private IEnumerable <ICsvRow> where_clause <T>(string name, T value, Func <string, T, bool> match)
{
int columnIndex = CsvHelpers.NameToColumnIndex(_columns, name);
foreach (var line in File.ReadLines(_path))
{
if (IsNullOrWhiteSpace(line))
{
continue;
}
var field = CsvHelpers.ParseField(line, columnIndex);
if (IsNullOrWhiteSpace(field))
{
continue;
}
if (!match(field, value))
{
continue;
}
yield return
(CsvRow.New(_columns, line));
}
}
private CsvParser(string path, CsvConfig config)
{
var firstLine = CsvHelpers.ReadFirstNotBlankLine(path); // will throw IoException if file does not exist
_path = path;
_isEmpty = firstLine == null;
var header = config.Header ?? firstLine;
_columns = CsvHelpers.ParseHeader(_path, header);
}
string ICsvRow.this[string name]
{
get
{
int index = CsvHelpers.NameToColumnIndex(_columns, name);
if (index >= _fields.Length)
{
return(null);
}
return(_fields[index]);
}
}
