// Entity Framework Classic

// Doc: https://entityframework-classic.net/linq-dynamic

​

// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Collections.Generic;

using System.Data.Entity;

using System.Linq;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        GenerateData();

​

        using (var context = new EntityContext())

        {

            var list = context.Customers.Execute<IEnumerable<Customer>>("Where(x => x.IsActive == true)").ToList();

            FiddleHelper.WriteTable("Customers", list);

            var list2 = context.Customers.Execute<IEnumerable<Customer>>("Where(x => x.IsActive == IsActive)", new { IsActive = false }).ToList();

            FiddleHelper.WriteTable("Customers", list2);        

        }

    }

    public static void GenerateData()

    {

        using (var context = new EntityContext())

        {

            context.Customers.Add(new Customer() { Name ="Customer_A", Description = "Description", IsActive = true, LastLogin = new DateTime(2010,1,1) });

            context.Customers.Add(new Customer() { Name ="Customer_B", Description = "Description", IsActive = false, LastLogin = new DateTime(2010,1,1) });            

            context.Customers.Add(new Customer() { Name ="Customer_C", Description = "Description", IsActive = true, LastLogin = DateTime.Now });

​

            context.BatchSaveChanges(); 

        }

    }

​

    public class EntityContext : DbContext

    {

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

        {

​

        }

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

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public DateTime LastLogin { get; set; }

        public Boolean IsActive { get; set; }

    }

}