The constraint value can only be obtained if it was set with the one of the SetConstraint methods or a formula was set with one of the SetConstraintFormula methods and the formula equals a constant value, such as =5.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
OneConstraintDataValidationRule Class
OneConstraintDataValidationRule Members
Overload List
SetConstraint(Double) Method
TryGetConstraint(DateTime) Method
TryGetConstraint(TimeSpan) Method
SetConstraintFormula(String,String) Method
SetConstraintFormula(String,String,WorkbookFormat,CellReferenceMode,CultureInfo) Method