public static void FindXtandemSourceXml(ListView lvDatFiles)
        {
            lvDatFiles.BeginUpdate();
            try
            {
                foreach (ListViewItem item in lvDatFiles.Items)
                {
                    string xmlFile = item.Text;
                    if (File.Exists(xmlFile))
                    {
                        while (item.SubItems.Count < 2)
                        {
                            item.SubItems.Add("");
                        }

                        item.SubItems[1].Text = new FileInfo(XTandemSpectrumXmlParser.GetSourceFile(xmlFile)).Name;
                    }
                }
            }
            finally
            {
                lvDatFiles.EndUpdate();
            }
        }