动态生成页面返回数据的问题--十万火急！

  可能很初级的问题，把我难倒了，各位一定要帮我！dudu我把问题发到提问区没人理所以只好到首页放一放

  我作了一个层次结构的类，然后想用这个层次结构动态生成页面，页面是生成了，可作了一些操作以后点按钮却什么也没有了。
  具体问题如下：

  首先，因为数据现在是不定的，所以我将数据封装到一个带有结构的类中：

    public class Privileges
    {
        public Dictionary<int,Panel> Panels;
    private DataSet PriDs;
    private Classid;
        public Privileges(string obj, string id)
        {
            init(obj,id);
        }
        private void init(string obj,string id)
        {
        //dosome thing for init ,for example PriDs
        
            MakePanels();
        }

        private void MakePanels()
        {
            Panels = new Dictionary<int,Panel>();
            string name, id;
            DataTable dt;
            for (int i = 0; i < PriDs.Tables.Count; i++)
            {
                dt = PriDs.Tables[i];
                name = dt.Rows[0]["className"].ToString();
                id = dt.Rows[0]["classID"].ToString();
                Panels.Add(i, new Panel(dt, name, id));
            }
        }
     public class Panel
        {
            public string Name;
            public string ID;
            public Dictionary<int, Group> Groups;

            public Panel(DataTable dt,string name,string id)
            {
                this.Name = name;
                this.ID = id;
                MakeGroups(dt);
            }

            private void MakeGroups(DataTable dt)
            {
                Groups = new Dictionary<int,Group>();
                string name, id, elementstruct, value, type,cnname;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    name = dt.Rows[i]["name"].ToString();
                    cnname = dt.Rows[i]["cnname"].ToString();
                    id = dt.Rows[i]["privilegeid"].ToString();
                    elementstruct = dt.Rows[i]["code"].ToString();
                    type = dt.Rows[i]["controltype"].ToString();
                    value = dt.Rows[i]["value"].ToString();
                    Groups.Add(i, new Group(name,cnname, id, elementstruct, value, type));
                }
            }
        }
        public class Group
        {
            public string Name;
            public string CnName;
            public string ID;
            public string Value;
            public string Type
            {
                get
                {
                    return type;
                }
                set
                {
                    if (value != "DropDownList" && value != "CheckBoxList" && value != "RadioButtonList")
                    {
                        type = "CheckBoxList";
                    }
                    else
                    {
                        type = value;
                    }
                }
            }
            public Dictionary<int, Element> Elements;
            private string type;
            private string ElementStruct;

            public Group(string name,string cnname,string id,string elementStruct,string value,string type)
            {
                this.Name = name;
                this.CnName = cnname;
                this.ID = id;
                this.ElementStruct = elementStruct;
                this.Value = value;
                this.Type = type;
                Elements = new Dictionary<int,Element>();
                MakeLeafs();
                
            }

            public void MakeLeafs()
            {
                string[] structure = ElementStruct.Split(';');
                ListDictionary valueList=new ListDictionary();
                string[] valueStr = Value.Split(',');
                for (int i = 0; i < valueStr.Length; i++)
                {
                    valueList.Add(valueStr[i],i);
                }
                for (int i=0; i < structure.Length; i++)
                {
                    string[] NameID = structure[i].Split(',');
                    string leafName = NameID[0];
                    string leafID = NameID[1];
                    if(valueList[leafID]!=null)
                    {
                        Elements.Add(i,new Element(leafName,leafID,true));
                    }else
                    {
                        Elements.Add(i, new Element(leafName, leafID, false));
                    }
                }
            }
        }
        public class Element
        {
            public string Name;
            public string ID;
            public bool State;
            public Element(string name, string id, bool state)
            {
                this.Name = name;
                this.ID = id;
                this.State = state;
            }
        }
    }    

然后，我将这个类传递给页面，页面通过遍历将其格式化显示出来

public partial class testOrg_testDB : System.Web.UI.Page
{
    DataTable dt = new DataTable();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.PReport.Visible = false;
            initDDL();       
        }
    }

    private void initDDL()
    {
        for (int i = 0; i < 4; i++)
        {
            this.DropDownList1.Items.Add(Privileges.objStruct[i]);
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string id = this.TextBoxCode.Text;
        string obj = this.DropDownList1.SelectedValue;
        ViewState["id"] = id;
        ViewState["obj"] = obj;
        if (id == "")
        {
            this.PReport.Visible = false;
        }
        else
        {
            this.PReport.Visible = true;
            Privileges Prl = new Privileges(obj, id);
            initOrg(Prl);
        }
    }
    private void initOrg(Privileges p)
    {
        for (int i = 0; i < p.Panels.Count; i++)
        {
            //@panel
            PReport.ID = "Panel"+p.Panels[i].ID;
            PReport.Header.Text=p.Panels[i].Name;
            for (int j = 0; j < p.Panels[i].Groups.Count; j++)//@group
            {
                WebGroupBox pp = new WebGroupBox();
                pp.Text = p.Panels[i].Groups[j].CnName;
                pp.ID = "Wgb"+p.Panels[i].Groups[j].ID;//@groupid
                pp.Controls.Add(makeElements(p.Panels[i].Groups[j]));//@makeElements
                PReport.Controls.Add(pp);
            }
        }
        
    }
    private ListControl makeElements(Privileges.Group g)//@element
    {
        string type = g.Type.ToLower();
        ListControl lc;
        if (type == "dropdownlist")
        {
            lc = new DropDownList();
        }
        else if (type == "radiobuttonlist")
        {
            lc = new RadioButtonList();
        }
        else if (type == "checkboxlist")
        {
            lc = new CheckBoxList();
        }
        else
        {
            throw new Exception("invalid data");
        }
        for (int i = 0; i < g.Elements.Count; i++)
        {
            ListItem li = new ListItem(g.Elements[i].Name, g.Elements[i].ID);
            if (g.Elements[i].State == true)
            {
                li.Selected = true;
            }
            lc.Items.Add(li);
        }
       return lc;


    }
        
    protected void ButtonUpdata_Click(object sender, EventArgs e)
    {
        //    for (int j = 0; j < PReport.Controls.Count; j++)//@groups
        //    {
        //        Control group = PReport.Controls[j];
        //        string groupid = group.ID;
        //        string value = string.Empty;                
        //        for (int m = 0; m < group.Controls.Count; m++)//@elementlist
        //        {
        //            Control lc = (ListControl)group.Controls[m];
                    
        //        }
        //    }

        //}


    }
    
}

问题：当我点更新返回的时候，发现我所new出来的control全都没有了！（可能代码写的很烂，为了避免大家头疼，我把代码简化了一点）
解决：我通过msdn发现原来由于dom本身就是扁平的（呵呵，我自己这么说，提法有点业余）所以需要通过一个NamingContainer属性来访问下级控件，可是俺找了半天也没有找到这样的方法，msdn中的示例是空的，郁闷...
如果改用Repeater我以前写的好多业务类（是我考虑了很久才写出来的）还得重新写