DataRelationCollection::Add Method (array<DataColumn^>^, array<DataColumn^>^)
.NET Framework (current version)
Creates a DataRelation with the specified parent and child columns, and adds it to the collection.
Assembly: System.Data (in System.Data.dll)
public: virtual DataRelation^ Add( array<DataColumn^>^ parentColumns, array<DataColumn^>^ childColumns )
Parameters
- parentColumns
-
Type:
array<System.Data::DataColumn^>^
The parent columns of the relation.
- childColumns
-
Type:
array<System.Data::DataColumn^>^
The child columns of the relation.
| Exception | Condition |
|---|---|
| ArgumentNullException | The relation argument is a null value. |
| ArgumentException | The relation already belongs to this collection, or it belongs to another collection. |
| DuplicateNameException | The collection already has a relation with the same name. (The comparison is not case sensitive.) |
| InvalidConstraintException | The relation has entered an invalid state since it was created. |
When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.
.NET Framework
Available since 1.1
Available since 1.1
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