Invalid nested tag div found, expected closing tag input

Hello all,

I've been experimenting on how to print html document using the said 3rd party software called iTextSharp. iTextSharp is a popular tool and has several examples on the internet regarding integration to the project and occurring issues. One of the issue I encountered is Invalid nested div tag and is expecting a closing tag input. As I trace back my html source, the tags are well-formed except that they are self closing tags such as <input>, <hr>, <img>, <br> or the like. These tags when passed to an action method as string are not properly closed and thus an issue is thrown by iTextSharp's XMLWorkerHelper's ParseXHtml() method.

<img src="~/Images/success.png" /> 
<input type="hidden" name="OrderStatusHTML" />
<input type="submit" id="btnSubmit" value="Export to PDF" class="btn btn-success" />

The solution I came up with is to fix the page source using HTMLAgilityPack which is to explicitly close the tags by assigning HtmlElementFlag.Closed enum to HtmlNode.ElementsFlag["img"] dictionary.

[HttpPost]
[ValidateInput(false)]
public FileResult ExportToPDF(string OrderStatusHTML)
{
 HtmlNode.ElementsFlags["img"] = HtmlElementFlag.Closed;
 HtmlNode.ElementsFlags["input"] = HtmlElementFlag.Closed;
 HtmlDocument doc = new HtmlDocument();
 doc.OptionFixNestedTags = true;
 doc.LoadHtml(OrderStatusHTML);
 OrderStatusHTML = doc.DocumentNode.OuterHtml;

 using (MemoryStream stream = new System.IO.MemoryStream())
 {
  Encoding unicode = Encoding.UTF8;
  StringReader sr = new StringReader(OrderStatusHTML);
  Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
  PdfWriter writer = PdfWriter.GetInstance(pdfDoc, stream);
  pdfDoc.Open();
  XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);
  pdfDoc.Close();
  return File(stream.ToArray(), "application/pdf", "OrderStatus.pdf");
 }
}

That's it.. :-D