DataColumnCollection.Add Method ()

Creates and adds a DataColumn object to the DataColumnCollection.

Namespace: System.Data
Assembly: System.Data (in system.data.dll)

public DataColumn Add ()
public DataColumn Add ()
public function Add () : DataColumn

Return Value

The newly created DataColumn.

A default name ("Column1", "Column2", and so on) is given to the column.

If the collection is successfully changed by adding or removing columns, the CollectionChanged event occurs.

The following example creates and adds a new DataColumn to the DataColumnCollection of a DataTable.

Private Sub AddColumn()
    ' Get the DataColumnCollection from a table in a DataSet.
    Dim columns As DataColumnCollection = _
        DataSet1.Tables("Prices").Columns
    Dim column As DataColumn = columns.Add()

    With column
       .DataType = System.Type.GetType("System.Decimal")
       .ColumnName = "Total"
       .Expression = "UnitPrice * Quantity"
       .ReadOnly = True
       .Unique = False
    End With
End Sub

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

Community Additions

ADD
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