internal CsvRow(int rowNumber, string line, CsvCellRange[] ranges, Dictionary <string, int> headerLookup, CsvReaderSettings settings)
{
_lookup = headerLookup;
_line = line;
_ranges = ranges;
this.Length = ranges.Length;
this.RowNumber = rowNumber;
_settings = settings;
}
/// <summary>
/// Initializes a new CsvReader instance
/// </summary>
/// <param name="input">Input stream containing the csv file</param>
/// <param name="config"></param>
public CsvReader(Stream input, CsvReaderSettings readerConfig = null)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (input.CanSeek)
{
_streamInitialPosition = input.Position;
}
if (readerConfig == null)
{
_config = new CsvReaderSettings();
}
else
{
_config = readerConfig;
}
_reader = new StreamReader(input, Encoding.UTF8, true, _config.ReadBufferSize, !_config.DisposeStream);
_columnNameLookup = new Dictionary <string, int>(_config.ColumnNameComparer);
_firstRow = this.ReadRows(attemptToYieldFromCache: false).FirstOrDefault();
// Assume that the first row is the expected number of columns unless specified.
if (_firstRow == null)
{
throw new CsvReaderException("Failed to read first row from csv file.");
}
_columnCount = _firstRow.Length;
string[] columnNames = null;
// If we expect headers, set the column names to the values of the first row.
// Otherwise generate column names col1,col2,...
if (_config.HasHeaders)
{
if (_config.TrimColumnNames)
{
columnNames = _firstRow.StringColumns.Select(c => c.Trim()).ToArray();
}
else
{
columnNames = _firstRow.StringColumns.ToArray();
}
}
else
{
int startAt = _config.IncludeRowNumberAsColumn ? 0 : 1;
columnNames = Enumerable.Range(startAt, _columnCount).Select(i => "col" + i).ToArray();
}
if (columnNames == null || columnNames.Length == 0)
{
throw new CsvReaderException("Unable to detect any cells");
}
if (_config.IncludeRowNumberAsColumn)
{
columnNames[0] = _config.RowNumberColumnName;
}
this.ColumnNames = columnNames;
}
public CsvReader(string inputFilePath, CsvReaderSettings config = null) :
this(new FileStream(inputFilePath, FileMode.Open), config)
{
}