/// <summary>
/// Return the legacy drive letter (e.g. "C", "D") for the given path or null if one doesn't exist
/// </summary>
public static string GetDriveLetter(this IExtendedFileService extendedFileService, IFileService fileService, string path)
{
string pathCanonicalRoot = extendedFileService.GetCanonicalRoot(fileService, path);
// We have to walk drives
foreach (var drive in extendedFileService.GetLogicalDriveStrings())
{
string driveCanonicalRoot = extendedFileService.GetCanonicalRoot(fileService, drive);
if (String.Equals(pathCanonicalRoot, driveCanonicalRoot))
{
return(drive);
}
}
return(null);
//int rootLength;
//switch (Paths.GetPathFormat(path, out rootLength))
//{
// case PathFormat.UnknownFormat:
// case PathFormat.CurrentDirectoryRelative:
// case PathFormat.CurrentVolumeRelative:
// case PathFormat.UniformNamingConvention:
// case PathFormat.UniformNamingConventionExtended:
// return null;
// case PathFormat.DriveAbsolute:
// case PathFormat.DriveRelative:
// // Already in the "C:" form
// return path.Substring(0, 1);
// case PathFormat.Device:
// case PathFormat.VolumeAbsoluteExtended:
// // Get the DOS alias for this path
// string root = path.Substring(0, rootLength);
// string deviceAlias = fileService.QueryDosDeviceNames(root).FirstOrDefault();
// if (deviceAlias == null) return null;
// // We have to walk drives
// foreach (var drive in fileService.GetLogicalDriveStrings())
// {
// string driveAlias = fileService.QueryDosDeviceNames(drive).FirstOrDefault();
// if (String.Equals(deviceAlias, driveAlias))
// {
// return driveAlias;
// }
// }
// break;
//}
//return null;
}
/// <summary>
/// Return the legacy drive letter (e.g. "C", "D") for the given path or null if one doesn't exist
/// </summary>
public static string GetDriveLetter(this IExtendedFileService extendedFileService, IFileService fileService, string path)
{
string pathCanonicalRoot = extendedFileService.GetCanonicalRoot(fileService, path);
// We have to walk drives
foreach (var drive in extendedFileService.GetLogicalDriveStrings())
{
string driveCanonicalRoot = extendedFileService.GetCanonicalRoot(fileService, drive);
if (string.Equals(pathCanonicalRoot, driveCanonicalRoot))
{
return(drive);
}
}
return(null);
}
private string AddEntry(string directory, string canonicalRoot = null)
{
string root = Paths.GetRoot(directory);
canonicalRoot = canonicalRoot ?? extendedFileService.GetCanonicalRoot(fileService, directory);
// If the directory has vanished, walk up
while (!fileService.DirectoryExists(directory) &&
!String.Equals((directory = Paths.GetDirectory(directory)), root, StringComparison.Ordinal))
{
Debug.Assert(directory != null);
}
if (this.volumeDirectories.ContainsKey(canonicalRoot))
{
this.volumeDirectories[canonicalRoot] = directory;
}
else
{
this.volumeDirectories.Add(canonicalRoot, directory);
}
return(canonicalRoot);
}
private string AddEntry(string directory, string canonicalRoot = null)
{
string root = Paths.GetRoot(directory);
canonicalRoot = canonicalRoot ?? _extendedFileService.GetCanonicalRoot(_fileService, directory);
// Look for the highest level existing directory or use the root
while (!_fileService.DirectoryExists(directory) &&
!string.Equals((directory = Paths.GetDirectory(directory)), root, StringComparison.Ordinal))
{
Debug.Assert(directory != null);
}
if (_volumeDirectories.ContainsKey(canonicalRoot))
{
_volumeDirectories[canonicalRoot] = directory;
}
else
{
_volumeDirectories.Add(canonicalRoot, directory);
}
return(canonicalRoot);
}