ConstraintCollection::Add Method (Constraint^)
.NET Framework (current version)
Adds the specified Constraint object to the collection.
Assembly: System.Data (in System.Data.dll)
Parameters
- constraint
-
Type:
System.Data::Constraint^
The Constraint to add.
| Exception | Condition |
|---|---|
| ArgumentNullException | The constraint argument is null. |
| ArgumentException | The constraint already belongs to this collection, or belongs to another collection. |
| DuplicateNameException | The collection already has a constraint with the same name. (The comparison is not case-sensitive.) |
If the collection is successfully changed by adding or removing constraints, the CollectionChanged event occurs.
The following example adds a UniqueConstraint to the ConstraintCollection of a DataTable.
.NET Framework
Available since 1.1
Available since 1.1
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