/// <summary>
/// </summary>
protected void ReadHeader()
{
_header = new DbaseFileHeader();
// read the header
_header.ReadHeader(_dbfStream,
_parent._streamProvider is FileStreamProvider
? ((FileStreamProvider)_parent._streamProvider).Path
: null);
// how many records remain
_readPosition = _header.HeaderLength;
}
/// <summary>
/// Gets the header information for the dbase file.
/// </summary>
/// <returns>DbaseFileHeader contain header and field information.</returns>
public DbaseFileHeader GetHeader()
{
if (_header == null)
{
using (var stream = _streamProvider.OpenRead())
using (var dbfStream = new BinaryReader(stream))
{
_header = new DbaseFileHeader();
// read the header
_header.ReadHeader(dbfStream, _streamProvider is FileStreamProvider ? ((FileStreamProvider)_streamProvider).Path : null);
}
}
return(_header);
}
/// <summary>
/// Method to write <paramref name="header"/> to the dbase stream
/// </summary>
/// <param name="header">The header to write</param>
public void Write(DbaseFileHeader header)
{
//if (header == null)
// throw new ArgumentNullException("header");
////if (_recordsWritten)
//// throw new InvalidOperationException("Records have already been written. Header file needs to be written first.");
//_headerWritten = true;
//if (header.Encoding.WindowsCodePage != _encoding.WindowsCodePage)
//{
// header.Encoding = _encoding;
//}
//header.WriteHeader(_writer);
//_header = header;
if (header == null)
{
throw new ArgumentNullException("header");
}
//if (_recordsWritten)
// throw new InvalidOperationException("Records have already been written. Header file needs to be written first.");
_headerWritten = true;
if (header.Encoding.WindowsCodePage != _encoding.WindowsCodePage)
{
header.Encoding = _encoding;
}
// Get the current position
var currentPosition = (int)_writer.BaseStream.Position;
//Header should always be written first in the file
if (_writer.BaseStream.Position != 0)
{
_writer.Seek(0, SeekOrigin.Begin);
}
// actually write the header
header.WriteHeader(_writer);
// reposition the stream
if (currentPosition != 0)
{
_writer.Seek(currentPosition, SeekOrigin.Begin);
}
_header = header;
}
