Topic 13. Data binding, styles, templates, and the MVVM pattern in WPF

Goal: get to know the WPF data binding mechanism, resources, styles, and templates; learn to create a ViewModel with change notification, commands, and validation, and to display collections with data templates and views; master the MVVM pattern, the CommunityToolkit.Mvvm library, dependency injection, and unit testing of ViewModels.

Lecture contents

1. Binding and value conversion — Data binding · Change notification · Value conversion
2. Collections, styles, and templates — Collections and data templates · Resources · Styles and triggers · Control templates
3. Validation, MVVM, and CommunityToolkit — Input validation · The MVVM pattern and commands · The CommunityToolkit.Mvvm library
4. Application composition and testing — Application composition and testing
5. Common mistakes — Common mistakes

Practice and review

• Practice — 3 worked examples with complete code and execution results
• Tasks — 30 variants, each with tasks at three difficulty levels
• Summary — conclusions, self-check questions, and useful links