CsvHelper 地图集合

Question

我正在使用 CsvHelper 将 csv 文件与学校记录进行映射 最终结果应该是学校列表。 Similar issue can be found here

 public class School
{
    public IList<Student> Students{ get; set; } 
}

public class Student
{
    public StudentRef Reference{ get; set; }
}

public class StudentRef
{
    public string RefNumber{ get; set; }
}

CSV 文件中的一列是 SRef，应该链接到 StudentRef.RefNumber

public sealed class StudentRefMap : CsvClassMap<StudentRef>
    {
        public StudentRefMap ()
        {

            Map(m => m.RefNumber).Name("SRef");
        }
    }

     public sealed class StudentMap : CsvClassMap<Student>
    {
        public StudentMap ()
        {

             References<StudentRefMap >(m => m.Reference);
        }
    }

    public sealed class SchoolMap : CsvClassMap<School>
    {
        public SchoolMap ()
        {

            //References<StudentMap>(m => m.Students);//doesn't work
             Map(m => m.Students)
                .ConvertUsing(row => new List<Student>
                {row.GetRecord<Student>()}); // doesn't work
        }
    }

我想用 Schools 列表映射 csv 文件，但是其中一列是指 StudentRef 所以使用 CSVHelper，我该如何实现？

Answer 1

使用ReferenceMap。 http://joshclose.github.io/CsvHelper/#mapping-reference-map

public sealed class PersonMap : CsvClassMap<Person>
{
    public PersonMap()
    {
        Map( m => m.Id );
        Map( m => m.Name );
        References<AddressMap>( m => m.Address );
    }
}

public sealed class AddressMap : CsvClassMap<Address>
{
    public AddressMap()
    {
        Map( m => m.Street );
        Map( m => m.City );
        Map( m => m.State );
        Map( m => m.Zip );
    }
}