// Entity Framework Plus

// Doc: https://entityframework-plus.net/query-future

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

// @nuget: Z.EntityFramework.Plus.EFCore

​

using System;

using System.Linq;

using Z.EntityFramework.Plus;

using Microsoft.EntityFrameworkCore;

using Microsoft.Data.SqlClient;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        GenerateData();

​

        // Update: UPDATE all rows from the database using a LINQ Query without loading entities in the context.

        using (var context = new EntityContext())

        {

            // GET the minimum and maximum product prices

            var futureMaxPrice = context.Products.DeferredMax(x => x.Prices).FutureValue<int>();

            var futureMinPrice = context.Products.DeferredMin(x => x.Prices).FutureValue<int>();

​

            // TRIGGER all pending queries

            int maxPrice = futureMaxPrice.Value;

​

            // The future query is already resolved and contains the result

            int minPrice = futureMinPrice.Value;

​

            int i = 0;

​

            Console.WriteLine("Max Price: {0}", maxPrice);

            Console.WriteLine("Min Price: {0}", minPrice);

        }

    }

​

    public static void GenerateData()

    {

​

        using (var context = new EntityContext())

        {

            context.Products.Add(new Product() { Name = "Product_A", IsActive = false, Prices = 35 });

            context.Products.Add(new Product() { Name = "Product_B", IsActive = true, Prices = 22 });

            context.Products.Add(new Product() { Name = "Product_C", IsActive = true, Prices = 37 });

            context.Products.Add(new Product() { Name = "Product_D", IsActive = true, Prices = 7 });

​

            context.SaveChanges();

        }

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() 

        {

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

            optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

​

            base.OnConfiguring(optionsBuilder);

        }

        public DbSet<Product> Products { get; set; }

    }

​

    public class Product

    {

        public int ProductId { get; set; }

        public string Name { get; set; }

        public bool IsActive { get; set; }

        public int Prices { get; set; }

    }

}