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

Enabling interactions on custom controls

In real-world applications, controls often serve dual roles – they both display data and allow users to interact with it. In this section, we’ll further enhance our FavoriteControl to not only support user interactions through IsFavoriteChangedCommand but also to facilitate two-way data binding. These features will make the control more interactive and further align it with MVVM concepts. We want to allow users to tap the Image on the FavoriteControl. When FavoriteControl’s IsEnabled property is set to true, the IsFavorite property will be updated and IsFavoriteChangedCommand will be executed.

Let’s take a look at the first part of this functionality – updating the IsFavorite property when a user taps on the image and making sure the value bound to this property gets updated as well.

User actions and reflecting state

To start with, let’s add the ability for users to toggle their favorite state...