private void WriteData <T>(
IEnumerable <T> values,
string fileName,
TextWriter stream,
CsvFileDescription fileDescription)
{
FieldMapper <T> fm = new FieldMapper <T>(fileDescription, fileName, true);
CsvStream cs = new CsvStream(null, stream, fileDescription.SeparatorChar);
List <string> row = new List <string>();
if (fileDescription.FirstLineHasColumnNames)
{
fm.WriteNames(ref row);
cs.WriteRow(row, fileDescription.QuoteAllFields);
}
// -----
foreach (T obj in values)
{
// Convert obj to row
fm.WriteObject(obj, ref row);
cs.WriteRow(row, fileDescription.QuoteAllFields);
}
}
private IEnumerable <T> ReadData <T>(
string fileName,
StreamReader stream,
CsvFileDescription fileDescription) where T : class, ICsvRow, new()
{
bool readingRawDataRows = typeof(IDataRow).IsAssignableFrom(typeof(T));
FieldMapper_Reading <T> fm = null;
if (!readingRawDataRows)
{
fm = new FieldMapper_Reading <T>(fileDescription, fileName, false);
}
bool readingFile = !string.IsNullOrEmpty(fileName);
if (readingFile)
{
stream = new StreamReader(new FileStream(fileName, FileMode.Open, FileAccess.Read));
}
else
{
if ((stream == null) || (!stream.BaseStream.CanSeek))
{
throw new BadStreamException();
}
stream.BaseStream.Seek(0, SeekOrigin.Begin);
}
CsvStream cs = new CsvStream(stream, null, fileDescription.SeparatorChar);
IDataRow row = null;
if (readingRawDataRows)
{
row = new T() as IDataRow;
}
else
{
row = new DataRow();
}
AggregatedException ae =
new AggregatedException(typeof(T).ToString(), fileName, fileDescription.MaximumNbrExceptions);
try
{
bool firstRow = true;
while (cs.ReadRow(ref row))
{
if ((row.Count == 1) &&
((row[0].Value == null) ||
(string.IsNullOrEmpty(row[0].Value.Trim()))))
{
continue;
}
if (firstRow && fileDescription.FirstLineHasColumnNames)
{
if (!readingRawDataRows)
{
fm.ReadNames(row);
}
}
else
{
T obj = default(T);
try
{
if (readingRawDataRows)
{
obj = row as T;
}
else
{
obj = fm.ReadObject(row, ae);
}
}
catch (AggregatedException ae2)
{
throw ae2;
}
catch (Exception e)
{
ae.AddException(e);
}
yield return(obj);
}
firstRow = false;
}
}
finally
{
if (readingFile)
{
stream.Dispose();
}
ae.ThrowIfExceptionsStored();
}
}