Class Map

Override CreateClassMap() on the derived request type to supply a CsvHelper ClassMap instead of relying on attributes:

Import

public sealed class ImportUsersRequest : CsvRequest<UserImportRow>
{
    public static ValueTask<ImportUsersRequest> BindAsync(HttpContext context)
        => BindCsvAsync<ImportUsersRequest>(context);

    protected override ClassMap CreateClassMap() => new UserImportRowMap();
}

public sealed class UserImportRowMap : ClassMap<UserImportRow>
{
    public UserImportRowMap()
    {
        Map(r => r.Name).Name("full_name");
        Map(r => r.Email).Name("email_address");
    }
}

Export

The same CreateClassMap() override is available on CsvResponse<TRow> via the classMap parameter of CsvResponse.From:

CsvResponse.From(rows, classMap: new UserExportRowMap(), fileName: "users.csv")

For the full CSV import example, see CSV Import. For export, see CSV Export.