问题ITEXTSHARP的UNICODEcharacterers

您好！我有一个问题，我对Unicode字符的项目！ plzz帮助我！

HtmlForm form = new HtmlForm();

        string imagepath = Server.MapPath("img");

        form.Controls.Add(GroupingGridView1);

        StringWriter sw = new StringWriter();

        Response.ContentEncoding = System.Text.Encoding.UTF8;

 

        HtmlTextWriter hTextWriter = new HtmlTextWriter(sw);

        form.Controls[0].RenderControl(hTextWriter);

        string html = HttpUtility.HtmlDecode(sw.ToString());

        string pathHTML = "c:\\test.html";

        StreamWriter filehtml = new System.IO.StreamWriter(pathHTML);

        filehtml.Write(html);

        filehtml.Dispose();

        Document Doc = new Document(PageSize.A4);

        

        string Path = Environment.GetFolderPath

        (Environment.SpecialFolder.Desktop)

        + "\\baocao.pdf";

        PdfWriter.GetInstance

        (Doc, new FileStream(Path, FileMode.Create));

        Doc.Open();

 

        iTextSharp.text.Image clogo = iTextSharp.text.Image.GetInstance(imagepath + "/slogo.jpg");

        clogo.Alignment = iTextSharp.text.Image.ALIGN_LEFT;

        BaseFont bf = BaseFont.CreateFont(@"C:\WINDOWS\Fonts\TIMES.TTF", BaseFont.IDENTITY_H, true);

        iTextSharp.text.Font fonttitle = new iTextSharp.text.Font(bf, 15);

        iTextSharp.text.Font font = new iTextSharp.text.Font(bf, 10);

        iTextSharp.text.Font fonttext = new iTextSharp.text.Font(bf, 12);

 



        Paragraph header = new Paragraph();

        header.Alignment = Element.ALIGN_CENTER;

        Paragraph text = new Paragraph();

 

        Chunk c1 = new Chunk("B谩o c谩o th峄ng k锚 thi岷t b峄?\n", fonttitle);

        Chunk c2 = new Chunk(DateTime.Now.ToShortDateString() + "\n\n", font);

        header.Add(c1);

        header.Add(c2);

        Doc.Add(clogo);

        Doc.Add(header);

        List<IElement> objects;

        var stream = new StreamReader(pathHTML, Encoding.UTF8);//.ReadToEnd();

        

        objects = iTextSharp.text.html.simpleparser.HTMLWorker.ParseToList(stream, new StyleSheet());

        Doc.NewPage();

        for (int k = 0; k < objects.Count; k++)

        {

            PdfPTable table = new PdfPTable(1);

 

            table.RunDirection = PdfWriter.RUN_DIRECTION_RTL;

            var els = (IElement)objects[k];

            //i can not add UNICODE when I ADD to DOCUMENT

            Doc.Add((IElement)objects[k]);           

        }  

            stream.Dispose();

            Doc.Close();

 

        Response.ClearContent();

        Response.ClearHeaders();

        Response.ContentType = "application/pdf";

        Response.AddHeader

        ("Content-Disposition", "attachment; filename=" + strS);

        Response.TransmitFile(strS);

        Response.End();

        //Response.WriteFile(strS);

        Response.Flush();

        Response.Clear();