Book Image

.NET MAUI for C# Developers

By : Jesse Liberty, Rodrigo Juarez
3.7 (6)
Book Image

.NET MAUI for C# Developers

3.7 (6)
By: Jesse Liberty, Rodrigo Juarez

Overview of this book

While UI plays a pivotal role in retaining users in a highly competitive landscape, maintaining the same UI can be tricky if you use different languages for different platforms, leading to mismatches and un-synced pages. In this book, you'll see how .NET MAUI allows you to create a real-world application that will run natively on different platforms. By building on your C# experience, you’ll further learn to create beautiful and engaging UI using XAML, architect a solid app, and discover best practices for this Microsoft platform. The book starts with the fundamentals and quickly moves on to intermediate and advanced topics on laying out your pages, navigating between them, and adding controls to gather and display data. You’ll explore the key architectural pattern of Model-View-ViewModel: and ways to leverage it. You’ll also use xUnit and NSubstitute to create robust and reliable code. By the end of this book, you’ll be well-equipped to leverage .NET MAUI and create an API for your app to interact with a web frontend to the backend data using C#.
Table of Contents (18 chapters)
1
Part 1 – Getting Started
8
Part 2 – Intermediate Topics
12
Part 3 – Advanced Topics

Storing user preferences

Most apps allow a user to set preferences that can be stored on a phone and retrieved, typically when the app starts. .NET MAUI provides a service for this, easily storing key/value pairs, such as theme preferences, the last date used, the login name, and so on.

.NET MAUI provides the IPreferences interface to help store these preferences. With this, and the associated Preferences class (both in the Microsoft.Maui.Storage namespace), you can store string keys and values of any of the following types:

  • Boolean
  • Double
  • Int (int32, single, and int64)
  • String
  • DateTime

Persisting DateTime

DateTime values are stored as 64-bit integers and use the ToBinary and FromBinary methods to encode and decode respectively.

Let’s create a UserPreferences page with a short form to gather a user’s preferences. We’ll also add Button, which will display all the saved preferences and allow the user to delete one or all of...