我有一个C＃应用程序，有用户登录到它，因为哈希算法是昂贵的，它需要一点时间做。我怎样才能显示等待/忙状态光标（通常是沙漏）给用户，让他们知道程序正在做什么？

I have a C# application that has users login to it, and because the hashing algorithm is expensive, it takes a little while to do. How can I display the Wait/Busy Cursor (usually the hourglass) to the user to let them know the program is doing something?

该项目是在C＃。

推荐答案

您可以使用Cursor.Current.

// Set cursor as hourglass
Cursor.Current = Cursors.WaitCursor;

// Execute your time-intensive hashing code here...

// Set cursor as default arrow
Cursor.Current = Cursors.Default;

但是，如果散列操作的真正的漫长（MSDN这个定义为超过2-7秒），你应该使用其他视觉反馈指示器比光标以通知用户进展。为了更深入的一套指南，请参见这篇文章。

However, if the hashing operation is really lengthy (MSDN defines this as more than 2-7 seconds), you should probably use a visual feedback indicator other than the cursor to notify the user of the progress. For a more in-depth set of guidelines, see this article.

编辑： 正如@Am指出的那样，你可能需要调用 Application.DoEvents（）; 在 Cursor.Current = Cursors.WaitCursor; ，以确保实际显示沙漏。

As @Am pointed out, you may need to call Application.DoEvents(); after Cursor.Current = Cursors.WaitCursor; to ensure that the hourglass is actually displayed.