loadcontrolusercontrol与列表<字符串>

我需要加载从AD查询生成的字符串列表到Web userControl，但它不起作用。当我点击查看按钮时，页面会被刷新，仅此而已。下面是我的代码:

default . aspx

if (e.CommandName == "View")
{
    WindowsIdentity wi = new WindowsIdentity(item);
    foreach (IdentityReference group in wi.Groups)
    {
        try
        {
            result1.Add(group.Translate(typeof(NTAccount)).ToString());
      result1.Sort();
        }
        catch (Exception ex)
        { }
     }
     View f2 = new View(result1);
Session["newResult"] = result1;
     Page.LoadControl("~/View.ascx");
 }
 public List<string> NewResult
    {
        get
        {
            if (Session["NewResult"] == null)
            {
                Session["NewResult"] = new List<string>();
            }
            return (List<string>)Session["NewResult"];
        }
        set { Session["NewResult"] = value; }
    }

用户控件View.ascx

Namespace Rap.Web
{
    public partial class View : System.Web.UI.UserControl
    {
        public View()
        {}

        public View(List<string> NewresultFromQuery)
        {
             NewresultFromQuery  = (List<string>)Session["newResult"];//NullReference error
        }
        protected void Page_Load(object sender, EventArgs e)
        { 
            //create tabs from List<strings>
        }
    }
}

View.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="View.ascx.cs" Inherits="Rap.Web.View" %>
<ajax:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"
</ajax:ToolkitScriptManager>
<ajax:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="1" 
Width="1016px">
</ajax:TabContainer>
MyUserApp.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MyUserApp.aspx.cs" Inherits="Rap.Web.MyUserApp" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<%@ Reference Control="View.ascx" %>