public CsvColumn(CsvHeader header, CsvField field, int index)
{
if (header is null || field is null)
{
throw new ArgumentNullException();
}
Header = header;
Field = field;
Index = index;
}
public CsvFormat(IEnumerable <CsvColumn> columns)
{
if (columns is null)
{
throw new ArgumentNullException();
}
if (!columns.Any())
{
throw new ArgumentException();
}
CsvColumn[] sortedColumns = columns.OrderBy(column => column.Index).ToArray();
int columnCount = sortedColumns.Length;
Fields = new CsvField[columnCount];
Headers = new CsvHeader[columnCount];
for (var i = 0; i < columnCount; i++)
{
Fields[i] = sortedColumns[i].Field;
Headers[i] = sortedColumns[i].Header;
}
}