private DataTable readWholeWorkSheet(XlsWorksheet sheet)
{
XlsBiffIndex idx;
if (!readWorkSheetGlobals(sheet, out idx, out m_currentRowRecord))
{
return(null);
}
DataTable table = new DataTable(sheet.Name);
bool triggerCreateColumns = true;
if (idx != null)
{
readWholeWorkSheetWithIndex(idx, triggerCreateColumns, table);
}
else
{
readWholeWorkSheetNoIndex(triggerCreateColumns, table);
}
table.EndLoadData();
return(table);
}
private bool readWorkSheetGlobals(XlsWorksheet sheet, out XlsBiffIndex idx, out XlsBiffRow row)
{
idx = null;
row = null;
m_stream.Seek((int)sheet.DataOffset, SeekOrigin.Begin);
XlsBiffBOF bof = m_stream.Read() as XlsBiffBOF;
if (bof == null || bof.Type != BIFFTYPE.Worksheet)
{
return(false);
}
//DumpBiffRecords();
XlsBiffRecord rec = m_stream.Read();
if (rec == null)
{
return(false);
}
if (rec is XlsBiffIndex)
{
idx = rec as XlsBiffIndex;
}
else if (rec is XlsBiffUncalced)
{
// Sometimes this come before the index...
idx = m_stream.Read() as XlsBiffIndex;
}
#region Если в текущем файле MS Biff нет индекса или он не находится в самом начале то основные данные в таблицах не находятся и выводится только минимум.
//if (null == idx)
//{
// // There is a record before the index! Chech his type and see the MS Biff Documentation
// return false;
//}
#endregion
if (idx != null)
{
idx.IsV8 = isV8();
}
XlsBiffRecord trec;
XlsBiffDimensions dims = null;
do
{
trec = m_stream.Read();
if (trec.ID == BIFFRECORDTYPE.DIMENSIONS)
{
dims = (XlsBiffDimensions)trec;
break;
}
} while (trec != null && trec.ID != BIFFRECORDTYPE.ROW);
//if we are already on row record then set that as the row, otherwise step forward till we get to a row record
if (trec.ID == BIFFRECORDTYPE.ROW)
{
row = (XlsBiffRow)trec;
}
XlsBiffRow rowRecord = null;
while (rowRecord == null)
{
if (m_stream.Position >= m_stream.Size)
{
break;
}
var thisRec = m_stream.Read();
if (thisRec is XlsBiffEOF)
{
break;
}
rowRecord = thisRec as XlsBiffRow;
}
row = rowRecord;
m_maxCol = 256;
if (dims != null)
{
dims.IsV8 = isV8();
m_maxCol = dims.LastColumn - 1;
sheet.Dimensions = dims;
}
m_maxRow = idx == null ? (int)dims.LastRow : (int)idx.LastExistingRow;
if (idx != null && idx.LastExistingRow <= idx.FirstExistingRow)
{
return(false);
}
else if (row == null)
{
return(false);
}
m_depth = 0;
return(true);
}