private void updateFileHeaderInfo()
{
byte[] data = new byte[8];
//save the "allRecordsLength" value
BitConverterEx.SetBytes(_allRecordsLength, data, 0);
_fileStream.Seek(20, SeekOrigin.Begin);
_fileStream.Write(data, 0, 8);
_fileStream.Flush();
}
private void combineRecordHeader(byte[] header,
int dataAreaLength, int contentLength, long nextRecordStartPosition)
{
//record header mark
for (int idx = 0; idx < 4; idx++)
{
header[idx] = 0xff;
}
BitConverterEx.SetBytes(dataAreaLength, header, 4);
BitConverterEx.SetBytes(contentLength, header, 8);
BitConverterEx.SetBytes(nextRecordStartPosition, header, 12);
}
/// <summary>
/// Rebuild binary data file
/// </summary>
private static void RebuildDataFile(string dataFile)
{
FileStream stream = new FileStream(
dataFile, FileMode.Create, FileAccess.Write);
//the file header total length is 512 byte
byte[] header = new byte[512];
string headerName = "KWY/TCD";
int headerVersion = 10;
long headerAllRecordsLength = header.Length;
BitConverterEx.SetBytes(headerName, header, 0, 16, Encoding.ASCII); //header segment: Name offset=0
BitConverterEx.SetBytes(headerVersion, header, 16); //header segment: Version offset=16
BitConverterEx.SetBytes(headerAllRecordsLength, header, 20); //header segment: AllRecordsLength offset=20
stream.Write(header, 0, header.Length);
stream.Close();
}
