/// <summary>
/// This method returns a readable data stream.
/// </summary>
/// <returns></returns>
protected virtual Stream DataStreamRead()
{
Stream outStream;
outStream = new FileStream(BinaryDataFileName, FileMode.Open, FileAccess.Read, FileShare.Read);
if (Encrypted)
outStream = new CryptoStream(outStream, RijndaelAlg.CreateDecryptor(), CryptoStreamMode.Read);
if (Compressed)
outStream = new GZipStream(outStream, CompressionMode.Decompress);
outStream = new StreamCounter(outStream, StreamCounter.CounterDirection.Read, Length);
return outStream;
}
/// <summary>
/// This method returns a writeable data stream.
/// </summary>
/// <returns></returns>
protected virtual Stream DataStreamWrite()
{
Stream outStream = null; ;
RijndaelAlg = new RijndaelManaged();
try
{
mFileStream = new FileStream(BinaryDataFileName, FileMode.CreateNew, FileAccess.Write, FileShare.None);
outStream = mFileStream;
if (Encrypted)
{
mEncrStream = new CryptoStream(outStream, RijndaelAlg.CreateEncryptor(), CryptoStreamMode.Write);
outStream = mEncrStream;
}
if (Compressed)
{
mCompStream = new GZipStream(outStream, CompressionMode.Compress);
outStream = mCompStream;
}
outStream = new StreamCounter(outStream);
}
catch (Exception ex)
{
//Just make sure that we don't leave anything open in case there is an error.
if (outStream != null)
outStream.Close();
mFileStream = null;
mEncrStream = null;
mCompStream = null;
}
return outStream;
}
