Lesson 3: Validating Data Annotations Programmatically in C#
*Lesson 3: Validating Data Annotations Programmatically in C
In this lesson you build a console application to show you can do data validation in any C# application. You build a reusable helper class to perform validation on a class with data annotations.
*Content*
Lesson Objectives 00:00
DEMO: Create a Console Application Using Visual Studio 2022 00:19
DEMO: Create a Console Application Using VS Code 01:12
Classes for Generic Validation 02:33
The ValidationResult Class 03:10
DEMO: Create a Validation Helper Class 03:49
DEMO: Add and Validate a Product Class 05:39
The [Required] Attribute 08:04
DEMO: Using the [Required] Attribute 08:32
Other Useful Return Values 09:17
DEMO: Add Other Methods to the Validation Helper Class 10:27
Lesson Summary 12:57
*Useful Links*
Samples and hands-on labs for this course:
The ValidationAttribute class:
Minimal Web API Development course:
The [Required] Attribute:
The ErrorMessage Property:
*Paul.About()*
Hello, my name is Paul D. Sheriff and I have a passion for teaching. I have been training developers for over 35 years through books, videos, article, blog posts, and international conferences and user groups.
*Paul.Contact()*
Website:
Email: psheriff
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