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

Services and Dependency Injection pitfalls

In your MVVM journey, DI plays a crucial role in providing essential functionality to your application. However, even in the world of DI, there can be pitfalls waiting to catch you off guard. This section is dedicated to unveiling the most common pitfalls and equipping you with the knowledge to navigate them effectively.

Unable to resolve service for type

A System.InvalidOperationException stating Unable to resolve service for type … is one of the most frequent exceptions when working with DI. The cause is pretty simple: we ask the DI container to resolve an instance of an object that has some dependencies that can’t be resolved. In other words, we haven’t registered all dependencies for this class. Figure 14.2 shows what this exception would look like if we didn’t register the RecipesOverviewViewModel in the DI container:

Figure 14.2: InvalidOperationException thrown

Figure 14.2: InvalidOperationException thrown

The exception...