使后台工作人员在不冻结窗体的情况下按顺序执行多个操作

我已经问了一个类似的问题 here 但我现在有一个后续问题。

我需要连续多次启动外部程序,但我有几个问题:

• 它试图同时启动所有的操作。我放了一个空的“while”(bwksvn.isbusy)”,这有点管用,但我很肯定这会让你们中的一些人哭一点。
• 只要所有操作都没有完成,它仍然冻结窗体。考虑到其他一些这样的主题,我认为我的代码的编写方式,应用程序不是真正的多线程的,或者我没有利用它…但我真的不熟悉穿线。
• 它似乎不像我要求它做的那样。我将尝试更简单的操作,看看操作是否失败,或者后台工作人员是否从未启动。

这是密码(对不起,有点长):

private struct svnCommand
{
    public svnCommand(string args, string path, int pourcent)
    {
        this.args = args;
        this.path = path;
        this.pourcent = pourcent;
    }
    public string args;
    public string path;
    public int pourcent;
}

private BackgroundWorker bgwkSVN;

public Merger()
{
    InitializeComponent();
    InitializeBackgroundWorker();
    this.textBoxCheminRacine.Text = cheminRacine;
}

private void MergerRevisions(object sender, EventArgs e)
{

    activerControles(false);

    textBoxOutput.Text = "";
    cheminRacine = textBoxCheminRacine.Text;
    if (!cheminRacine.EndsWith("\\")) { cheminRacine = cheminRacine + "\\"; }

    string branchToMerge = this.textBoxBranche.Text;
    if (branchToMerge.StartsWith("/")) { branchToMerge = branchToMerge.Substring(1); }

    // révision(s)
    string revisions = "";
    foreach (string r in textBoxRevision.Text.Split(','))
    {
        int rev;
        if (int.TryParse(r, out rev))
        {
            revisions += string.Format(" -r {0}:{1}", rev - 1, rev);
        }
        else
        {
            revisions += " -r " + r.Replace("-", ":");
        }
    }

    // pourcentage de complétion pour chaque étape
    int stepPourcent = (int)Math.Floor((double)(100 / (3 + Directory.GetDirectories(cheminRacine + "branches").Length)));

    // merge sur le trunk
    while (bgwkSVN.IsBusy) { }
    bgwkSVN.RunWorkerAsync(new svnCommand(string.Format("merge --accept postpone {0} {1}{2} .", revisions, svnbasepath, branchToMerge), cheminRacine + "trunk", stepPourcent));


    // merge sur chaque branche
    string[] branches = Directory.GetDirectories(cheminRacine + "branches");
    foreach (string b in branches)
    {
        while (bgwkSVN.IsBusy) { }
        bgwkSVN.RunWorkerAsync(new svnCommand(string.Format("merge --accept postpone {0} {1}{2} .", revisions, svnbasepath, branchToMerge), b, stepPourcent));
    }

    // virer les mergeinfo
    while (bgwkSVN.IsBusy) { }
    bgwkSVN.RunWorkerAsync(new svnCommand("pd svn:mergeinfo . -R", cheminRacine, stepPourcent));

    // svn update
    while (bgwkSVN.IsBusy) { }
    bgwkSVN.RunWorkerAsync(new svnCommand("update", cheminRacine, stepPourcent));

    textBoxOutput.Text += Environment.NewLine + "Terminé.";
    MessageBox.Show("Merge terminé.", "Merge terminé", MessageBoxButtons.OK);

    // réactiver les champs et boutons
    activerControles(true);
}

/// <summary>
/// Set up the BackgroundWorker object by attaching event handlers
/// </summary>
private void InitializeBackgroundWorker()
{
    bgwkSVN = new BackgroundWorker();
    bgwkSVN.WorkerReportsProgress = true;
    bgwkSVN.WorkerSupportsCancellation = true;
    bgwkSVN.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
    bgwkSVN.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
    bgwkSVN.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
}

/// <summary>
/// Exécuter une commande SVN
/// </summary>
private string SVNcmd(svnCommand s, BackgroundWorker worker, DoWorkEventArgs e)
{
    string o = "";
    o += s.path + Environment.NewLine + s.args + Environment.NewLine;

    if (worker.CancellationPending)
    {
        e.Cancel = true;
    }
    else
    {
        Process p = new Process();
        p.StartInfo.WorkingDirectory = s.path;
        p.StartInfo.FileName = "svn";
        p.StartInfo.Arguments = s.args;
        p.StartInfo.CreateNoWindow = true;
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.UseShellExecute = false;
        p.Start();
        o += p.StandardOutput.ReadToEnd() + Environment.NewLine;
        p.WaitForExit();

        if (s.pourcent > 0)
        {
            worker.ReportProgress(s.pourcent);
        }
    }
    return o;
}


/// <summary>
/// Where the actual, potentially time-consuming work is done.
/// </summary>
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    // Get the BackgroundWorker that raised this event.
    BackgroundWorker worker = sender as BackgroundWorker;

    // Assign the result of the computation to the Result property of the DoWorkEventArgs
    // object. This is will be available to the RunWorkerCompleted eventhandler.
    e.Result = SVNcmd((svnCommand)e.Argument, worker, e);
}

/// <summary>
/// Deals with the results of the background operation
/// </summary>
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    // First, handle the case where an exception was thrown.
    if (e.Error != null)
    {
        MessageBox.Show(e.Error.Message);
    }
    else if (e.Cancelled)
    {
        textBoxOutput.Text += Environment.NewLine + "Annulé.";
    }
    else
    {
        textBoxOutput.Text += e.Result.ToString();
    }
}

/// <summary>
/// Updates the progress bar
/// </summary>
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    this.progressBarTraitement.Value += e.ProgressPercentage;
}

谢谢!