D:/Projects/Anthem/Anthem/FileUpload.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Web.UI;
using ASP = System.Web.UI.WebControls;

namespace Anthem
{
    [ToolboxBitmap(typeof(ASP.FileUpload))]
    public class FileUpload : ASP.FileUpload, IUpdatableControl
    {
        #region Unique Anthem control code

        private const string parentTagName = "span";
        protected override void Render(HtmlTextWriter writer)
        {
#if !V2
            bool DesignMode = this.Context == null;
#endif
            if (!DesignMode)
            {
                Anthem.Manager.WriteBeginControlMarker(writer, parentTagName, this);
            }
            if (Visible)
            {
                base.Render(writer);
            }
            if (!DesignMode)
            {
                Anthem.Manager.WriteEndControlMarker(writer, parentTagName, this);
            }
        }

        #endregion

        #region IUpdatableControl implementation

        [Category("Anthem")]
        [DefaultValue(false)]
        [Description("True if this control should be updated after each callback.")]
        public virtual bool AutoUpdateAfterCallBack
        {
            get
            {
                object obj = this.ViewState["AutoUpdateAfterCallBack"];
                if (obj == null)
                    return false;
                else
                    return (bool)obj;
            }
            set
            {
                if (value) UpdateAfterCallBack = true;
                ViewState["AutoUpdateAfterCallBack"] = value;
            }
        }

        private bool _updateAfterCallBack = false;

        [Browsable(false)]
        [DefaultValue(false)]
        public virtual bool UpdateAfterCallBack
        {
            get { return _updateAfterCallBack; }
            set { _updateAfterCallBack = value; }
        }

        #endregion

        #region Common Anthem control code

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            Anthem.Manager.Register(this);
        }

#if V2
        public override void RenderControl(HtmlTextWriter writer)
        {
            base.Visible = true;
            base.RenderControl(writer);
        }
#endif

        public override bool Visible
        {
            get
            {
#if !V2
                bool DesignMode = this.Context == null;
#endif
                return Anthem.Manager.GetControlVisible(this, ViewState, DesignMode);
            }
            set { Anthem.Manager.SetControlVisible(ViewState, value); }
        }

        #endregion
    }
}

---