public static (long contentId, DateTime lastWriteTime) ReadMetadata(string filePath)
{
var stream = AlternativeDataStream.TryOpen(
filePath,
MetadataStreamName,
FileAccess.Read,
FileShare.Read | FileShare.Write | FileShare.Delete);
if (stream == null)
{
return(long.MinValue, DateTime.MinValue);
}
var bytes = new byte[sizeof(long) * 2];
using (stream)
{
if (stream.Read(bytes, 0, bytes.Length) <= 0)
{
return(long.MinValue, DateTime.MinValue);
}
long contentId = BitConverter.ToInt64(bytes, 0);
long timeInBinary = BitConverter.ToInt64(bytes, sizeof(long));
var lastWriteTime = DateTime.FromBinary(timeInBinary);
return(contentId, lastWriteTime);
}
}
public static void WriteMetadata(string filePath, long contentId, DateTime lastWriteTime)
{
var stream = AlternativeDataStream.TryOpen(
filePath,
MetadataStreamName,
FileAccess.Write,
FileShare.Read | FileShare.Write | FileShare.Delete);
if (stream == null)
{
return;
}
var bytes = new byte[sizeof(long) * 2];
long timeBinary = lastWriteTime.ToBinary();
Array.Copy(BitConverter.GetBytes(contentId), 0, bytes, 0, sizeof(long));
Array.Copy(BitConverter.GetBytes(timeBinary), 0, bytes, sizeof(long), sizeof(long));
using (stream)
stream.Write(bytes, 0, bytes.Length);
}
