DataColumn Constructor (String, Type)

DataColumn.DataColumn(String, Type) Constructor

Inititalizes a new instance of the DataColumn class using the specified column name and data type.

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

Public Sub New ( _
	columnName As String, _
	dataType As Type _
Dim columnName As String
Dim dataType As Type

Dim instance As New DataColumn(columnName, dataType)
public DataColumn (
	String columnName, 
	Type dataType
public function DataColumn (
	columnName : String, 
	dataType : Type
Not applicable.



A string that represents the name of the column to be created. If set to a null reference (Nothing in Visual Basic) or an empty string (""), a default name will be specified when added to the columns collection.


A supported DataType.

Exception typeCondition


No dataType was specified.

The following example creates a new DataColumn with a specified ColumnName and DataType.

Private Sub AddDataColumn(ByVal table As DataTable)
   Dim typeInt32 As System.Type = _
   Dim column As DataColumn = _
       New DataColumn("id", typeInt32)

   ' Set various properties.
   With column
      .AutoIncrement = True
      .AutoIncrementSeed = 1
      .AutoIncrementStep = 1
      .ReadOnly = True
    End With

   ' Add to Columns collection.
End Sub

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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