Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterSelect

        Dim thisConnection As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\nomeDABASE.mdf;Integrated Security=True;User Instance=True")

        'Sql Query
        Dim sql As String = "SELECT * From " & e.Node.Text

        Try
            ' Open Connection
            thisConnection.Open()

            ' Create Data Adapter
            Dim da As New SqlDataAdapter(sql, thisConnection)

            ' Create and fill Dataset
            Dim ds As New DataSet

            da.Fill(ds, e.Node.Text)

            ' Get Data Table
            Dim dt As DataTable = ds.Tables(e.Node.Text)


            Me.DataGridView1.DataSource = dt

            'Questo codice serve per nascondere eventuali colonne
            Dim col As DataGridViewColumn
            For Each col In Me.DataGridView1.Columns
                If col.Name.StartsWith("id_") = True Then
                    col.Visible = False
                End If
            Next
            'Qui formattiamo la nostra DGV
            Me.DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill
            Me.DataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect
            Me.DataGridView1.MultiSelect = False

        Catch ex As SqlException
            ' Display error
            Console.WriteLine("Error: " & ex.ToString())
        Finally
            ' Close Connection
            thisConnection.Close()
            Console.WriteLine("Connection Closed")
        End Try

    End Sub