InfoPath Dev

 Hi,

I'm reading multiple InfoPath Textbox (set to display multiple lines) using OpenXML and generating a word document based on a template collecting data from InfoPath. I'm using following code,  the code gives error in AddMultiLineText at Paragraph p = sdt.GetFirstChild<SdtContentBlock>().GetFirstChild<Paragraph>();  I'm quite new to Infopath and OpenXML, I would appreciate some help ASAP as its holding me in my project:

Event Receiver

  public override void ItemAdded(SPItemEventProperties properties)
       {
           try
           {
               this.EventFiringEnabled = false;

               string siteUrl = properties.WebUrl;
               SPListItem item = properties.ListItem;

               SPWeb web = properties.Web;
               SPList lib = web.Lists["DocLib"];
               SPFile file = lib.RootFolder.Files["template.docx"];
               string generatedDoc = "";

               if (file != null)
               {
                   byte[] templateBytes = file.OpenBinary();

                   using (MemoryStream ms = new MemoryStream())
                   {
                       ms.Write(templateBytes, 0, (int)templateBytes.Length);

                       byte[] convertedDocBytes = ConvertInfoPathToWord(ms, item.File);

                       generatedDoc = item["LinkFilename"].ToString().Replace("xml", "docx");
                       SPFile newFile =
                         lib.RootFolder.Files.Add(generatedDoc, convertedDocBytes, true);

                       ms.Close();
                   }
               }

}

 private byte[] ConvertInfoPathToWord(MemoryStream ms, SPFile file)
       {
           byte[] bytes = file.OpenBinary();

           using (MemoryStream msInternal = new MemoryStream(bytes))
           {
               XmlDocument doc = new XmlDocument();

               doc.Load(msInternal);

               XPathNavigator root = doc.CreateNavigator();
               root.MoveToFollowing(XPathNodeType.Element);
               string ns = root.GetNamespace("my");

               XmlNamespaceManager nsMgr = new XmlNamespaceManager(new NameTable());
               nsMgr.AddNamespace("my", ns);

                string multiLineText1 = root.SelectSingleNode(
                 "/my:myFields/my:field1", nsMgr).Value;

               string multiLineText2 = root.SelectSingleNode(
                 "/my:myFields/my:field2", nsMgr).Value;

                using (WordprocessingDocument myDoc =
                 WordprocessingDocument.Open(ms, true))
               {
                   MainDocumentPart mainPart = myDoc.MainDocumentPart;

                   List<OpenXmlElement> sdtList = InfoPathToWord.GetContentControl(
                     mainPart.Document, "multilinetext1");
                   InfoPathToWord.AddMultiLineText(multiLineText1, ref sdtList);

                   List<OpenXmlElement> sdtList = InfoPathToWord.GetContentControl(
                     mainPart.Document, "multilinetext2");
                   InfoPathToWord.AddMultiLineText(multiLineText2, ref sdtList);
                    myDoc.Close();
               }
               msInternal.Close();
           }
           return ms.ToArray();
       }

        public static List<OpenXmlElement> GetContentControl(
          Document doc, string name)
        {
            List<OpenXmlElement> list = new List<OpenXmlElement>();

            List<SdtBlock> sdtList = doc.Descendants<SdtBlock>()
              .Where(s => name.Contains(s.SdtProperties.GetFirstChild<SdtAlias>()
              .Val.Value)).ToList();

            if (sdtList.Count == 0)
            {
                List<SdtRun> sdtRunList = doc.Descendants<SdtRun>()
                  .Where(s => name.Contains(s.SdtProperties.GetFirstChild<SdtAlias>()
                  .Val.Value)).ToList();

                foreach (SdtRun sdt in sdtRunList)
                {
                    list.Add(sdt);
                }

            }
            else
            {
                foreach (SdtBlock sdt in sdtList)
                {
                    list.Add(sdt);
                }
            }

            return list;
        }

        public static void AddMultiLineText(
          string multiLineText, ref List<OpenXmlElement> sdtList)
        {
            string[] lines = multiLineText.Split(new char[] { '\n' });
            if (sdtList.Count != 0)
            {
                foreach (OpenXmlElement sdt in sdtList)
                {
                    for (int i = 0; i < lines.Length; i++)
                    {
                        Paragraph p =
                          sdt.GetFirstChild<SdtContentBlock>().GetFirstChild<Paragraph>(); //this ERRORS

                        if (i == 0)
                        {
                            InfoPathToWord.WriteText(lines[i], ref p);
                        }
                        else
                        {
                            Paragraph pNext = sdt.AppendChild((Paragraph)p.Clone());
                            InfoPathToWord.WriteText(lines[i], ref pNext);
                        }
                    }
                }
            }
        }

 Some additional Information: The code above works when I use only one Multi TextBox. But it fails on multiple Textboxes.

 
Additional Info: multiLineText1 and multiLineText2 are "Plain Text Content Control" in the word template used to create the word document.