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Asked: 2026-05-11T01:35:59+00:00

In ASP.NET 2, I’ve used Field Validators, and RequiredField validators, but I’m unsure of

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In ASP.NET 2, I’ve used Field Validators, and RequiredField validators, but I’m unsure of how to handle a case like this.
I have two check boxes on a page, and I need to be sure that at least one of them is set. So, if you look at in binary, it can be 01, 10 or 11, but it can not be 00. My question is, what the best way to do this with checkboxes?

Can the normal ASP Validators handle this, or would I need to create an integer value like mentioned above, hidden somewhere and use a RangeValidator do a test to make sure THAT value is never zero?

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  1. Worst case you can write a CustomValidator the can do whatever you like. Sounds like what you need is along the lines of:

    isValid = Check1.Checked | Check2.Checked

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