How does model validation work in ASP.NET Core?

How does model validation work in ASP.NET Core?

Model validation in ASP.NET Core ensures that the data submitted by users meets specific criteria before processing.

What are the common validation attributes I can use?

Common validation attributes include [Required], [StringLength], [Range], and [RegularExpression]. They help enforce rules on model properties.

Can I create custom validation attributes?

Yes, you can create custom validation attributes by inheriting from the ValidationAttribute class and implementing the IsValid method.

How do I handle validation errors in my controller?

You can check ModelState.IsValid in your controller action. If it's false, you can return the validation errors to the view.