Dataset represents a collection of data retrieved from the Data Source.. The OleDbDataAdapter object allows us to populate DataTable in a DataSet. We can use Fill method in the OleDbDataAdapter for populating data in a Dataset. The Dataset can contain more than one Table at a time. The data set may comprise data for one or more members, corresponding to the number of rows.
In some situations we have to find the column headers in a DataTable. There is a ColumnsCollection object in the Datatable hold the column Definitions.
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 dt As DataTable
Dim sql As String
Dim i As Integer
connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Your mdb filename;"
sql = "Your SQL Statement Here"
connection = New OleDbConnection(connetionString)
Try
connection.Open()
oledbAdapter = New OleDbDataAdapter(sql, connection)
oledbAdapter.Fill(ds, "OLEDB Temp Table")
oledbAdapter.Dispose()
connection.Close()
dt = ds.Tables(0)
For i = 0 To dt.Columns.Count - 1
MsgBox(dt.Columns(i).ColumnName)
Next
Catch ex As Exception
MsgBox("Can not open connection ! ")
End Try
End Sub
End Class