ItextSharp arabic letters not showing up at all - c#

Im using the Itextsharp library to create a pdf document that contains both arabic and english letters. However, the arabic letters dont show at all!
tried other librarys like pdfsharp but to no avail. Some have suggested changing the font but im not sure exactly how to do that
Code is below
protected void BtnExportPDFReport_Click(object sender, EventArgs e)
{
System.IO.StringWriter sw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(sw);
grdShowReport.AllowPaging = false;
grdShowReport.DataBind();
grdShowReport.RenderControl(hw);
StringReader srw = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
using (MemoryStream memoryStream = new MemoryStream())
{
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, memoryStream);
pdfDoc.Open();
htmlparser.Parse(srw);
pdfDoc.Close();
byte[] bytes = memoryStream.ToArray();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=DatabaseReports.pdf");
Response.Write("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" /><style> td { mso-number-format:\\#; } </style> ");
Response.Buffer = true;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(bytes);
Response.End();
Response.Close();
}
}

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If you don't
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You will have to use 3rd party control for that
Try using iText Sharp library its free
for more info go here

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