/// <summary>
/// Default constructor
/// </summary>
/// <param name="file">Stream with source data</param>
public ExcelDataReader(Stream file)
{
m_file = file; // new BufferedStream(file);
m_hdr = XlsHeader.ReadHeader(m_file);
XlsRootDirectory dir = new XlsRootDirectory(m_hdr);
XlsDirectoryEntry workbookEntry = dir.FindEntry("Workbook");
if (workbookEntry == null)
workbookEntry = dir.FindEntry("Book");
if (workbookEntry == null)
throw new FileNotFoundException("Oops! Neither stream 'Workbook' nor 'Book' was found in file");
if (workbookEntry.EntryType != STGTY.STGTY_STREAM)
throw new FormatException("Oops! Workbook directory entry is not a Stream");
m_stream = new XlsBiffStream(m_hdr, workbookEntry.StreamFirstSector);
ReadWorkbookGlobals();
GC.Collect();
m_workbookData = new DataSet();
for (int i = 0; i < m_sheets.Count; i++)
if (ReadWorksheet(m_sheets[i]))
m_workbookData.Tables.Add(m_sheets[i].Data);
m_globals.SST = null;
m_globals = null;
m_sheets = null;
m_stream = null;
m_hdr = null;
GC.Collect();
}
/// <summary>
/// Private method, reads Workbook Globals section
/// </summary>
private void ReadWorkbookGlobals()
{
m_globals = new XlsWorkbookGlobals();
m_stream.Seek(0, SeekOrigin.Begin);
XlsBiffRecord rec = m_stream.Read();
XlsBiffBOF bof = rec as XlsBiffBOF;
if (bof == null || bof.Type != BIFFTYPE.WorkbookGlobals)
throw new InvalidDataException("Oops! Stream has invalid data");
m_version = bof.Version;
m_encoding = Encoding.Unicode;
bool isV8 = (m_version >= 0x600);
bool sst = false;
while ((rec = m_stream.Read()) != null)
{
switch (rec.ID)
{
case BIFFRECORDTYPE.INTERFACEHDR:
m_globals.InterfaceHdr = (XlsBiffInterfaceHdr)rec;
break;
case BIFFRECORDTYPE.BOUNDSHEET:
XlsBiffBoundSheet sheet = (XlsBiffBoundSheet)rec;
if (sheet.Type != XlsBiffBoundSheet.SheetType.Worksheet) break;
sheet.IsV8 = isV8;
sheet.UseEncoding = m_encoding;
m_sheets.Add(new XlsWorksheet(m_globals.Sheets.Count, sheet));
m_globals.Sheets.Add(sheet);
break;
case BIFFRECORDTYPE.MMS:
m_globals.MMS = rec;
break;
case BIFFRECORDTYPE.COUNTRY:
m_globals.Country = rec;
break;
case BIFFRECORDTYPE.CODEPAGE:
m_globals.CodePage = (XlsBiffSimpleValueRecord)rec;
m_encoding = Encoding.GetEncoding(m_globals.CodePage.Value);
break;
case BIFFRECORDTYPE.FONT:
case BIFFRECORDTYPE.FONT_V34:
m_globals.Fonts.Add(rec);
break;
case BIFFRECORDTYPE.FORMAT:
case BIFFRECORDTYPE.FORMAT_V23:
m_globals.Formats.Add(rec);
break;
case BIFFRECORDTYPE.XF:
case BIFFRECORDTYPE.XF_V4:
case BIFFRECORDTYPE.XF_V3:
case BIFFRECORDTYPE.XF_V2:
m_globals.ExtendedFormats.Add(rec);
break;
case BIFFRECORDTYPE.SST:
m_globals.SST = (XlsBiffSST)rec;
sst = true;
break;
case BIFFRECORDTYPE.CONTINUE:
if (!sst) break;
XlsBiffContinue contSST = (XlsBiffContinue)rec;
m_globals.SST.Append(contSST);
break;
case BIFFRECORDTYPE.EXTSST:
m_globals.ExtSST = rec;
sst = false;
break;
case BIFFRECORDTYPE.EOF:
if (m_globals.SST != null)
m_globals.SST.ReadStrings();
return;
default:
continue;
}
}
}