How to Create and Use Validation Rules - WPF TUTORIALS

Learn how to create and use a custom ValidationRule in a WPF application. I also discuss how validation rules compare to INotifyDataErrorInfo.

TIMESTAMPS:
0:00 - Introduction
0:22 - Demo Introduction
1:10 - Creating a ValidationRule
3:11 - Using ValidationRules
4:16 - Showing an Error Message
6:02 - Checking for Validation Errors in the UI
7:33 - ValidationRule vs. INotifyDataErrorInfo
9:44 - Conclusion

OTHER LINKS:

[clickdraw]

Boss level tutorials. You're the best Sean. One Day I hope to understand things as much as you do.

[andy]

Simple and to the point. Thanks for this high quality tutorial.

[jahsonbalbuena]

I just recently touch C# again, back then windows forms are prevalent, I just got introduced to an MVVM pattern and got stuck somehow in the validation, this tutorial is really straightforward, thank you so much for this.

[altair]

Where do you get method OnPropertyChanged from? My compiler doesn't recognize it

[ivandrofly]

6:50 - Bind to "attached property" in WPF

[ivandrofly]

9:30 means if the ValidationRules returns false no value will be set to the property that the validationrules is handling validation for.

[jametime]

How would I combine/replace FluentValidation's AbstractValidator with an inherited implementation of ValidationRule ? So I can use it in my controller as well as in a ViewModel

[steveradstock]

Your content is great, but your presentation is way too fast.