What is Model Validation in ASP.NET Web API?
Updated Apr 28, 2026
Short answer
Model validation ensures incoming data is correct.
Deep explanation
ASP.NET Web API uses DataAnnotations and automatic validation via ApiController to validate models before processing.
Real-world example
Validating user registration inputs.
Common mistakes
- Skipping validation checks.
Follow-up questions
- What is ModelState?
- Why validation?