'tostring'方法ASP.NET MVC没有重载

Question

I have this code and I am giving this error in which I can not solve.

code:

  public ActionResult GetData()
    {
        DateTime data = context.Reserva.Select(x => x.DataEntrada).ToString("MMMM");
        int ID = context.Reserva.Select(x => x.ID_Cliente).Count();
        Reserva obj = new Reserva();
        obj.DataEntrada = data;
        obj.ID_Cliente = ID;
        return Json(obj, JsonRequestBehavior.AllowGet);
    }

here: DateTime data = context.Reserva.Select(x => x.DataEntrada).ToString("MMMM");

When running the code, I get this error:

no overload for the 'toString' method

Model

namespace WebApplication.Models.BaseDados
{
    using System;
    using System.Collections.Generic;

    public partial class Reserva
    {
        public int ID_Reserva { get; set; }
        public int ID_Cliente { get; set; }
        public System.DateTime DataEntrada { get; set; }
        public Nullable<System.DateTime> DataSaida { get; set; }
        public string TipoQuarto { get; set; }
        public int NumeroQuarto { get; set; }
        public Nullable<int> NumeroNoites { get; set; }
        public Nullable<decimal> Preço { get; set; }
        public string Observaçoes { get; set; }

        public virtual Cliente Cliente { get; set; }
    }
}

Answer 1

Assuming context.Reserva is indeed Reserva type. You don't even need Select , so just access the DataEntrada property directly. DataEntrada is type of DateTime , so you don't convert it ToString

DateTime data = context.Reserva.DataEntrada;

Also (not related to your question) as the follow up, the line after that is also wrong.

int ID = context.Reserva.ID_Cliente;