当检测光盘驱动器被关闭 [英] Detect when CD drive was closed

问题描述

所以我做我自己一个小项目。我需要检测，如果CD驱动器被关闭，如果它是运行的功能。

So I am making a little project for myself. I need to detect if the CD Drive was closed, and if it was, run a function.

这可能吗？

推荐答案

首先，你需要定义将打开光盘托盘中的功能：

First you will need to define the function that will be opening the disk tray:

[DllImport("winmm.dll", EntryPoint = "mciSendString")]
public static extern int mciSendStringA(string lpstrCommand, string lpstrReturnString, 
                            int uReturnLength, int hwndCallback);

要关闭（或检查驱动器关闭时），你需要发送两个命令字符串磁盘驱动器

To close(or check if the drive is closed) the disk drive you need to send two command strings .

mciSendStringA("open " + driveLetter + ": type CDaudio alias drive" + driveLetter, 
                 returnString, 0, 0);
mciSendStringA("set drive" + driveLetter + " door closed", returnString, 0, 0);

该函数返回 0 如果命令是。成功地执行，否则code.So你可以有一个逻辑来检查它返回一个错误

The function returns0 if the command is successfully executed or else it returns an error code.So you can have a logic to check that.

您可以检查的功能的文件，也是一个有用的更多信息链接

You can check the documentation of the function and also a useful link for more info

这篇关于当检测光盘驱动器被关闭的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！