使用将文件添加到我的ListView

我想在我的应用程序中添加一个选项，将一个包含目录中所有文件的目录添加到我的ListView中，因为我在添加到ListView之前会检查每个文件(我的文件是Wiresark文件，所以我会检查文件扩展名，如果不是pcap格式，我会转换文件，然后添加(，我想用单独的线程来完成，所以我使用BackgroundWorker，我需要如何做到这一点的一些帮助：

private void btnAddDir_Click(object sender, EventArgs e)
{
    ListViewItem lv = new ListViewItem();
    string fileToAdd = string.Empty;
    List<string> filesList = new List<string>();
    BackgroundWorker backgroundWorker = null;
    DialogResult dialog = folderBrowserDialog1.ShowDialog();
    if (dialog == DialogResult.OK)
    {
        Editcap editcap = new Editcap();
        foreach (string file in SafeFileEnumerator.EnumerateFiles(folderBrowserDialog1.SelectedPath, "*.*", SearchOption.AllDirectories))
        {
            if (editcap.isWiresharkFormat(file))
            {
                filesList.Add(file);
            }
        }
        backgroundWorker = new BackgroundWorker();
        backgroundWorker.WorkerReportsProgress = true;
        backgroundWorker.DoWork +=
            (s1, e1) =>
            {
                foreach (string fileName in filesList)
                {
                    if (editcap.isWiresharkFormat(fileName))
                    {
                        if (editcap.isLibpcapFormat(fileName))
                        {
                            lv.Text = fileName;
                            lv.SubItems.Add(fileName);
                            lv.SubItems.Add("Waiting");
                            this.Invoke((MethodInvoker)delegate
                            {
                                lvFiles.Items.Add(lv);
                            });
                            lvFiles.Refresh();
                        }
                    }
                }
            };
        backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(
        (s1, e1) =>
        {
        });
        backgroundWorker.RunWorkerAsync();
    }
}