public static bool GetFileInformationByHandleEx(
SafeFileHandle hFile,
out FILE_BASIC_INFO info
)
{
info = new FILE_BASIC_INFO();
return(GetFileInformationByHandleEx(hFile, FILE_INFO_BY_HANDLE_CLASS.FileBasicInfo, out info, (uint)Marshal.SizeOf(info)));
}
public static DateTime GetFileChangeTime(string path)
{
using (var file = new FileStream(path, FileMode.Open)) {
var fileInfo = new FILE_BASIC_INFO();
#pragma warning disable 618
GetFileInformationByHandleEx(file.Handle, 0, out fileInfo, (uint)Marshal.SizeOf(fileInfo));
#pragma warning restore 618
return(DateTime.FromFileTime(fileInfo.ChangeTime));
}
}
public void SetBasicInfo(
UInt32 FileAttributes,
UInt64 CreationTime,
UInt64 LastAccessTime,
UInt64 LastWriteTime)
{
if (0 == FileAttributes)
{
FileAttributes = (UInt32)System.IO.FileAttributes.Normal;
}
if (null != Stream)
{
FILE_BASIC_INFO Info = default(FILE_BASIC_INFO);
if (unchecked ((UInt32)(-1)) != FileAttributes)
{
Info.FileAttributes = FileAttributes;
}
if (0 != CreationTime)
{
Info.CreationTime = CreationTime;
}
if (0 != LastAccessTime)
{
Info.LastAccessTime = LastAccessTime;
}
if (0 != LastWriteTime)
{
Info.LastWriteTime = LastWriteTime;
}
if (!SetFileInformationByHandle(Stream.SafeFileHandle.DangerousGetHandle(),
0 /*FileBasicInfo*/, ref Info, (UInt32)Marshal.SizeOf(Info)))
{
ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
}
}
else
{
if (unchecked ((UInt32)(-1)) != FileAttributes)
{
DirInfo.Attributes = (System.IO.FileAttributes)FileAttributes;
}
if (0 != CreationTime)
{
DirInfo.CreationTimeUtc = DateTime.FromFileTimeUtc((Int64)CreationTime);
}
if (0 != LastAccessTime)
{
DirInfo.LastAccessTimeUtc = DateTime.FromFileTimeUtc((Int64)LastAccessTime);
}
if (0 != LastWriteTime)
{
DirInfo.LastWriteTimeUtc = DateTime.FromFileTimeUtc((Int64)LastWriteTime);
}
}
}
public static bool SetFileInformationByHandle(SafeFileHandle hFile, FILE_BASIC_INFO fileInformation)
{
var fih = new FileInformation {
FILE_BASIC_INFO = fileInformation
};
return(SetFileInformationByHandle(
hFile,
FILE_INFO_BY_HANDLE_CLASS.FileBasicInfo,
ref fih,
Marshal.SizeOf(fileInformation)));
}
// Default values indicate "no change". Use defaults so that we don't force callsites to be aware of the default values
internal unsafe static bool SetFileTime(
SafeFileHandle hFile,
long creationTime = -1,
long lastAccessTime = -1,
long lastWriteTime = -1,
long changeTime = -1,
uint fileAttributes = 0)
{
FILE_BASIC_INFO basicInfo = new FILE_BASIC_INFO()
{
CreationTime = creationTime,
LastAccessTime = lastAccessTime,
LastWriteTime = lastWriteTime,
ChangeTime = changeTime,
FileAttributes = fileAttributes
};
return(SetFileInformationByHandle(hFile, FILE_INFO_BY_HANDLE_CLASS.FileBasicInfo, ref basicInfo, (uint)Marshal.SizeOf <FILE_BASIC_INFO>()));
}
// Default values indicate "no change". Use defaults so that we don't force callsites to be aware of the default values
internal unsafe static bool SetFileTime(
SafeFileHandle hFile,
long creationTime = -1,
long lastAccessTime = -1,
long lastWriteTime = -1,
long changeTime = -1,
uint fileAttributes = 0)
{
FILE_BASIC_INFO basicInfo = new FILE_BASIC_INFO()
{
CreationTime = creationTime,
LastAccessTime = lastAccessTime,
LastWriteTime = lastWriteTime,
ChangeTime = changeTime,
FileAttributes = fileAttributes
};
return SetFileInformationByHandle(hFile, FILE_INFO_BY_HANDLE_CLASS.FileBasicInfo, ref basicInfo, (uint)Marshal.SizeOf<FILE_BASIC_INFO>());
}
public static void SetFileInformationToFileStream(
FileStream stream,
FileAttributes fileAttributes,
DateTime?creationTime,
DateTime?lastAccessTime,
DateTime?lastWriteTime)
{
if (0 == fileAttributes)
{
fileAttributes = System.IO.FileAttributes.Normal;
}
FILE_BASIC_INFO info = default(FILE_BASIC_INFO);
if (unchecked ((UInt32)(-1)) != (UInt32)fileAttributes)
{
info.FileAttributes = (UInt32)fileAttributes;
}
if (creationTime.HasValue)
{
info.CreationTime = (ulong)creationTime.Value.ToFileTimeUtc();
}
if (lastAccessTime.HasValue)
{
info.LastAccessTime = (ulong)lastAccessTime.Value.ToFileTimeUtc();
}
if (lastWriteTime.HasValue)
{
info.LastWriteTime = (ulong)lastWriteTime.Value.ToFileTimeUtc();
}
if (!SetFileInformationByHandle(stream.SafeFileHandle.DangerousGetHandle(),
0 /*FileBasicInfo*/, ref info, (UInt32)Marshal.SizeOf(info)))
{
throw Marshal.GetExceptionForHR(Marshal.GetLastWin32Error());
}
}
public static void SetBasicInfoToFileStream(
FileStream stream,
UInt32 fileAttributes,
UInt64 creationTime,
UInt64 lastAccessTime,
UInt64 lastWriteTime)
{
if (0 == fileAttributes)
{
fileAttributes = (UInt32)System.IO.FileAttributes.Normal;
}
FILE_BASIC_INFO Info = default(FILE_BASIC_INFO);
if (unchecked ((UInt32)(-1)) != fileAttributes)
{
Info.FileAttributes = fileAttributes;
}
if (0 != creationTime)
{
Info.CreationTime = creationTime;
}
if (0 != lastAccessTime)
{
Info.LastAccessTime = lastAccessTime;
}
if (0 != lastWriteTime)
{
Info.LastWriteTime = lastWriteTime;
}
if (!SetFileInformationByHandle(stream.SafeFileHandle.DangerousGetHandle(),
0 /*FileBasicInfo*/, ref Info, (UInt32)Marshal.SizeOf(Info)))
{
Utils.ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
}
}
internal static extern bool SetFileInformationByHandle(SafeFileHandle hFile, FILE_INFO_BY_HANDLE_CLASS FileInformationClass, ref FILE_BASIC_INFO lpFileInformation, uint dwBufferSize);
internal static extern bool SetFileInformationByHandle(SafeFileHandle hFile, FILE_INFO_BY_HANDLE_CLASS FileInformationClass, ref FILE_BASIC_INFO lpFileInformation, uint dwBufferSize);
private static extern Boolean SetFileInformationByHandle(
IntPtr hFile,
Int32 FileInformationClass,
ref FILE_BASIC_INFO lpFileInformation,
UInt32 dwBufferSize);
static extern bool GetFileInformationByHandleEx(IntPtr hFile, int infoClass, out FILE_BASIC_INFO fileInfo, uint dwBufferSize);
public static extern bool GetFileInformationByHandleEx(
SafeFileHandle hFile,
FILE_INFO_BY_HANDLE_CLASS infoClass,
out FILE_BASIC_INFO dirInfo,
uint dwBufferSize);
