Protected Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click
        If GridView1.SelectedIndex = -1 Then Exit Sub
        Dim TBordine As New DataTable
        querytemp = "Select * from Ordinazione where sessione = '" + ViewState("key") + "' order by numero"
        sqlcommand = New SQLiteCommand(querytemp, conn)
        TBordine.Load(sqlcommand.ExecuteReader)
        If TBordine.Rows.Count = 0 Then
            Dim prezzo As String = FormatNumber(GridView1.SelectedRow.Cells(4).Text, 2)
            prezzo = Replace(prezzo, ",", ".")
            querytemp = "Insert Into Ordinazione (sessione, numero,descrizione,maxi,prezzo,prz_supp,tot_pizza) VALUES ('" + ViewState("key") + "'," & TBordine.Rows.Count & ",'" + GridView1.SelectedRow.Cells(1).Text + "',1, '" & prezzo & "','','')"
        Else
            Dim prezzo As String = FormatNumber(GridView1.SelectedRow.Cells(4).Text, 2)
            prezzo = Replace(prezzo, ",", ".")
            querytemp = "Insert Into Ordinazione (sessione, numero,descrizione,maxi,prezzo,prz_supp,tot_pizza) VALUES ('" + ViewState("key") + "'," & TBordine.Rows(TBordine.Rows.Count - 1).Item(1) + 1 & ", '" + GridView1.SelectedRow.Cells(1).Text + "',1, '" & prezzo & "','','')"
        End If
        sqlcommand = New SQLiteCommand(querytemp, conn)
        sqlcommand.ExecuteNonQuery()
        querytemp = "Select * from ORdinazione where sessione = '" + ViewState("key") + "' order by numero"
        sqlcommand = New SQLiteCommand(querytemp, conn)
        TBordine.Clear()
        TBordine.Load(sqlcommand.ExecuteReader)
        GridView2.DataSource = TBordine
        GridView2.DataBind()
        Call formato_gridview2()
    End Sub