[DllImport("kernel32.dll", SetLastError=true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetVolumePathNamesForVolumeNameW(string lpszVolumeName,
char [] lpszVolumePathNames, uint cchBuferLength,
ref UInt32 lpcchReturnLength);
[DllImport("kernel32.dll", SetLastError=true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetVolumePathNamesForVolumeNameW(
[MarshalAs(UnmanagedType.LPWStr)]
string lpszVolumeName,
[MarshalAs(UnmanagedType.LPWStr)]
string lpszVolumePathNames,
uint cchBuferLength,
ref UInt32 lpcchReturnLength);
Declare Function GetVolumePathNamesForVolumeName Lib "kernel32.dll" (TODO) As TODO
'''Return Type: BOOL->int
'''param0: LPCTSTR->LPCWSTR->WCHAR*
'''param1: LPTSTR->LPWSTR->WCHAR*
'''param2: DWORD->unsigned int
'''param3: PDWORD->DWORD*
<DllImportAttribute("kernel32.dll", EntryPoint:="GetVolumePathNamesForVolumeNameW")> _
Public Shared Function GetVolumePathNamesForVolumeNameW(
<[In]()> <MarshalAs(UnmanagedType.LPTStr)>
ByVal sVolumeName As String, _
<MarshalAs(UnmanagedType.LPWStr)> _
ByVal sPathNames As System.Text.StringBuilder, _
ByVal uintBufferLen As UInteger, _
<Out()> ByRef uintReturnLen As UInteger) _
As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
None.
Do you know one? Please contribute it!
The VB Code was generated by the tool at http://clrinterop.codeplex.com/releases/view/14120. I believe this to be the same tool referenced at http://blogs.msdn.com/b/vbteam/archive/2008/03/14/making-pinvoke-easy.aspx. The StringBuilder limitation appears to apply to this code as well, and it will only return the first path/mountpoint found, but the method does work inside that limitation. I will post updated code as soon as I code and test.
Using StringBuilder for the buffer does not work since this function returns the names as a bunch of strings separated by the null character ('\0'). So StringBuilder would only report the first item. Therefore we store it in a char array, which can later be converted to a bunch of strings.
Please add some!
UInt32 dwRequired = 0;
char[] buffer = new char[260];
if (!GetVolumePathNamesForVolumeName(volumeName, buffer, (uint)buffer.Length, ref dwRequired))
{
// Not enough room in buffer perhaps? Try a bigger one
buffer = new char[dwRequired];
if (!GetVolumePathNamesForVolumeName(volumeName, buffer, (uint)buffer.Length, ref dwRequired))
throw new Win32Exception();
}
public List<string> GetMountPointsForVolume(string volumeDeviceName)
{
List<string> result = new List<string>();
// GetVolumePathNamesForVolumeName is only available on Windows XP/2003 and above
int osVersionMajor = Environment.OSVersion.Version.Major;
int osVersionMinor = Environment.OSVersion.Version.Minor;
if (osVersionMajor < 5 || (osVersionMajor == 5 && osVersionMinor < 1))
{
return result;
}
try
{
uint lpcchReturnLength = 0;
string buffer = "";
GetVolumePathNamesForVolumeNameW(volumeDeviceName, buffer, (uint)buffer.Length, ref lpcchReturnLength);
if (lpcchReturnLength == 0)
{
return result;
}
buffer = new string(new char[lpcchReturnLength]);
if (!GetVolumePathNamesForVolumeNameW(volumeDeviceName, buffer, lpcchReturnLength, ref lpcchReturnLength))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
string[] mounts = buffer.Split('\0');
foreach (string mount in mounts)
{
if (mount.Length > 0)
{
result.Add(mount);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
return result;
}