ForeignKeyConstraint.Columns Property

Definition

Namespace:

System.Data

Assemblies:

netstandard.dll, System.Data.Common.dll

Source:

ForeignKeyConstraint.cs

Gets the child columns of this constraint.

public:
 virtual property cli::array <System::Data::DataColumn ^> ^ Columns { cli::array <System::Data::DataColumn ^> ^ get(); };

public virtual System.Data.DataColumn[] Columns { get; }

member this.Columns : System.Data.DataColumn[]

Public Overridable ReadOnly Property Columns As DataColumn()

Property Value

DataColumn[]

An array of DataColumn objects that are the child columns of the constraint.

Examples

The following example returns an array of DataColumn objects through the Columns property.

Private Sub GetColumns()
   Dim dataColumns() As DataColumn
   Dim relation As DataRelation
   Dim i As Integer 
   ' Get the DataRelation from a DataSet.
   For Each relation In DataSet1.Relations
      If relation.GetType.ToString = _
        "System.Data.ForeignKeyConstraint" Then
        dataColumns = relation.ParentColumns
           For i = 0 To dataColumns.GetUpperBound(0)
              Console.WriteLine(dataColumns(i).ColumnName)
           Next i
      End If
   Next
End Sub

See also

• Table
• DataTable
• RelatedTable
• RelatedColumns