windows 如何检测何时插入 SD 卡？
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原文地址: http://stackoverflow.com/questions/583593/
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How can I detect when an SD card is plugged in?
提问by
I'm writing a PC application in C++ that needs to detect when a user connects an SD card to his/her computer. I know how to detect when the card reader is connected, but I do not know how to detect when individual cards are connected/removed.
我正在用 C++ 编写一个 PC 应用程序，它需要检测用户何时将 SD 卡连接到他/她的计算机。我知道如何检测读卡器何时连接，但我不知道如何检测单个卡何时连接/移除。
Does Windows have an IO interface to detect arrival/removal of SD cards?
Windows 是否有 IO 接口来检测 SD 卡的到达/移除？
[Update] the WM_DEVICECHANGE technique that was suggested works only for detecting when an SD Card reader is plugged in. It does not detect when individual cards are inserted into the card reader.
[更新] 建议的 WM_DEVICECHANGE 技术仅用于检测何时插入 SD 卡读卡器。它不会检测何时将单张卡插入读卡器。
回答by Dan Bystr?m
Think this is what you need:
认为这是您需要的：
http://www.codeproject.com/KB/dotnet/devicevolumemonitor.aspx
http://www.codeproject.com/KB/dotnet/devicevolumemonitor.aspx
回答by Terry
回答by Oscar Cabrero
check the messages from WM_DEVICECHANGEhere is an example
检查来自WM_DEVICECHANGE的消息这里是一个例子
回答by Michael
Look at the Windows Portable Devices API, it has functionality that allows you to attach it to an SD reader (it's known as a storage device) and get events when a card is inserted or removed.
看看 Windows 便携式设备 API，它的功能允许您将其连接到 SD 读卡器（称为存储设备）并在插入或移除卡时获取事件。
It just has two (possibly major) drawbacks:
它只有两个（可能是主要的）缺点：
- It requires Windows Vista or later
- It only has a COM API, so if you want to use it from a .NET program you either have a lot of interop ahead of you, or you have to write a wrapper in C++ or C++/CLI
- 它需要 Windows Vista 或更高版本
- 它只有一个 COM API，所以如果你想从 .NET 程序中使用它，你要么有很多互操作性，要么你必须用 C++ 或 C++/CLI 编写一个包装器
