Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

   rs.CursorLocation = ADODB.CursorLocationEnum.adUseClient

   cn.Open("provider = Microsoft.ACE.OLEDB.12.0;" & "Data Source =" & Application.StartupPath & "\bd.mdb")

   rs.Open("select * from Table1", cn, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockOptimistic)

   If cn.State = 1 Then MsgBox("connet")

   DataGridView1.DataSource = RS2DT(rs)

End Sub

Private Function RS2DT(ByVal rs As ADODB.Recordset) As DataTable
Dim dt As New DataTable
If rs.RecordCount > 0 Then
On Error Resume Next
For Each f As ADODB.Field In rs.Fields
dt.Columns.Add(f.Name, rs.Fields(f.Name).Value.GetType)
Next
For i = 1 To rs.RecordCount
Dim dr As DataRow
dr = dt.NewRow()
dt.Rows.Add(dr)
Next
For i = 0 To dt.Rows.Count - 1
For Each f As ADODB.Field In rs.Fields
dt.Rows(i)(f.Name) = rs.Fields(f.Name).Value
Next
rs.MoveNext()
Next
End If
Return dt
End Function

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Private conStr As String = "provider = Microsoft.ACE.OLEDB.12.0;" & "Data Source =" & Application.StartupPath & "\bd.mdb;"

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
   Dim sqlStr As String = "select * from Table1"
   Dim dpt As New OleDb.OleDbDataAdapter(sqlStr, conStr)
   Dim dt As New DataTable
   dpt.Fill(dt)
   DataGridView1.DataSource = dt
End Sub