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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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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