解析Windows设备的驱动器号路径 [英] Resolve Windows device path to drive letter

问题描述

如何解析NT样式的设备路径，例如\Device\CdRom0，为其逻辑驱动器号，例如G:\吗?

How do you resolve an NT style device path, e.g. \Device\CdRom0, to its logical drive letter, e.g. G:\ ?

卷名与设备路径不同，因此不幸的是GetVolumePathNamesForVolumeName()无法使用.

A Volume Name isn't the same as a Device Path so unfortunately GetVolumePathNamesForVolumeName() won't work.

推荐答案

希望以下代码可以为您提供足够的解决方案-初始化后，您只需遍历集合即可找到您的匹配项.您可能需要先将所有内容转换为大写/小写，然后再插入集合中以帮助提高查询性能.

Hopefully the following piece of code will give you enough to solve this - after you've initialised it, you just need to iterate through the collection to find your match. You may want to convert everything to upper/lower case before you insert into the collection to help with lookup performance.

typedef basic_string<TCHAR> tstring;
typedef map<tstring, tstring> HardDiskCollection;

void Initialise( HardDiskCollection &_hardDiskCollection )
{
    TCHAR tszLinkName[MAX_PATH] = { 0 };
    TCHAR tszDevName[MAX_PATH] = { 0 };
    TCHAR tcDrive = 0;

    _tcscpy_s( tszLinkName, MAX_PATH, _T("a:") );
    for ( tcDrive = _T('a'); tcDrive < _T('z'); ++tcDrive )
    {
        tszLinkName[0] = tcDrive;
        if ( QueryDosDevice( tszLinkName, tszDevName, MAX_PATH ) )
        {
            _hardDiskCollection.insert( pair<tstring, tstring>( tszLinkName, tszDevName ) );
        }
    }
}

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