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

Customizing the error template

In addition to the essential Errors and HasError properties, the Validation class also declares an ErrorTemplate Attached Property of type ControlTemplate. The default template assigned to this property is responsible for defining the red rectangle that surrounds UI fields that have validation errors associated with them.

However, this property enables us to change this template and so, we are able to define how validation errors are highlighted to the application users. As this property is an Attached Property, this effectively means that we could apply a different template to be displayed for each control in the UI. However, this cannot be recommended, because it could make the application look less consistent.

This template actually uses an Adorner element to render its graphics in the adorner layer on top of the related control in error. Therefore, in order to specify where our error visual(s) should be rendered in relation to the related control, we need...