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Windows Presentation Foundation Development Cookbook

You're reading from   Windows Presentation Foundation Development Cookbook 100 recipes to build rich desktop client applications on Windows

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781788399807
Length 524 pages
Edition 1st Edition
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Author (1):
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Kunal Chowdhury Kunal Chowdhury
Author Profile Icon Kunal Chowdhury
Kunal Chowdhury
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Toc

Table of Contents (13) Chapters Close

Preface 1. WPF Fundamentals 2. Using WPF Standard Controls FREE CHAPTER 3. Layouts and Panels 4. Working with Data Bindings 5. Using Custom Controls and User Controls 6. Using Styles, Templates, and Triggers 7. Using Resources and MVVM Patterns 8. Working with Animations 9. Using WCF Services 10. Debugging and Threading 11. Interoperability with Win32 and WinForm 12. Other Books You May Enjoy

How it works...

In the preceding example, the Department property has a data binding with the TextBlock control and thus the associated TextBlock displays the text returned by the property. Similarly, the PersonName property has a data binding with a TextBox control. As the data binding has been made to the Text property of the TextBlock (with TwoWay mode), it automatically updates the associated property when the user changes it in the UI.

So, when you hit the Submit button, the OnSubmit event triggers, and it directly reads the PersonName property instead of fetching the text from the UI by accessing the Text property of the TextBox control.

When you hit the Reset button, the OnReset event triggers and it sets the PersonName property to an empty string. But the UI does not change. This is because the CLR property does not have a notification mechanism to automatically update the UI when a value change happens to it.

To overcome this, WPF uses the INotifyPropertyChanged interface, which...

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