带有列表 <字符串> 的 LoadControl 用户控件

Question

我需要将我从 AD 查询生成的字符串列表加载到 Web 用户控件中，但它不起作用。当我点击查看按钮时，页面被刷新，没有别的。这是我的代码：

默认.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; }
    }

用户控件视图.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" %>

Answer 1

如果您希望数据在回发之间保持不变，则需要将列表存储在会话中。

因此，无论何时您在列表中添加或删除数据，都可以从会话 NewresultsFromQuery = (List<string>)Session["newResult"]; 中获取当前列表

然后，当您更新 NewresultsFromQuery 后，将其放回会话中

Session["newResult"] = NewresultsFromQuery