method G2antt.DiscardValidateValue ()
Cancels the current validation process, and restores back the modified cells.

The DiscardValidateValue method has effect only if the CauseValidateValue property is not zero. The DiscardValidateValue method restores the values for modified cell during the validation. For instance, pressing the Cancel button during the ValidateValue event can restore the values for modified cells, using the DiscardValidateValue method.  The DiscardValidateValue automatically closes the current editor. The EditClose method can be used to programmatically closes the focused editor.