Csharp:user WebControl Read Adobe PDF Files In Your Web Browser

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namespace GeovinDu.PdfViewer {     [DefaultProperty("FilePath")]     [ToolboxData("<{0}:ShowPdf runat=server></{0}:ShowPdf>")]       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"         /// <summary>         ///  Geovin Du 塗聚文 20131010         /// </summary>         /// <param name="writer"></param>         protected override void RenderContents(HtmlTextWriter writer)         {             try             {                 StringBuilder sb = new StringBuilder();                 sb.Append("<iframe src=" + FilePath.ToString() + " ");                 sb.Append("width=" + Width.ToString() + " height=" + Height.ToString() + " ");                 sb.Append("<View PDF: <a href=" + FilePath.ToString() + "</a></p> ");                 sb.Append("</iframe>");                   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