// Dynamic LINQ - stef

​

// @nuget: System.Linq.Dynamic.Core

// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Data.Entity;

using System.Linq.Dynamic.Core;

public class Program

{   

    public static void Main()

    {

        GenerateData();

        var context = new EntityContext();

        var list = context.Customers

            .Include(c => c.Location)

            .Select("new (Name, np(Location.Name, \"unknown\") as Location)")

            .ToDynamicList();

​

        foreach (var result in list)

        {

            Console.WriteLine($"Name = '{result.Name}', Location = '{result.Location}'");

        }

    }

    public static void GenerateData()

    {

        var list = new List<Customer>();

        list.Add(new Customer()

        {

            Name = "Terri Lee Duffy",

            CompanyName = "ABC",

            City = "Paris",

            Phone = "333-444444",

            Location = new Location() { Name = "test" },            

        });

​

        list.Add(new Customer()

        {

            Name = "Janice Galvin",

            CompanyName = "XYZ",

            City = "London",

            Phone = "333-555555",            

        });

​

        list.Add(new Customer()

        {

            Name = "Michael Raheem",

            CompanyName = "DEF",

            City = "New York",

            Phone = "111-555555",            

        });

​

        list.Add(new Customer()

        {

            Name = "Michael Sullivan",

            CompanyName = "ABC",

            City = "Paris",

            Phone = "333-888888",

        });

​

        list.Add(new Customer()

        {

            Name = "Rebecca Bradley",

            CompanyName = "KLM",

            City = "Tokyo",

            Phone = "333-666666",

            Location = new Location() { Name = "test" },

        });

        using (var context = new EntityContext())

        {

            context.Customers.AddRange(list);

            context.BulkSaveChanges();

        }

    }

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

        }

        public DbSet<Customer> Customers { get; set; }

        public DbSet<Location> Locations { get; set; }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string CompanyName { get; set; }

        public string City { get; set; }

        public string Phone { get; set; }

        public Location Location { get; set; }

    }

    public class Location

    {

        public int LocationID { get; set; }

        public string Name { get; set; }

    }

}