protected override void Render(Writer writer)
        {
            writer.AddAttribute("class", "FilterBoxDiv");
            writer.RenderBeginTag("div");

            if (!string.IsNullOrWhiteSpace(ID))
            {
                writer.AddAttribute("id", UniqueID);
            }

            foreach (string key in Style.Keys)
            {
                writer.AddStyleAttribute(key, Style[key]);
            }

            if (!string.IsNullOrEmpty(CssClass))
            {
                writer.AddAttribute("class", CssClass);
            }

            writer.RenderBeginTag("details");

            if (ActiveStyle != null && Active)
            {
                writer.AddAttribute("class", ActiveStyle.CssClass);
            }

            writer.RenderBeginTag("summary");
            writer.RenderEndTag();

            writer.RenderBeginTag("div");
            LiveFilterBox.Attributes.Add("onkeyup", string.Format("keyup_handlerFilterControl2(this,'{0}')", CheckBoxList.ClientID));
            LiveFilterBox.Attributes.Add("placeholder", " поиск ");
            LiveFilterBox.RenderControl(writer);

            writer.AddAttribute("class", "FilterboxTable");
            CheckBoxList.RenderControl(writer);

            writer.RenderEndTag();
            writer.AddAttribute("class", "ApplyPanel");
            writer.RenderBeginTag("div");

            ApplyButton.RenderControl(writer);
            CancelButton.RenderControl(writer);

            writer.RenderEndTag();
            writer.RenderEndTag();
            writer.RenderEndTag();
        }