检测条形码扫描仪何时结束输入
我正在编写一个从条形码扫描仪读取输入的应用程序，我希望它的工作方式是：它作为键盘记录器工作，当输入足够快时，我知道我正在从条形码扫描仪获取输入。
现在我的问题是我不知道何时从条形码扫描仪获得最后一个字符，所以我知道我有一个最终且有效的条形码。
我的方法仅在收到字符时才会被调用，因此此时我必须检查我的字符是否是最后收到的字符。
我想要做到这一点的方法是，我在方法末尾创建一个新线程，该线程休眠 MAXIMUM_TIME_BETWEEN_CHARACTERS_FROM_BARCODE_SCANNER + 1 毫秒，唤醒后它会验证是否收到任何新字符，如果我这样做了，线程就会死亡，如果没有收到新字符，这意味着收到完整的条形码并且我可以使用它。
但通过这样做，我开始遇到各种奇怪的错误，比如执行过早终止。
谁能提出不同的解决方案？
如果相关的话，我正在用 C# 编写此内容。
I am writing an app that reads the input from a barcode scanner, the way I want it to work like is: it works as a keylogger and when the input is fast enough I know I'm getting input from the barcode scanner.
Now my problem is I don't know when I get the last character from the barcode scanner so I know I have a final and valid barcode.
My method only gets called when a character is received, so this is when I have to check if my character is the final one received.
The way I wanted to do this is, I create a new thread at the end of my method that sleeps for MAXIMUM_TIME_BETWEEN_CHARACTERS_FROM_BARCODE_SCANNER + 1 milliseoconds, after it wakes up it verifies if I received any new characters, if I did it the thread dies, if no new characters are received it means the full barcode is received and I can use it.
But by doing this I started getting all sorts of weird bugs, like execution dying prematurely.
Can anyone suggest a different solution?
I am writing this in C# if it's relevant.
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
您是否使用实际的条形码扫描仪测试过您的程序？因为根据我的经验，我使用的条形码在它扫描的字符串/数字的末尾附加换行符。
Have you tested your program with actual barcode scanner? Because from my experience the barcode which I use append newline character at the end of the string/number it scanned.
我重组了这个解决方案：
最终成功了。我仍然不知道是什么导致了我之前的错误，但在重组代码之后，我对这种方法完全没有任何问题。
I restructured this solution:
and it eventually worked. I still do not know what caused my previous errors but after restructuring the code I have had no problems with this approach at all.