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DataSet Constructor ()

.NET Framework (current version)
 

Initializes a new instance of the DataSet class.

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

C#
C++
F#
VB
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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.

VB
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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
Available since 1.1
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