在窗体或窗口级别使用UseWaitCursor更容易。 一个典型的用例如下所示:

    private void button1_Click(object sender, EventArgs e)
    {

        try
        {
            this.Enabled = false;//optional, better target a panel or specific controls
            this.UseWaitCursor = true;//from the Form/Window instance
            Application.DoEvents();//messages pumped to update controls
            //execute a lengthy blocking operation here, 
            //bla bla ....
        }
        finally
        {
            this.Enabled = true;//optional
            this.UseWaitCursor = false;
        }
    }

为了获得更好的UI体验，你应该在不同的线程中使用异步。

使用下面的类，您可以使Donut的建议“异常安全”。

using (new CursorHandler())
{
    // Execute your time-intensive hashing code here...
}

类CursorHandler

public class CursorHandler
    : IDisposable
{
    public CursorHandler(Cursor cursor = null)
    {
        _saved = Cursor.Current;
        Cursor.Current = cursor ?? Cursors.WaitCursor;
    }

    public void Dispose()
    {
        if (_saved != null)
        {
            Cursor.Current = _saved;
            _saved = null;
        }
    }

    private Cursor _saved;
}

在窗体或窗口级别使用UseWaitCursor更容易。 一个典型的用例如下所示:

    private void button1_Click(object sender, EventArgs e)
    {

        try
        {
            this.Enabled = false;//optional, better target a panel or specific controls
            this.UseWaitCursor = true;//from the Form/Window instance
            Application.DoEvents();//messages pumped to update controls
            //execute a lengthy blocking operation here, 
            //bla bla ....
        }
        finally
        {
            this.Enabled = true;//optional
            this.UseWaitCursor = false;
        }
    }

为了获得更好的UI体验，你应该在不同的线程中使用异步。

我创建了一个静态异步方法。这将禁用启动操作并更改应用程序游标的控件。它将操作作为任务运行，并等待完成。控件在等待时返回给调用者。因此，即使在忙碌的图标旋转时，应用程序也能保持响应。

async public static void LengthyOperation(Control control, Action action)
{
    try
    {
        control.Enabled = false;
        Application.UseWaitCursor = true;
        Task doWork = new Task(() => action(), TaskCreationOptions.LongRunning);
        Log.Info("Task Start");
        doWork.Start();
        Log.Info("Before Await");
        await doWork;
        Log.Info("After await");
    }
    finally
    {
        Log.Info("Finally");
        Application.UseWaitCursor = false;
        control.Enabled = true;
    }

这是主窗体的代码

    private void btnSleep_Click(object sender, EventArgs e)
    {
        var control = sender as Control;
        if (control != null)
        {
            Log.Info("Launching lengthy operation...");
            CursorWait.LengthyOperation(control, () => DummyAction());
            Log.Info("...Lengthy operation launched.");
        }

    }

    private void DummyAction()
    {
        try
        {
            var _log = NLog.LogManager.GetLogger("TmpLogger");
            _log.Info("Action - Sleep");
            TimeSpan sleep = new TimeSpan(0, 0, 16);
            Thread.Sleep(sleep);
            _log.Info("Action - Wakeup");
        }
        finally
        {
        }
    }

我不得不使用一个单独的日志记录器的虚拟动作(我使用Nlog)和我的主日志记录器写入用户界面(一个富文本框)。只有在表单上的特定容器上才能显示繁忙的游标(但我没有很努力地尝试)。所有控件都有一个UseWaitCursor属性，但它似乎对我尝试的控件没有任何影响(可能是因为它们不在顶部?)

这是主日志，它显示了事情按照我们预期的顺序发生:

16:51:33.1064 Launching lengthy operation...
16:51:33.1215 Task Start
16:51:33.1215 Before Await
16:51:33.1215 ...Lengthy operation launched.
16:51:49.1276 After await
16:51:49.1537 Finally

在WPF中使用:

Cursor = Cursors.Wait;

// Your Heavy work here

Cursor = Cursors.Arrow;

对于Windows窗体应用程序，可选的禁用ui控件是非常有用的。所以我的建议是这样的:

public class AppWaitCursor : IDisposable
{
    private readonly Control _eventControl;

    public AppWaitCursor(object eventSender = null)
    {
         _eventControl = eventSender as Control;
        if (_eventControl != null)
            _eventControl.Enabled = false;

        Application.UseWaitCursor = true;
        Application.DoEvents();
    }

    public void Dispose()
    {
        if (_eventControl != null)
            _eventControl.Enabled = true;

        Cursor.Current = Cursors.Default;
        Application.UseWaitCursor = false;
    }
}

用法:

private void UiControl_Click(object sender, EventArgs e)
{
    using (new AppWaitCursor(sender))
    {
        LongRunningCall();
    }
}