private static void ReadNString(TextWithPos sr, char Delim, StringBuilder s, ref int ch)
{
s.Length = 0;
s.Append((char)ch);
while (ch >= 0)
{
ch = sr.GetNextChar();
if ((ch == Delim) || (ch == 13) || (ch == 10) || (ch < 0))
{
return;
}
s.Append((char)ch);
} //while
}
private static void ReadQString(TextWithPos sr, StringBuilder s, ref int ch)
{
bool InQuote = false;
s.Length = 0;
while (ch >= 0)
{
ch = sr.GetNextChar();
if (ch < 0)
{
return;
}
if ((ch != '"') && InQuote)
{
return;
}
if (InQuote || (ch != '"'))
{
s.Append((char)ch);
}
InQuote = (ch == '"') && !InQuote;
}
}
internal static void Read(TextReader InString, ExcelFile Workbook, char Delim, int FirstRow, int FirstCol,
ColumnImportType[] ColumnFormats, string[] DateFormats)
{
if (Workbook.VirtualMode)
{
Workbook.OnVirtualCellStartReading(Workbook, new VirtualCellStartReadingEventArgs(Workbook));
}
int r = FirstRow;
int c = FirstCol;
TextWithPos sr = new TextWithPos(InString);
StringBuilder s = new StringBuilder();
{
int ch = sr.GetNextChar();
while (ch >= 0)
{
if (ch == '"')
{
ReadQString(sr, s, ref ch);
}
else if (ch == Delim)
{
c++;
ch = sr.GetNextChar();
continue;
}
else if (ch == 10) //there are 3 types of EOL: Win (13 10) Mac (10) and Ms.Dos(13)
{
c = FirstCol;
r++;
ch = sr.GetNextChar();
continue;
}
else if (ch == 13)
{
c = FirstCol;
r++;
ch = sr.GetNextChar();
if (ch == 10)
{
ch = sr.GetNextChar();
}
continue;
}
else
{
ReadNString(sr, Delim, s, ref ch);
}
if ((ColumnFormats != null) && (c - FirstCol < ColumnFormats.Length))
{
switch (ColumnFormats[c - FirstCol])
{
case ColumnImportType.Text: SetCellValue(Workbook, r, c, s.ToString()); break;
case ColumnImportType.Skip: break;
default: SetCellFromString(Workbook, r, c, s.ToString(), DateFormats); break;
} //case
}
else
{
SetCellFromString(Workbook, r, c, s.ToString(), DateFormats);
}
}
}
}