What is validation in ASP.NET Core?

What is validation in ASP.NET Core?

Validation in ASP.NET Core is the process of ensuring that user input meets certain criteria before processing it.

How can I implement model validation in my ASP.NET Core application?

You can implement model validation using data annotations or by creating custom validation attributes in your models.

Can you give me an example of using data annotations for validation?

Sure! You can use attributes like [Required], [StringLength], and [Range] on your model properties to enforce validation rules.

What happens if validation fails?

If validation fails, the model state will be invalid, and you can return error messages to the user to correct their input.