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: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+
OneConstraintDataValidationRule Class
OneConstraintDataValidationRule Members
Overload List
SetConstraint(DateTime) Method
TryGetConstraint(Double) Method
TryGetConstraint(TimeSpan) Method
SetConstraintFormula(String,String) Method
SetConstraintFormula(String,String,WorkbookFormat,CellReferenceMode,CultureInfo) Method