Eventing In Dynamic Controls

Question

Hi guys,

I've not worked with anything but simply controls for a year or two and so am a bit rusty and need some help.

I want to allow a usder to create a product categories structure, with a parent child relationship which can be any depth.

To thsi end I want to create a control to represent a level with a listbox to show the sections and buttons to add,edit and delete. These controls will be dynmicaly added and removed depending. I have some basic code to test the eventing side of things which is not working. The structure is.

Page -> ProductCategoryCollection -> ProductCategoryView

I want to fire an event with a command argument and have it receivied on the page. Please can you let me know why this code is not working.

Cheers

Steve

    using System;
using System.Web.UI;
using System.Web.UI.WebControls;


namespace WhiteLabelCMS.Products
{
    public partial class ManageProductCategories : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {



        }
        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            var pcv = new ProductCategoryCollection();
            pcv.ButtonClick += HandleEvent;
            phProductCatViews.Controls.Add(pcv);
        }

        public void HandleEvent(object sender,CommandEventArgs e)
        {
            Response.Write("Button " + e.CommandArgument +" clicked");
        }
    }

    public class ProductCategoryCollection : WebControl
    {
        public event CommandEventHandler ButtonClick;

        public ProductCategoryCollection()
        {
            for (int count = 0; count < 3; count++)
            {
                var pcv = new ProductCategoryView(count);

                pcv.EditButtonClick+=(PcvEditButtonClick);
                Controls.Add(pcv);
            }
        }

        public void PcvEditButtonClick(object sender, CommandEventArgs e)
        {
            ButtonClick(sender, e);
        }

        public int ProductLevelCount
        {
            get
            {
                if (ViewState["ProductLevelCount"] != null)
                    return (int)ViewState["ProductLevelCount"];

                return 1;
            }
            set { ViewState["ProductLevelCount"] = value; }

        }

    }

    public class ProductCategoryView : WebControl
    {
        public event CommandEventHandler EditButtonClick;
        protected Button _editButton;

        public ProductCategoryView(int level)
        {
            Level = level;
            CreateControls();
        }

        private void CreateControls()
        {
            _editButton = new Button { Text = "Edit", CommandArgument = Level.ToString(), ID = "btnEdit_" + Level };
            _editButton.Command+=(EditButtonClick);
            Controls.Add(_editButton);
        }

        public int Level
        {
            get
            {
                if (ViewState["LevelCount"] != null)
                    return (int)ViewState["LevelCount"];

                return 1;
            }
            set { ViewState["LevelCount"] = value; }

        }


    }
}