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How to multiple tables in Dataset - OLEDB Data Source

The DataSet contains DataTableCollection and their DataRelationCollection. The DataTableCollection contains zero or more DataTable objects. The OleDbDataAdapter object allows us to populate DataTables in a DataSet. We can use Fill method in the OleDbDataAdapter for populating data in a Dataset. We can populate Dataset with more than one table at a time using OleDbDataAdapter Object . The following VB.NET source code shows how to a single OleDbDataAdapter fill Dataset with multiple tables.




Imports System.Data.OleDb
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim connetionString As String
        Dim connection As OleDbConnection
        Dim oledbAdapter As OleDbDataAdapter
        Dim ds As New DataSet
        Dim firstSql As String
        Dim secondSql As String
        Dim i As Integer
        connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Your mdb filename;"
        firstSql = "Your First SQL Statement Here"
        secondSql = "Your Second SQL Statement Here"
        connection = New OleDbConnection(connetionString)
        Try
            connection.Open()
            oledbAdapter = New OleDbDataAdapter(firstSql, connection)
            oledbAdapter.Fill(ds, "First Table")
            oledbAdapter.SelectCommand.CommandText = secondSql
            oledbAdapter.Fill(ds, "Second Table")
            oledbAdapter.Dispose()
            connection.Close()
            'retrieve first table data
            For i = 0 To ds.Tables(0).Rows.Count - 1
                MsgBox(ds.Tables(0).Rows(i).Item(0) & "  --  " & ds.Tables(0).Rows(i).Item(1))
            Next
            'retrieve second table data
            For i = 0 To ds.Tables(1).Rows.Count - 1
                MsgBox(ds.Tables(1).Rows(i).Item(0) & "  --  " & ds.Tables(1).Rows(i).Item(1))
            Next
        Catch ex As Exception
            MsgBox("Can not open connection ! ")
        End Try
    End Sub
End Class

connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Your mdb filename;"
firstSql = "Your First SQL Statement Here"
secondSql = "Your Second SQL Statement Here"

You have to replace the string with your real time variables.







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