EF Classic - LINQ Dynamic - Execute

CSharp · Console

/Program.cs

// 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; }
	}
}