如何在开始下一个命令之前执行多个命令等待每个命令完成？

Question

在启动下一个命令之前，我有三个命令要执行，等待每个命令完成。

根据我在完成第一个之后的实现，第二个将开始，但backgroundWorker1_RunWorkerCompleted根本不会加注。

npm install sqlite3 

Answer 1

BackgroundWorker只是一次性使用，即一旦状态完成它就不会重新启动，你需要重新实例化它。

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    command++;

    if (command < commands.Length)
    {
        backgroundWorker1 = new BackgroundWorker();
        backgroundWorker1.DoWork += this.backgroundWorker1_DoWork;
        backgroundWorker1.ProgressChanged += this.backgroundWorker1_ProgressChanged;
        backgroundWorker1.RunWorkerCompleted += this.backgroundWorker1_RunWorkerCompleted;
        backgroundWorker1.RunWorkerAsync();
    }
}