private static DateTime GetUpdateTime(SafeFileHandle handle)
{
NativeMethods.FILE_BASIC_INFORMATION fileInfo =
new NativeMethods.FILE_BASIC_INFORMATION();
IntPtr fileInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(fileInfo));
try
{
NativeMethods.IO_STATUS_BLOCK status;
uint result = NativeMethods.NtQueryInformationFile(handle,
out status, fileInfoPtr, (uint)Marshal.SizeOf(fileInfo),
NativeMethods.FILE_INFORMATION_CLASS.FileBasicInformation);
if (result != 0)
{
throw new IOException();
}
fileInfo = (NativeMethods.FILE_BASIC_INFORMATION)
Marshal.PtrToStructure(fileInfoPtr, fileInfo.GetType());
return(DateTime.FromFileTime(fileInfo.ChangeTime));
}
finally
{
Marshal.FreeHGlobal(fileInfoPtr);
}
}
internal static void SetTimes(SafeFileHandle handle, DateTime updateTime,
DateTime createdTime, DateTime lastModifiedTime, DateTime lastAccessedTime)
{
NativeMethods.FILE_BASIC_INFORMATION fileInfo =
new NativeMethods.FILE_BASIC_INFORMATION()
{
ChangeTime = updateTime.ToFileTime(),
CreationTime = createdTime.ToFileTime(),
LastAccessTime = lastAccessedTime.ToFileTime(),
LastWriteTime = lastModifiedTime.ToFileTime()
};
if (fileInfo.ChangeTime == 0)
{
throw new ArgumentOutOfRangeException("updateTime");
}
if (fileInfo.CreationTime == 0)
{
throw new ArgumentOutOfRangeException("createdTime");
}
if (fileInfo.LastAccessTime == 0)
{
throw new ArgumentOutOfRangeException("lastAccessedTime");
}
if (fileInfo.LastWriteTime == 0)
{
throw new ArgumentOutOfRangeException("lastModifiedTime");
}
IntPtr fileInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(fileInfo));
try
{
Marshal.StructureToPtr(fileInfo, fileInfoPtr, true);
NativeMethods.IO_STATUS_BLOCK status;
uint result = NativeMethods.NtSetInformationFile(handle,
out status, fileInfoPtr, (uint)Marshal.SizeOf(fileInfo),
NativeMethods.FILE_INFORMATION_CLASS.FileBasicInformation);
if (result != 0)
{
throw new IOException();
}
}
finally
{
Marshal.FreeHGlobal(fileInfoPtr);
}
}
