Data.DB.TField.HasConstraints
Delphi
property HasConstraints: Boolean read GetHasConstraints default False;
C++
__property bool HasConstraints = {read=GetHasConstraints, default=0};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | published | Data.DB.pas Data.DB.hpp |
Data.DB | TField |
Description
Indicates whether field values are constrained.
Read HasConstraints to determine whether the field component imposes custom constraints, imported constraints, or a default expression. HasConstraints is true if the CustomConstraint, DefaultExpression, or ImportedConstraint property is set. Otherwise, HasConstraints is false, indicating that no constraints on field values are implemented.
Field values can still be limited when HasConstraints is false. For example, an edit mask or OnValidate event handler can constrain field values.