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

This does the trick as a mapper.

public sealed class PersonMap : CsvClassMap
{
    private List attributeColumns = 
        new List { "Attribute1", "Attribute2", "Attribute3" };

    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 =>
            attributeColumns
                .Select(column => row.GetField(column))
                .Where(value => String.IsNullOrWhiteSpace(value) == false)
            );
    }
}

Then you just need something like this

using (var reader = new CsvReader(new StreamReader(filePath)))
{
    reader.Configuration.RegisterClassMap();
    while (reader.Read())
    {
        var card = reader.GetRecord();
    }
}