namespace GeovinDu.PdfViewer{    [DefaultProperty("FilePath")]    [ToolboxData("<{0}:ShowPdf runat=server>
     ")]       public class ShowPdf : WebControl    {        #region "Declarations"         //Geovin Du 塗聚文 20131010        private string mFilePath;#endregion        #region "Properties"         [Category("Source File")]        [Browsable(true)]        [Description("Set path to source file.")]        [Editor(typeof(System.Web.UI.Design.UrlEditor), typeof(System.Drawing.Design.UITypeEditor))]        public string FilePath        {            get            {                return mFilePath;            }            set            {                if (value == string.Empty)                {                    mFilePath = string.Empty;                }                else                {                    int tilde = -1;                    tilde = value.IndexOf('~');                    if (tilde != -1)                    {                        mFilePath = value.Substring((tilde + 2)).Trim();                    }                    else                    {                        mFilePath = value;                    }                }            }        }   // end FilePath property#endregion        #region "Rendering"        /// 
        ///  Geovin Du 塗聚文 20131010        /// 
        ///         protected override void RenderContents(HtmlTextWriter writer)        {            try            {                StringBuilder sb = new StringBuilder();                sb.Append("");                writer.RenderBeginTag(HtmlTextWriterTag.Div);                writer.Write(sb.ToString());                writer.RenderEndTag();            }            catch            {                // with no properties set, this will render "Display PDF Control" in a                // a box on the page                writer.RenderBeginTag(HtmlTextWriterTag.Div);                writer.Write("Display PDF Control");                writer.RenderEndTag();            }  // end try-catch        }   // end RenderContents        #endregion    }   // end class}       // end namespace  Geovin Du 塗聚文 20131010