CsvHelper - read in multiple columns to a single list

Question

I\'m using CSVHelper to read in lots of data

I\'m wondering if it\'s possible to read the last n columns in and transpose them to a list

Answer 1

You don't actually need to define the column names beforehand, you can get them from the FieldHeaders property. So in a more dynamic version of Neil's answer you could define your Mapper as such:

public sealed class PersonMap : CsvClassMap {
    public override void CreateMap() {
        Map(m => m.FirstName).Name("FirstName").Index(0);
        Map(m => m.LastName).Name("LastName").Index(1);
        Map(m => m.Attributes).ConvertUsing(row =>
            (row as CsvReader)?.FieldHeaders
                 .Where(header => header.StartsWith("Attribute"))
                 .Select(header => row.GetField(header))
                 .Where(value => !string.IsNullOrWhiteSpace(value))
                 .ToList()
        );
    }
}