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)
Part 1 – Getting Started
Part 2 – Intermediate Topics
Part 3 – Advanced Topics

Moving event handling to ViewModel

Suppose that when a Button is pressed, we want to handle that fact in the ViewModel, as is preferred by the Model-View-ViewModel (MVVM) pattern. However, one of the things we want to do, in response to that Button press, is to show a ProgressBar.

Handling things in ViewModel gets tricky when we want to interact with the user interface (UI). However, it can be done in a number of ways. Let’s modify the Submit button, remove its Clicked event and add a command:

    Command="{Binding SubmitCommand}"
    Text="Submit" />

We’ll create RelayCommand in ViewModel to handle the Submit Command:

private async void Submit()
  for (var i = 0.0; i < 1.0; i += 0.1)
    await LoginPage.LoginProgressBar...