ASP.NET CustomValidator

Question

Can you tell me when you will use CustomValidator. For example, I have a text box that accepts user comments. Any reason CustomValidator fits into the script and what other validators can't do or hard to do?

Answer 1

CustomValidator is designed to give you the freedom to implement your own validation logic when other validators just don't do what you need to do.

EG: when you need to perform some kind of check that does not actually require user input control (for example, checking the presence of a cookie) or if the control you want to check must follow the input rules that are too involved for other validators.

Answer 2

Your question describes the exact reason for using CustomValidator: you use it when existing validators will not do what you need. For example, there is no validator that guarantees that the value in the B text box is between the values ​​in and C. You need to do this in the code in CustomValidator.

Answer 3

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Answer 4

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