ho provato ad impostare un datatable... ma niente da fare i dati no nvengono visualizzati, non mi da nessun errore ma se faccio partire il debug di visual studio mi da la connessione e poi pagina bianca...

cosaq sbaglio?

codice:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class apridb : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string Cnnstr = System.Configuration.ConfigurationSettings.AppSettings["CN1"].ToString();
        bool ret= false;
        DataTable Dt = new DataTable("lista");

;
        ret = clsFunctions.ExecuteSqlStatement(Cnnstr, "SELECT * FROM utente" );

        if (ret == true)
        {
            Dt.Columns.Add("username", typeof(String));
            Dt.Columns.Add("cognome", typeof(String));
            Dt.Columns.Add("nome", typeof(String));
            Dt.Columns.Add("password", typeof(String));
            Dt.Columns.Add("email", typeof(String));

           GridView1.DataSource = Dt;
           GridView1.DataBind();
            
        }
        else
        { Response.Write("Errore durante la connessione"); }
    }
}