无法移动文件，因为它被另一个进程使用

Question

我想在打印后移动文件。我正在使用FileSystemWatcher。

private void Do_Automatic()
{
    FileSystemWatcher watcher = new FileSystemWatcher();
    watcher.Path = Properties.Settings.Default.Chemin; 
    /* Watch for changes in LastAccess and LastWrite times, and
    the renaming of files or directories. */
    watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
    // Only watch text files.
    watcher.Filter = Properties.Settings.Default.Type_Fichier;

    // Add event handlers.
    //watcher.Changed += new FileSystemEventHandler(OnChanged);
    watcher.Created += new FileSystemEventHandler(OnChanged);          

    // Begin watching.
    watcher.EnableRaisingEvents = true;

    // Wait for the user to quit the program.
    //Console.WriteLine("Press \'q\' to quit the sample.");
    //while (Console.Read() != 'q') ;
}

// Define the event handlers. 
private  void OnChanged(object source, FileSystemEventArgs e)
{                     
    //MessageBox.Show("File: " + e.FullPath + " " + e.ChangeType);
    DoSaveNPrint();
}

private  void DoSaveNPrint()
{
    try
    {
        string CheminBoite = Properties.Settings.Default.Chemin;
        if (String.IsNullOrEmpty(CheminBoite))
        {
            MessageBox.Show("Chémin boite est vide");
        }
        else
        {
            DirectoryInfo di = new DirectoryInfo(CheminBoite);
            FileInfo[] rgFiles = di.GetFiles();

            foreach (FileInfo fi in rgFiles)
            {
                switch (Properties.Settings.Default.Type_Donne)
                {
                    case "35-SOCAH":
                        Outils.Put_CSVtoSQL_SOCAH(CheminBoite + "\\" + fi.Name, Id); 
                        break;
                    case "50-LISM":
                        Outils.Put_CSVtoSQL_LISM(CheminBoite + "\\" + fi.Name, Id);
                        break;
                    default:
                        Outils.Put_CSVtoSQL(CheminBoite + "\\" + fi.Name, Id);
                        break;
                }

                Dictionary<string, int> oDict = Outils.GetDataOrdre();
                Outils.Print_BonEticket(true, Outils.Get_RightPrinter(Properties.Settings.Default.Zebra), oDict["NO_ORDRE"], oDict["NBR_COLIS"]);

                string SourceFile = CheminBoite + "\\" + fi.Name;
                string DestiFile = @"C:\Soft8_Donne\Histo\" + DateTime.Now.ToString("dd_MM_yyyy__hh_mm_ss___") + fi.Name;
                WaitForFile(SourceFile, DestiFile);
            }

            GetData();
            Outils.Insrt_Journax(sql_InstJounaux, Outils.Get_ComputerName().Trim(), "GetDataNPrint", 3, "3", "Reussi");
            if (!Properties.Settings.Default.Is_Auto) 
            {
                MessageBox.Show("La sauvegarde a été effectuée"); 
            } 
        }
    }
    catch (Exception excThrown)
    {
        MessageBox.Show(excThrown.Message + Environment.NewLine + "Veuillez prevenir France alliance ");
        Outils.Insrt_Journax(sql_InstJounaux, Outils.Get_ComputerName().Trim(), "problème GetDataNPrint", 3, "3", excThrown.Message);
    }
}

/// <summary>
/// Blocks until the file is not locked any more.
/// </summary>
/// <param name="fullPath"></param>
bool WaitForFile(string fullPathSource, string fullPathDesti)
{
    int numTries = 0;
    while (true)
    {
        ++numTries;
        try
        {    
            File.Move(fullPathSource, fullPathDesti);
            return true;
        }
        catch (Exception ex)
        {
            MessageBox.Show(String.Format("WaitForFile {0} failed to get an exclusive lock: {1}", fullPathSource, ex.ToString()));

            if (numTries > 10)
            {
                MessageBox.Show(String.Format("WaitForFile {0} giving up after 10 tries", fullPathSource));
                return false;
            }

            // Wait for the lock to be released
            System.Threading.Thread.Sleep(500);
        }
    }                       
}

使用我当前的代码，我收到错误，因为该文件正由另一个进程使用。