Add Method
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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()

Return Value

Type: System.Data::DataColumn^

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

.NET Framework
Available since 1.1
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