C# 如何将光驱盘符从 D: 更改为 Z:

Question

我正在尝试编写一种方法，将 CDROM 驱动器从字母 D 更改为字母 Z，但对 WMI 没有任何运气。还有其他方法可以使用 C# 来做到这一点吗？

public void setVolCDROM()
{
    SelectQuery queryCDROM = 
        new SelectQuery("SELECT * FROM Win32_cdromdrive");
    ManagementObjectSearcher searcherCDROM = 
        new ManagementObjectSearcher(queryCDROM);
    foreach(ManagementObject cdromLetter in searcherCDROM.Get())
    {
        MessageBox.Show(cdromLetter["Drive"].ToString() + "\n"
            + cdromLetter["Manufacturer"].ToString());
        if (cdromLetter["Drive"].ToString() == "D:")
        {
            cdromLetter["Drive"] = "Z:";                        
            cdromLetter.Put();
        }
    }
}

Answer 1

我不了解 WMI，但您可以使用 winapi 更改驱动器盘符，这里有一个示例，我将（只是您需要的部分）移植到 C#

[DllImport("kernel32.dll", SetLastError = true)]
static extern bool GetVolumeNameForVolumeMountPoint(string
    lpszVolumeMountPoint, [Out] StringBuilder lpszVolumeName,
    uint cchBufferLength);

[DllImport("kernel32.dll")]
static extern bool DeleteVolumeMountPoint(string lpszVolumeMountPoint);

[DllImport("kernel32.dll")]
static extern bool SetVolumeMountPoint(string lpszVolumeMountPoint,
    string lpszVolumeName);

const int MAX_PATH = 260;

private void ChangeDriveLetter()
{
    StringBuilder volume = new StringBuilder(MAX_PATH);
    if (!GetVolumeNameForVolumeMountPoint(@"D:\", volume, (uint)MAX_PATH))
        Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());

    if (!DeleteVolumeMountPoint(@"D:\"))
        Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());

    if (!SetVolumeMountPoint(@"Z:\", volume.ToString()))
        Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}

小心运行此代码，您必须在将驱动器安装点分配给新盘符之前删除驱动器安装点，这可能会导致问题出在原代码上：

/*****************************************************************
WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING  

   This program will change drive letter assignments, and the    
   changes persist through reboots. Do not remove drive letters  
   of your hard disks if you do not have this program on floppy  
   disk or you might not be able to access your hard disks again!
*****************************************************************/

Answer 2

杰森，您可以使用 Win32_Volume< /code>类

试试这个代码

    ManagementObjectSearcher disks = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Volume WHERE DriveLetter = 'D:'");
    foreach (ManagementObject disk in disks.Get())
    {
        disk.Get();
        disk["DriveLetter"] = "Z:";
        disk.Put();
    }

Answer 3

谢谢罗德里戈！这正是我所寻找的。我只是在它前面添加了一些 wmi 代码，以便我可以确保我正在获取 CDROM 驱动器。

public void setCDROM(){
                SelectQuery queryCDROM =
                        new SelectQuery("SELECT * FROM Win32_cdromdrive");
                ManagementObjectSearcher searcherCDROM =
                        new ManagementObjectSearcher(queryCDROM);
                int i = 0;
                foreach(ManagementObject cdromLetter in searcherCDROM.Get())
                {
                    // if stement in place to handle if there is more than one cdrom drive
                    // this will only handle the first cdrom drive encountered 
                    i = i + 1;
                    if (i == 1)
                    {
                        // run the ChangeDriveLetter method passing the drive letter string
                        ChangeDriveLetter(cdromLetter["Drive"].ToString());
                    }
                }
}

Answer 4

我认为 WMI 的 SelectQueries 应该只读取/查询信息，而不执行任何更新。我可能是错的，但我认为要更改驱动器号，您应该在某些 Win32 Api 中降低驱动器号...

Answer 5

请参阅 IOCTL_MOUNTMGR_CREATE_POINT。

祝你好运。

Answer 6

我只想在 Rodrigoq 的解决方案中添加一条注释，即在 Vista 及更高版本中，您将需要以提升的权限运行应用程序，否则您将无法删除挂载点并为其分配新的驱动器号，这将导致要抛出的异常。