Failed to load pdf document in c#

Byte[] bytes;

int orderID = Convert.ToInt32(e.CommandArgument);

var templateData = ordersBL.GetTemplateDetails(orderID);

using (MemoryStream ms = new MemoryStream())

{

using (Document document = new Document(PageSize.A4, 10, 10, 10, 10))

{

PdfWriter writer = PdfWriter.GetInstance(document, ms);

foreach (var temp in templateData.ToList())

{

string message = temp.Message;

string tempimage = Convert.ToBase64String(temp.logo);

string base64 = tempimage;

byte[] imageBytes = Convert.FromBase64String(base64);

iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(imageBytes);

if (image.Height > image.Width)

{

//Maximum height is 800 pixels.

float percentage = 0.0f;

percentage = 700 / image.Height;

image.ScalePercent(percentage * 100);

}

else

{

//Maximum width is 600 pixels.

float percentage = 0.0f;

percentage = 140 / image.Width;

image.ScalePercent(percentage * 100);

}

//only happens on the first run!

if (!document.IsOpen())

{

//Open the document for writing

document.Open();

}

document.Add(image);

using (var htmlWorker = new HTMLWorker(document))

{

//HTMLWorker doesn't read a string directly but instead needs a TextReader (which StringReader subclasses)

using (var sr = new StringReader(message))

{

//Parse the HTML

htmlWorker.Parse(sr);

}

}

Paragraph paragraph = new Paragraph();

paragraph.SpacingBefore = 10;

paragraph.SpacingAfter = 10;

paragraph.Alignment = Element.ALIGN_LEFT;

// paragraph.Font = FontFactory.GetFont(FontFactory.HELVETICA, 12f, BaseColor.GREEN);

// paragraph.Add(text);

document.Add(paragraph);

document.NewPage();

}

bytes = ms.ToArray();

document.Close();

}

}

Response.ContentType = "application/pdf";

string pdfName = "User";

Response.AddHeader("Content-Disposition", "attachment; filename=" + pdfName + ".pdf");

Response.Buffer = true;

Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);

Response.BinaryWrite(bytes);

Response.End();

Response.Close();

Response.Flush();

}