DataRelationCollection.Add Method

Reference

Definition

Namespace:: System.Data

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Important

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Adds a DataRelation to the DataRelationCollection.

Overloads

Add(DataRelation)	Adds a DataRelation to the DataRelationCollection.
Add(DataColumn, DataColumn)	Creates a DataRelation with a specified parent and child column, and adds it to the collection.
Add(DataColumn[], DataColumn[])	Creates a DataRelation with the specified parent and child columns, and adds it to the collection.
Add(String, DataColumn, DataColumn)	Creates a DataRelation with the specified name, and parent and child columns, and adds it to the collection.
Add(String, DataColumn[], DataColumn[])	Creates a DataRelation with the specified name and arrays of parent and child columns, and adds it to the collection.
Add(String, DataColumn, DataColumn, Boolean)	Creates a DataRelation with the specified name, parent and child columns, with optional constraints according to the value of the `createConstraints` parameter, and adds it to the collection.
Add(String, DataColumn[], DataColumn[], Boolean)	Creates a DataRelation with the specified name, arrays of parent and child columns, and value specifying whether to create a constraint, and adds it to the collection.

Add(DataRelation)

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Adds a DataRelation to the DataRelationCollection.

public:
 void Add(System::Data::DataRelation ^ relation);

public void Add (System.Data.DataRelation relation);

member this.Add : System.Data.DataRelation -> unit

Public Sub Add (relation As DataRelation)

Parameters

relation: DataRelation

The DataRelation to add to the collection.

Exceptions

ArgumentNullException

The relation parameter 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 specified name. (The comparison is not case sensitive.)

InvalidConstraintException

The relation has entered an invalid state since it was created.

Remarks

If the relation is successfully added to the collection, the CollectionChanged event occurs.

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Add(DataColumn, DataColumn)

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with a specified parent and child column, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(System::Data::DataColumn ^ parentColumn, System::Data::DataColumn ^ childColumn);

public virtual System.Data.DataRelation Add (System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn);

abstract member Add : System.Data.DataColumn * System.Data.DataColumn -> System.Data.DataRelation
override this.Add : System.Data.DataColumn * System.Data.DataColumn -> System.Data.DataRelation

Public Overridable Function Add (parentColumn As DataColumn, childColumn As DataColumn) As DataRelation

Parameters

parentColumn: DataColumn

The parent column of the relation.

childColumn: DataColumn

The child column of the relation.

Returns

DataRelation

The created relation.

Remarks

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Add(DataColumn[], DataColumn[])

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with the specified parent and child columns, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(cli::array <System::Data::DataColumn ^> ^ parentColumns, cli::array <System::Data::DataColumn ^> ^ childColumns);

public virtual System.Data.DataRelation Add (System.Data.DataColumn[] parentColumns, System.Data.DataColumn[] childColumns);

abstract member Add : System.Data.DataColumn[] * System.Data.DataColumn[] -> System.Data.DataRelation
override this.Add : System.Data.DataColumn[] * System.Data.DataColumn[] -> System.Data.DataRelation

Public Overridable Function Add (parentColumns As DataColumn(), childColumns As DataColumn()) As DataRelation

Parameters

parentColumns: DataColumn[]

The parent columns of the relation.

childColumns: DataColumn[]

The child columns of the relation.

Returns

DataRelation

The created relation.

Exceptions

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.

Remarks

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Add(String, DataColumn, DataColumn)

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with the specified name, and parent and child columns, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(System::String ^ name, System::Data::DataColumn ^ parentColumn, System::Data::DataColumn ^ childColumn);

public virtual System.Data.DataRelation Add (string? name, System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn);

public virtual System.Data.DataRelation Add (string name, System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn);

abstract member Add : string * System.Data.DataColumn * System.Data.DataColumn -> System.Data.DataRelation
override this.Add : string * System.Data.DataColumn * System.Data.DataColumn -> System.Data.DataRelation

Public Overridable Function Add (name As String, parentColumn As DataColumn, childColumn As DataColumn) As DataRelation

Parameters

name: String

The name of the relation.

parentColumn: DataColumn

The parent column of the relation.

childColumn: DataColumn

The child column of the relation.

Returns

DataRelation

The created relation.

Remarks

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Add(String, DataColumn[], DataColumn[])

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with the specified name and arrays of parent and child columns, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(System::String ^ name, cli::array <System::Data::DataColumn ^> ^ parentColumns, cli::array <System::Data::DataColumn ^> ^ childColumns);

public virtual System.Data.DataRelation Add (string? name, System.Data.DataColumn[] parentColumns, System.Data.DataColumn[] childColumns);

public virtual System.Data.DataRelation Add (string name, System.Data.DataColumn[] parentColumns, System.Data.DataColumn[] childColumns);

abstract member Add : string * System.Data.DataColumn[] * System.Data.DataColumn[] -> System.Data.DataRelation
override this.Add : string * System.Data.DataColumn[] * System.Data.DataColumn[] -> System.Data.DataRelation

Public Overridable Function Add (name As String, parentColumns As DataColumn(), childColumns As DataColumn()) As DataRelation

Parameters

name: String

The name of the DataRelation to create.

parentColumns: DataColumn[]

An array of parent DataColumn objects.

childColumns: DataColumn[]

An array of child DataColumn objects.

Returns

DataRelation

The created DataRelation.

Exceptions

ArgumentNullException

The relation name 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.

Examples

private void AddRelation()
{
    DataTable table = new DataTable();
    DataColumn column1 = table.Columns.Add("Column1");
    DataColumn column2 = table.Columns.Add("Column2");
    table.ChildRelations.Add("New Relation", column1, column2);
}

Private Sub AddRelation()
    Dim table As New DataTable()
    Dim column1 As DataColumn = table.Columns.Add("Column1")
    Dim column2 As DataColumn = table.Columns.Add("Column2")
    table.ChildRelations.Add("New Relation", column1, column2)
End Sub

Remarks

If the relation is successfully added to the collection, the CollectionChanged event occurs.

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Add(String, DataColumn, DataColumn, Boolean)

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with the specified name, parent and child columns, with optional constraints according to the value of the createConstraints parameter, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(System::String ^ name, System::Data::DataColumn ^ parentColumn, System::Data::DataColumn ^ childColumn, bool createConstraints);

public virtual System.Data.DataRelation Add (string? name, System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn, bool createConstraints);

public virtual System.Data.DataRelation Add (string name, System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn, bool createConstraints);

abstract member Add : string * System.Data.DataColumn * System.Data.DataColumn * bool -> System.Data.DataRelation
override this.Add : string * System.Data.DataColumn * System.Data.DataColumn * bool -> System.Data.DataRelation

Public Overridable Function Add (name As String, parentColumn As DataColumn, childColumn As DataColumn, createConstraints As Boolean) As DataRelation

Parameters

name: String

The name of the relation.

parentColumn: DataColumn

The parent column of the relation.

childColumn: DataColumn

The child column of the relation.

createConstraints: Boolean

true to create constraints; otherwise false. (The default is true).

Returns

DataRelation

The created relation.

Remarks

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist. To prevent this, you can set createConstraints to false.

Applies to

Add(String, DataColumn[], DataColumn[], Boolean)

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Source:: DataRelationCollection.cs

Creates a DataRelation with the specified name, arrays of parent and child columns, and value specifying whether to create a constraint, and adds it to the collection.

public:
 virtual System::Data::DataRelation ^ Add(System::String ^ name, cli::array <System::Data::DataColumn ^> ^ parentColumns, cli::array <System::Data::DataColumn ^> ^ childColumns, bool createConstraints);

public virtual System.Data.DataRelation Add (string? name, System.Data.DataColumn[] parentColumns, System.Data.DataColumn[] childColumns, bool createConstraints);

public virtual System.Data.DataRelation Add (string name, System.Data.DataColumn[] parentColumns, System.Data.DataColumn[] childColumns, bool createConstraints);

abstract member Add : string * System.Data.DataColumn[] * System.Data.DataColumn[] * bool -> System.Data.DataRelation
override this.Add : string * System.Data.DataColumn[] * System.Data.DataColumn[] * bool -> System.Data.DataRelation

Public Overridable Function Add (name As String, parentColumns As DataColumn(), childColumns As DataColumn(), createConstraints As Boolean) As DataRelation

Parameters

name: String

The name of the DataRelation to create.

parentColumns: DataColumn[]

An array of parent DataColumn objects.

childColumns: DataColumn[]

An array of child DataColumn objects.

createConstraints: Boolean

true to create a constraint; otherwise false.

Returns

DataRelation

The created relation.

Exceptions

ArgumentNullException

The relation name 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.

Remarks

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist.

Applies to

Поділитися через

DataRelationCollection.Add Method

Definition

Overloads

Add(DataRelation)

Parameters

Exceptions

Remarks

See also

Applies to

Add(DataColumn, DataColumn)

Parameters

Returns

Remarks

See also

Applies to

Add(DataColumn[], DataColumn[])

Parameters

Returns

Exceptions

Remarks

See also

Applies to

Add(String, DataColumn, DataColumn)

Parameters

Returns

Remarks

See also

Applies to

Add(String, DataColumn[], DataColumn[])

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

Add(String, DataColumn, DataColumn, Boolean)

Parameters

Returns

Remarks

See also

Applies to

Add(String, DataColumn[], DataColumn[], Boolean)

Parameters

Returns

Exceptions

Remarks

See also

Applies to

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