LinQ语句中列表上的空数据

Question

I got this LinQ statement

var daysList = new List<int>(new int[30]);

 var model_pdv = db_pdv.Pdv.GroupBy(x => new { Pdv = x.Clave_PDV, Nombre_Pdv = x.Nombre_Pdv})
            .Select(x => new DishVM()
            {
                Clave_PDV = x.Key.Pdv,
                Nombre_Pdv = x.Key.Nombre_Pdv,
                Days = daysList,
                Data = x
            }).ToList();

However i dont know why my "Data" List inside my LinQ gets empty values the first time but then i saves the LinQ as it should

This is my DishVm Class:

 public class DishVM
{
    public string Clave_PDV { get; set; }
    public string Nombre_Pdv { get; set; }
    public IEnumerable<Pdv> Data { get; set; }
}

And my Pdv class:

 public class Pdv
{
    public string Clave_PDV { get; set; }
    public string Nombre_Pdv { get; set; }
}

How can i avoid the empty Data List?

Answer 1

The type of x within your Select statement is IGrouping, change it to produce a list:

var model_pdv = db_pdv.Pdv.GroupBy(x => new { Pdv = x.Clave_PDV, Nombre_Pdv = x.Nombre_Pdv})
            .Select(x => new DishVM()
            {
                Clave_PDV = x.Key.Pdv,
                Nombre_Pdv = x.Key.Nombre_Pdv,
                Days = daysList,
                Data = x.ToList()
            }).ToList();