Book Image

The MVVM Pattern in .NET MAUI

By : Pieter Nijs
Book Image

The MVVM Pattern in .NET MAUI

By: Pieter Nijs

Overview of this book

In today's fast-paced world of modern software development, teams need to be efficient, productive, and capable of rapidly adapting to changes to deliver high-quality products, making it crucial for developers to write maintainable and easy-to-test code. The MVVM Pattern in .NET MAUI helps you to thoroughly explore the Model-View-View Model (MVVM) design pattern. The chapters show you how this pattern helps in structuring code to embrace the separation of concerns, allowing for loosely coupled user interface and application logic, which ultimately empowers you to write more robust, maintainable, and testable code. The book also highlights .NET MAUI's capabilities and features, and enables you to delve into the essential components within the framework that facilitate the application of the MVVM pattern. With the help of a sample application, this definitive guide takes a hands-on approach to walk you through both the essential and advanced usages of the MVVM pattern to ensure that you successfully apply the practical aspects of the pattern to your .NET MAUI projects. By the end of this book, you’ll have gained a comprehensive understanding of the MVVM design pattern and its relevance in the context of .NET MAUI, as well as developed the skills needed to successfully apply it in practice.
Table of Contents (20 chapters)
Free Chapter
1
Part 1: Key Concepts and Components
8
Part 2: Building a .NET MAUI App Using MVVM
13
Part 3: Mastering MVVM Development

The ICollectionChanged interface

The ICollectionChanged interface provides a powerful mechanism for notifying the UI about changes in a collection itself, rather than on individual items within the collection. By implementing this interface, a collection can raise events that inform the binding engine and UI elements about structural changes, such as additions, removals, or modifications to the collection itself.

While it is possible to assign an updated list of items to a property on your ViewModel and trigger the PropertyChanged event, dynamically changing a collection requires a more optimal approach. By utilizing a collection that implements the INotifyCollectionChanged interface, we can achieve more efficient rendering of the UI. Instead of needing to re-render the entire collection on the UI, the binding engine can perform updates in a more optimized manner, resulting in improved performance and responsiveness.

The ICollectionChanged interface defines the CollectionChanged...