DataColumnCollection.Add Method (DataColumn)

Creates and adds the specified DataColumn object to the DataColumnCollection.

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

public void Add(
	DataColumn column
)

Parameters

column
Type: System.Data.DataColumn
The DataColumn to add.

ExceptionCondition
ArgumentNullException

The column parameter is null.

ArgumentException

The column already belongs to this collection, or to another collection.

DuplicateNameException

The collection already has a column with the specified name. (The comparison is not case-sensitive.)

InvalidExpressionException

The expression is invalid. See the Expression property for more information about how to create expressions.

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

The following example adds a DataColumn to a DataColumnCollection.


Private Sub AddDataColumn()
    ' Get the DataColumnCollection from a DataTable in a DataSet.
    Dim columns As DataColumnCollection = _
        DataSet1.Tables("Orders").Columns

    Dim column As DataColumn = New DataColumn
    With column
       .DataType = System.Type.GetType("System.Decimal")
       .ColumnName = "ItemPrice"
       .Caption = "Price"
       .ReadOnly = False
       .Unique = False
       .DefaultValue = 0
    End With
    columns.Add(column)
End Sub


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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