My solution to the problem required a custom validator and a custom error Placement function, for the j Query validaiton plug-in.
First, I added a custom validator that looked at a group of check boxes that are inside a wrapping “Parent()” element.
In the first part of this chapter, you are provided with an overview of the standard validation controls included in the ASP. You learn how to control how validation errors are displayed, how to highlight validation error messages, and how to use validation groups.
What constitutes validity depends on the validation control - a Required Field Validator, for example, checks to ensure that its control's current value doesn't equal the specified property indicates the least number of Check Box List items that must be selected for validity.Ever since the first dynamic website was created, form validation has been an important subject.Getting user input through the system requires much attention, and with previous serverside scripting languages, there were no standard way of dealing with form validation.If you set a validation control's , stating: "Control 'control ID' referenced by the Control To Validate property of 'validation Control ID' cannot be validated." There may be times, however, when you need to provide validation for a Check Box or Check Box List.Many Web pages with Terms of Service include a Check Box titled "I agree to the above terms" that must be checked before continuing.