the Project 4. Chapter 3: MVVM for Maintainability and Testability 5. Chapter 4: Advanced MVVM Concepts 6. Chapter 5: Exploring WinUI Controls 7. Chapter 6: Leveraging Data and Services 8. Section 2: Extending WinUI and Modernizing Applications
9. Chapter 7: Fluent Design System for Windows Applications 10. Chapter 8: Building WinUI Apps with .NET 5 11. Chapter 9: Enhancing Applications with the Windows Community Toolkit 12. Chapter 10: Modernizing Existing Win32 Applications with XAML Islands 13. Section 3: Build and Deploy on Windows and Beyond
14. Chapter 11: Debugging WinUI Applications with Visual Studio 15. Chapter 12: Hosting an ASP.NET Core Blazor Application in WinUI 16. Chapter 13: Building, Releasing, and Monitoring Applications with Visual Studio App Center 17. Chapter 14: Packaging and Deploying WinUI Applications 18. Assessments 19. Other Books You May Enjoy

Performing data validation with MVVM

Support for data validation is common in modern development frameworks. If an application or website doesn't alert users about which input fields are invalid, those users will file bug reports, leave bad reviews, or worse… stop using the app/website.

Web developers who use ASP.NET Core, Angular, and React have rich validation support at their disposal. UWP developers have never had built-in support for data validation, but that is changing with the move to WinUI 3.0. Simple validation can be added to our ViewModel properties through a little boilerplate code and a few attributes.

A little bit of code needs to be added to our BindableBase class, which is what all the ViewModel classes will inherit from. This will bring validation support to every ViewModel. The code for this can be found in the specifications for WinUI: https://github.com/microsoft/microsoft-ui-xaml-specs/blob/user/lucashaines/inputvalidation/active/InputValidation...

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