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

Popups and dialogs

It is not uncommon to want to alert the user to a condition or change or to get back a bit of data from the user with an alert, as shown in Figure 4.22:

Figure 4.22 – The Alert dialog

To keep things clean, remove the Editor and its associated Label from LoginPage.xaml and remove the constructor and ICommand from ViewModel. We won’t need them in the final version.

The DisplayAlert object can only be called from a page. Later, you’ll see how to handle SubmitCommand on the Button in ViewModel and send a message to the page to show the alert. For now, let’s keep things simple, and change the Button’s SubmitCommand to an event:

    Text="Submit" />

The event handler is placed in the code-behind file. Notice...