c# - 我怎样才能延迟关机直到 virtualbox 关闭

Question

我尝试在本地关闭/重启/注销等之前关闭 vbox。我尝试了一些但没有用。我的代码是:

private void VMStarter_Load(object sender, EventArgs e)
{
    ...
    ...
    ShutDownHandle.StopShutdown(this.Handle, "Virtual Box is shutting down...");
}

private void tmr_doWork_tick(object sender, EventArgs e)
{
    tmr_doWork.Enabled = false;
    Controller.closeVM();    //for
    while (!ShutDownHandle.ResetShutdown(this.Handle))
    {
        Thread.Sleep(10);
    }
    ShutDownHandle.Shutdown();
    this.Close();
}

//[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void WndProc(ref Message m)
{
    if (!systemShutdown)
        if (m.Msg == (int)EnumClass.WindowsMessageCodes.SM_SHUTTINGDOWN ||
            m.Msg == (int)EnumClass.WindowsMessageCodes.WM_ENDSESSION ||
            m.Msg == (int)EnumClass.WindowsMessageCodes.WM_QUERYENDSESSION)
        {
            tmr_Check.Enabled = false;
            //Message MyMsg = new Message();
            //MyMsg.Msg = (int)EnumClass.WindowsMessageCodes.WM_CANCELMODE;
            //base.WndProc(ref MyMsg);
            systemShutdown = true;
            tmr_doWork.Enabled = true;
            return;
        }
    base.WndProc(ref m);
}

ShutDownHandle 类:包括 StopShutdown 和 ResetShutdown 方法。我使用 ShutdownBlockReasonCreate 和 ShutdownBlockReasonDestroy 停止关闭窗口。

public static bool StopShutdown(IntPtr hWdn, string strMessage)
{
    try
    {
        if (ShutdownBlockReasonCreate(hWdn, strMessage))
        {
            return true;
        }
    }
    catch (Exception ex)
    {
        Writer.errorWrite(ex);
    }
    return false;
}

public static bool ResetShutdown(IntPtr hWdn)
{
    try
    {
        return ShutdownBlockReasonDestroy(hWdn);
    }
    catch (Exception ex)
    {
        return false;
        Writer.errorWrite(ex);
    }
    return false;
}

我在应用程序运行时点击关闭并得到这个

我该怎么办？怎么了？

Answer 1

试试这个在你的方法中 tmr_doWork_tick像这样放异步

async void tmr_doWork_Tick(对象发送者等){

//这是你的 thread.sleep();//替换为 await Task.delay(10);