指定的参数超出了有效值的范围。参数名称索引

Question

在处理遗留的ASP.NET WebForms应用程序时，我偶然发现了以下错误：＆＃34;指定的参数超出了有效值的范围。参数名称索引＆＃34;。我有一个带有gridview的Tabcontainer，其中包含用户全名和2个ButtonField（编辑和查看）。当我单击View with RowCommand时，将生成另外5个选项卡，其中包含来自AD的所有用户信息。一切正常，直到我回到用户选项卡并单击另一个用户名。如何让我的页面删除为第一个用户创建的新5个标签，并为新用户添加5个新标签？谢谢

   <ajax:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</ajax:ToolkitScriptManager>
<ajax:TabContainer ID="TabContainer1"  OnInit="TabContainer1_Init" runat="server" ActiveTabIndex = "0" ScrollBars="Vertical">
    <ajax:TabPanel runat="server" HeaderText="Users" ID="TabPanel1">
    <ContentTemplate>
      <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width= "850px" Height = "650px" onrowcommand = "GridView1_RowCommand" >
    <Columns>
 <asp:BoundField DataField="name" HeaderText="Name"/>
<asp:BoundField DataField="SamAccountName" HeaderText="Username" />
<asp:BoundField DataField="EmailAddress" HeaderText="EmailAddress" />
<asp:ButtonField CommandName = "View" ImageUrl ="~/Resources/Images/view.gif" ButtonType = "Image"/>
<asp:ButtonField CommandName = "Edit" ImageUrl ="~/Resources/Images/edit.gif" ButtonType = "Image"/>
          </Columns>
        </asp:GridView>
           <Triggers>
<asp:AsyncPostBackTrigger ControlID="TabContainer1" EventName="ActiveTabChanged" />
             </Triggers>
    </ContentTemplate>  
   </ajax:TabPanel>
   </ajax:TabContainer>

 protected void Page_Load(object sender, EventArgs e)
    { if (!IsPostBack)
        {
              mydata();
        }
            }


    public void mydata()
    {
        t = Regex.Replace(ldap, @"CN=[^,]*,* *", "", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);

        try
        {

            List<string> allUsers = new List<string>();
            PrincipalContext ctx = new PrincipalContext(ContextType.Domain, "IDEA.COM", t);
            UserPrincipal usr = new UserPrincipal(ctx);


            // Create a PrincipalSearcher object.
            PrincipalSearcher ps = new PrincipalSearcher(usr);
            PrincipalSearchResult<Principal> fr = ps.FindAll();
            GridView1.DataSource = fr;

            GridView1.DataBind();
        }
        catch (Exception ex)
        {
        }
    }
 protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
         int row = int.Parse(e.CommandArgument.ToString());
                item = GridView1.Rows[row].Cells[1].Text;
                var username = GridView1.Rows[row].Cells[0].Text;
                string firstname = username.Remove(username.IndexOf("."));
                DirectoryEntry de = new DirectoryEntry();
                de.Path = "LDAP://idea.com";
                DirectorySearcher objADSearcher = new DirectorySearcher(de);
                de.AuthenticationType = AuthenticationTypes.Secure;
                objADSearcher.SearchRoot = de;
                objADSearcher.Filter = "(SAMAccountName=" + item + ")";
                SearchResult results = objADSearcher.FindOne();            
            if (e.CommandName == "View")
            { if (results.ToString() != "") {int flags = Convert.ToInt32(results.Properties["userAccountControl"][0].ToString());
 if (Convert.ToBoolean(flags & 0x0002)){Response.Write("<script> alert ('" + "Account Disabled for more then 90 days" + "') </script>");
           else
                    {WindowsIdentity wi = new WindowsIdentity(item);
  foreach (IdentityReference group in wi.Groups)
              {
             try
               {
     result1.Add(group.Translate(typeof(NTAccount)).ToString());
        result1.Sort();
               }
   catch (Exception ex) { }
                        }
  string tabid;
    AjaxControlToolkit.TabPanel apptab = new AjaxControlToolkit.TabPanel();
   apptab.HeaderText = firstname + " " + "Application";
apptab.ID = string.Format("Tab{0}{1}",suffix, "tab1");
  AjaxControlToolkit.TabPanel sharedtab = new AjaxControlToolkit.TabPanel();
 sharedtab.HeaderText = firstname + " " + "SharedCommon"; sharedtab.ID = string .Format ("Tab{0}{1}",suffix ,"tab2" );AjaxControlToolkit.TabPanel grouptab = new AjaxControlToolkit.TabPanel();grouptab.HeaderText = firstname + " " + "Internet/RAS";
grouptab.ID = string.Format("Tab{0}{1}",suffix, "tab3");
    AjaxControlToolkit.TabPanel idtab = new AjaxControlToolkit.TabPanel();idtab.HeaderText = firstname + " " + "Info";
  idtab.ID = string.Format("Tab{0}{1}",suffix, "tab4");
                TabContainer1.Tabs.Add(grouptab);
                        TabContainer1.Tabs.Add(apptab);
                        TabContainer1.Tabs.Add(sharedtab);
                        TabContainer1.Tabs.Add(idtab);}}}