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DataSet Constructor

DataSet Constructor

Initializes a new instance of the DataSet class.

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

public DataSet()

This implementation of the DataSet constructor takes no parameters, and creates a default name, "NewDataSet," for the new instance.

A name for the DataSet is required to ensure that the XML representation of the DataSet always has a name for the document element, which is the highest-level element in a schema definition.

The following example creates a new DataSet, and adds two DataTable objects to it.


Private Sub CreateDataSet()
    Dim dataSet As DataSet = New DataSet

    ' Create two DataTable objects using a function.
    Dim table1 As DataTable = MakeTable("idTable1", "thing1")
    Dim table2 As DataTable = MakeTable("idTable2", "thing2")
    dataSet.Tables.Add(table1)
    dataSet.Tables.Add(table2)
    Console.WriteLine(dataSet.Tables.Count)
End Sub


Private Function MakeTable(c1Name As String, _
    c2Name As String) As DataTable
    Dim table As New DataTable

    ' Add two DataColumns
    Dim column As DataColumn = New DataColumn( _
        c1Name, System.Type.GetType("System.Integer"))
    table.Columns.Add(column)
    column = New DataColumn(c2Name, _
        System.Type.GetType("System.String"))
    MakeTable = table
End Function


.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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