What is model state validation in ASP.NET?

What is model state validation in ASP.NET?

Model state validation in ASP.NET is the process of checking if the data submitted by a user meets the defined validation rules before processing it.

How do I implement model state validation in my application?

You can implement model state validation by using data annotations on your model properties and checking the ModelState.IsValid property in your controller.

What are some common validation attributes I can use?

Common validation attributes include [Required], [StringLength], [Range], and [EmailAddress]. These help enforce rules on user input.

Can I create custom validation attributes?

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