static void Main(string[] args)
{
try
{
const string Path = @"E:\123.txt";
const string StreamName = "stream1";
//FileInfo file = new FileInfo(Path);
//if (!file.Exists)
//if (!file.AlternateDataStreamExists(StreamName))
//{
//}
if (!File.Exists(Path))
{
throw new FileNotFoundException(null, Path);
}
if (!FileSystem.AlternateDataStreamExists(Path, StreamName))
{
Console.WriteLine("Stream not found; creating it...");
AlternateDataStreamInfo data = FileSystem.GetAlternateDataStream(Path, StreamName);
FileStream fsWriter = data.OpenWrite();
fsWriter.WriteByte(65);
fsWriter.Close();
}
else
{
AlternateDataStreamInfo data = FileSystem.GetAlternateDataStream(Path, StreamName);
FileStream fsWriter = data.OpenWrite();
fsWriter.WriteByte(97);
fsWriter.Close();
}
AlternateDataStreamInfo data1 = FileSystem.GetAlternateDataStream(Path, StreamName);
FileStream fsReader1 = data1.OpenRead();
byte[] buffer = new byte[100];
fsReader1.Read(buffer, 0, Convert.ToInt32(fsReader1.Length));
FileStream fsWriter1 = data1.OpenWrite();
fsWriter1.WriteByte(49);
fsWriter1.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
Console.ReadKey();
}
public static MD5StreamStatus TestMD5Stream(FileInfo fileInfo)
{
byte[] fileHash = GetFileHash(fileInfo.FullName);
AlternateDataStreamInfo md5StreamInfo = FileSystem.GetAlternateDataStream(fileInfo, MD5StreamName);
if (md5StreamInfo.Exists)
{
Stream md5Stream = md5StreamInfo.OpenRead();
MD5Descriptor descriptor = MD5Descriptor.ReadFromStream(md5Stream);
if (descriptor == null)
{
return(MD5StreamStatus.Invalid);
}
if (DateTime.Equals(fileInfo.LastWriteTimeUtc, descriptor.FileWriteTimeUtc))
{
if (ByteUtils.AreByteArraysEqual(fileHash, descriptor.FileHash))
{
return(MD5StreamStatus.Correct);
}
else
{
return(MD5StreamStatus.Incorrect);
}
}
else // file was updated since MD5 was stored
{
SaveMD5Stream(md5StreamInfo, fileHash, fileInfo.LastWriteTimeUtc);
// We revert to the last write time before the ADS was written
File.SetLastWriteTimeUtc(fileInfo.FullName, fileInfo.LastWriteTimeUtc);
return(MD5StreamStatus.Updated);
}
}
else
{
SaveMD5Stream(md5StreamInfo, fileHash, fileInfo.LastWriteTimeUtc);
// We revert to the last write time before the ADS was written
File.SetLastWriteTimeUtc(fileInfo.FullName, fileInfo.LastWriteTimeUtc);
return(MD5StreamStatus.Created);
}
}
private static Guid _GetID(string uri)
{
const string TID = "lguid";
if (File.Exists(uri) || Directory.Exists(uri))
{
if (FileSystem.AlternateDataStreamExists(uri, TID))
{
Logger.D("{0} begin reader", uri);
AlternateDataStreamInfo adfs = FileSystem.GetAlternateDataStream(uri, TID);
FileStream fs = adfs.OpenRead();
StreamReader sr = new StreamReader(fs);
string guid = sr.ReadToEnd();
Logger.D("{0} begin close", uri);
sr.Close();
fs.Close();
sr.Dispose();
fs.Dispose();
Logger.D("{0} close reader", uri);
return(Guid.Parse(guid));
}
else
{
Guid id = Guid.NewGuid();
AlternateDataStreamInfo adfs = FileSystem.GetAlternateDataStream(uri, TID);
FileStream fs = adfs.OpenWrite();
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(id.ToString());
sw.Close();
fs.Close();
sw.Dispose();
fs.Dispose();
return(id);
}
}
else
{
return(Guid.NewGuid());
}
}