Protected Sub Page_LoadComplete(sender As Object, e As System.EventArgs) Handles Me.LoadComplete
        If Not Page.IsPostBack Then
            Dim data As String = Request.QueryString("data") ..qui non mi carica il valore dell'href
            gw_Presenze.DataSource = CreateDataSource(Albergo.CodAlbergo, data)
            gw_Presenze.DataBind()
        End If
    End Sub