public void UploadCaseAttachmentButton_Clicked(object sender, ClickedEventArgs e)
        {
            WriteToDebug("Upload Case Attachment Button Clicked");                                    
            UploadCaseAttachments();
            SaveCase();
        }
 



private void UploadCaseAttachments()
        {
            WriteToDebug("Uploading Case Attachments...");
            XPathNodeIterator caseAttachments = this.MainDataSource.CreateNavigator().Select("/my:myFields/my:Details/my:Attachment", NamespaceManager);
                      

            if (caseAttachments != null)
            {
               
                {

                    string attachmentFile = caseAttachments.Current.SelectSingleNode("my:AttachmentFile", NamespaceManager).Value;
                    string attachmentDescription = caseAttachments.Current.SelectSingleNode("my:AttachmentDescription", NamespaceManager).Value;

                    if (attachmentFile != null && !string.IsNullOrEmpty(attachmentFile))
                    {
                        // Decode the InfoPath file attachment
                        InfoPathAttachmentDecoder dec = new InfoPathAttachmentDecoder(attachmentFile);

                        string fileName = dec.Filename;
                        WriteToDebug(string.Format("Uploading case attachment file: {0}", fileName));
                        byte[] data = dec.DecodedAttachment;

                        // Add the file to a document library
                        using (SPSite site = new SPSite(SPContext.Current.Site.ID))
                        {
                            using (SPWeb web = site.OpenWeb())
                            {
                                web.AllowUnsafeUpdates = true;
                                site.AllowUnsafeUpdates = true;
                                SPList docLib = web.Lists["Case Attachments"];
                                SPFile file = web.Files.Add(docLib.RootFolder + "/" + fileName, data, true);
                                file.Item["Title"] = attachmentDescription;
                                file.Item["Case Id"] = GetCaseId();

                                SPFieldUrlValue linkValue = new SPFieldUrlValue();

                                linkValue.Description = fileName;
                                linkValue.Url = string.Format("{0}/Lists/Case%20Attachments/{1}", web.Url, HttpUtility.UrlEncode(fileName).Replace("+", "%20"));

                                file.Item["Link"] = linkValue;
                                file.Item.Update();
                                web.AllowUnsafeUpdates = false;
                                site.AllowUnsafeUpdates = false;
                                web.Close();
                            }
                            site.Close();
                        }                        
                    }
                    else
                    {
                        WriteToDebug("Removing empty attachment");
                        caseAttachments.Current.DeleteSelf();
                    }

                                   
                }

                int attachmentCount = caseAttachments.Count;

                if (attachmentCount > 0)
                {
                    XPathNavigator firstAttachment =
                    MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Details/my:Attachment[1]",
                    NamespaceManager);

                    XPathNavigator lastAttachment =
                    MainDataSource.CreateNavigator().SelectSingleNode("/my:myFields/my:Details/my:Attachment[" +
                    attachmentCount.ToString() + "]",
                    NamespaceManager);

                    firstAttachment.DeleteRange(lastAttachment);
                }

                this.DataConnections["Case Attachments"].Execute();
            }
            
        }