Gets or sets the date control to validate.
The date control to validate.
Use the ControlToValidate property to specify the date control to validate. This property must be set to the ID of a date control for all validation controls except for the CustomValidator control, which can be left blank. If you do not specify a valid date control, an exception will be thrown when the page is rendered. The ID must refer to a control within the same container as the validation control. It must be in the same page or user control, or it must be in the same template of a templated control.