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

Frequent custom control and converter problems

Most of the issues that arise when working with custom controls regularly have to do with bindable properties. Often, a small typo or a little oversight might cause your custom control to not react as expected or to display the wrong data.

Troubleshooting bindable properties

On a custom control, there is a lot of ceremony needed to define bindable properties. It’s very easy to make a mistake that is very hard to spot when troubleshooting. Here are a couple of things to look out for:

  • The propertyName parameter in the Create method: Make sure the propertyName parameter matches the exact naming of the property:
    public static readonly BindableProperty
      IsFavoriteProperty =
        BindableProperty.Create(nameof(IsFavorite), …);
    public bool IsFavorite
    {
        ...
    }

    As this code sample shows, it is advised to use the nameof expression to prevent typos!

  • The returnType parameter...