Book Image

Mastering Windows Presentation Foundation

By : Sheridan Yuen
Book Image

Mastering Windows Presentation Foundation

By: Sheridan Yuen

Overview of this book

Windows Presentation Foundation is rich in possibilities when it comes to delivering an excellent user experience. This book will show you how to build professional-grade applications that look great and work smoothly. We start by providing you with a foundation of knowledge to improve your workflow – this includes teaching you how to build the base layer of the application, which will support all that comes after it. We’ll also cover the useful details of data binding. Next, we cover the user interface and show you how to get the most out of the built-in and custom WPF controls. The final section of the book demonstrates ways to polish your applications, from adding practical animations and data validation to improving application performance. The book ends with a tutorial on how to deploy your applications and outlines potential ways to apply your new-found knowledge so you can put it to use right away.
Table of Contents (19 chapters)
Mastering Windows Presentation Foundation
About the Author
About the Reviewer
Customer Feedback

Using validation rules - To do or not to do?

In WPF, there are two different approaches for dealing with data validation. On the one hand, we have the UI-based ValidationRule classes, the Validation.Error Attached Event and the Binding.NotifyOnValidationError and UpdateSourceExceptionFilter properties and on the other, we have two code-based validation interfaces.

While the ValidationRule classes and their related validation approach work perfectly well, they are specified in the XAML and as such, are tied to the UI. Furthermore, when using the ValidationRule classes, we are effectively separating the validation logic from the data models that they are validating and storing it in a completely different assembly.

When developing a WPF application using the MVVM methodology, we work with data, rather than UI elements and so, we tend to shy away from using the ValidationRule classes and their related validation strategy directly.

Additionally, the NotifyOnValidationError and UpdateSourceExceptionFilter...