[ToolboxData("<{0}:CustomCheckBoxList runat=server></{0}:CustomCheckBoxList>")]
    public class CustomCheckBoxList : CheckBoxList, IRepeatInfoUser
    {
        private short _index;
        private string _data_field_class;
               
        public short TabIndex
        {
            get
            {
                return this._index;
            }
            set
            {
                this._index = value;
            }
        }

        public string DataClassField
        {
            get 
            {
                return this._data_field_class;
            }
            set 
            {
                this._data_field_class = value;
            }
        }
       

         void IRepeatInfoUser.RenderItem(ListItemType itemType, int
            repeatIndex, RepeatInfo repeatInfo, HtmlTextWriter writer)
        {   
            string[] array = this.Items[repeatIndex].Text.Split(new char[] {'#'});

            CheckBox cb = new CheckBox();
            cb.Page = this.Page;
            cb.ID  = this.ClientID + "_" + repeatIndex.ToString();
            cb.Text = array[0].Trim();  
            cb.Attributes["value"] = this.Items[repeatIndex].Value;
            cb.Checked = this.Items[repeatIndex].Selected;
            cb.TextAlign = this.TextAlign;
            cb.AutoPostBack = this.AutoPostBack;
            cb.TabIndex = this.TabIndex;
            cb.Enabled = this.Enabled;
            cb.EnableViewState = this.EnableViewState;
             
            cb.CssClass = array[1].Trim();

            cb.RenderControl(writer);             
        }         
    }