ForeignKeyConstraint.Columns 属性

定义

命名空间:

System.Data

程序集:

System.Data.Common.dll

Source:

ForeignKeyConstraint.cs

获取该约束的子列。

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()

属性值

DataColumn[]

作为约束子列的 DataColumn 对象的数组。

示例

下面的示例通过 Columns 属性返回 对象的数组DataColumn。

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

另请参阅

• Table
• DataTable
• RelatedTable
• RelatedColumns