How can I create custom validation controls in ASP.NET?

How can I create custom validation controls in ASP.NET?

You can create custom validation controls in ASP.NET by inheriting from the BaseValidator class and overriding its methods.

What methods do I need to override?

You typically need to override the IsValid property and the EvaluateIsValid method to implement your custom logic.

Can you give me an example of a custom validator?

Sure! For instance, you can create a validator that checks if a string is a valid email format by implementing the logic in EvaluateIsValid.

How do I register this custom validator in my ASP.NET page?

You can register it in your ASPX page by adding a tag for your custom validator and setting its properties like ControlToValidate and ErrorMessage.