public virtual void Refresh()
{
try
{
switch (this.source)
{
case Source.Attributes:
System.IO.FileAttributes attributes = NativeMethods.FileManagement.GetFileAttributes(this.Path);
this.PopulateData(this.Path, attributes);
break;
case Source.FindResult:
var findResult = NativeMethods.FileManagement.FindFirstFile(this.Path);
this.PopulateData(findResult);
findResult.FindHandle.Close();
break;
case Source.FileInfo:
using (SafeFileHandle fileHandle = GetFileHandle(this.Path))
{
NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info = NativeMethods.FileManagement.GetFileInformationByHandle(fileHandle);
this.PopulateData(this.Path, fileHandle, info);
}
break;
}
}
catch (System.IO.FileNotFoundException)
{
this.Exists = false;
}
}
internal static IFileSystemInformation Create(string path, IFileService fileService)
{
using (SafeFileHandle fileHandle = GetFileHandle(path))
{
string canonicalPath = NativeMethods.FileManagement.GetFinalPathName(fileHandle, 0);
// GetFinalPathNameByHandle will use the legacy drive for the volume (e.g. \\?\C:\). We may have started with C:\ or some other
// volume name format (\\?\Volume({GUID}), etc.) and we want to put the original volume specifier back.
canonicalPath = Paths.ReplaceRoot(path, canonicalPath);
NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info = NativeMethods.FileManagement.GetFileInformationByHandle(fileHandle);
return(Create(canonicalPath, fileHandle, info, fileService));
}
}
protected override void PopulateData(string originalPath, SafeFileHandle fileHandle, NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info)
{
base.PopulateData(originalPath, fileHandle, info);
this.Length = NativeMethods.HighLowToLong(info.nFileSizeHigh, info.nFileSizeLow);
this.directory = Paths.GetDirectory(this.Path);
}
new internal static IFileSystemInformation Create(string originalPath, SafeFileHandle fileHandle, NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info, IFileService fileService)
{
if ((info.dwFileAttributes & System.IO.FileAttributes.Directory) != 0)
{
throw new ArgumentOutOfRangeException(nameof(info));
}
var fileInfo = new FileInformation(fileService);
fileInfo.PopulateData(originalPath, fileHandle, info);
return(fileInfo);
}
protected virtual void PopulateData(string originalPath, SafeFileHandle fileHandle, NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info)
{
this.source = Source.FileInfo;
string originalRoot = Paths.GetRoot(originalPath);
string finalPath = NativeMethods.FileManagement.GetFinalPathName(fileHandle, NativeMethods.FileManagement.FinalPathFlags.FILE_NAME_NORMALIZED);
finalPath = Paths.ReplaceRoot(originalPath, finalPath);
this.source = Source.FindResult;
this.Path = finalPath;
this.Attributes = info.dwFileAttributes;
this.CreationTime = NativeMethods.GetDateTime(info.ftCreationTime);
this.LastAccessTime = NativeMethods.GetDateTime(info.ftLastAccessTime);
this.LastWriteTime = NativeMethods.GetDateTime(info.ftLastWriteTime);
this.Name = Paths.GetFileOrDirectoryName(finalPath) ?? finalPath;
this.FileIndex = NativeMethods.HighLowToLong(info.nFileIndexHigh, info.nFileSizeLow);
this.NumberOfLinks = info.nNumberOfLinks;
this.VolumeSerialNumber = info.dwVolumeSerialNumber;
this.Exists = true;
}
internal static IFileSystemInformation Create(string originalPath, SafeFileHandle fileHandle, NativeMethods.FileManagement.BY_HANDLE_FILE_INFORMATION info, IFileService fileService)
{
if ((info.dwFileAttributes & System.IO.FileAttributes.Directory) != 0)
{
return(DirectoryInformation.Create(originalPath, fileHandle, info, fileService));
}
else
{
return(FileInformation.Create(originalPath, fileHandle, info, fileService));
}
}
