Determines whether the control specified by the BaseValidator.ControlToValidate property is a valid control.
true if the control specified by BaseValidator.ControlToValidate is a valid control; otherwise, false.
The BaseValidator.ControlPropertiesValid method is a helper method used primarily by the BaseValidator.PropertiesValid property to determine whether the BaseValidator.ControlToValidate property contains a valid input control. To be a valid input control, the BaseValidator.ControlToValidate property must be set to some value and that value must be a control on the page that supports validation.
This method is used primarily by control developers.