EntityFramework.Include

A library that extends Include of Entity Framework to provide filtering navigation property.

Required EntityFramework version is 6.1.3.

##Download EntityFramework.Include is available on nuget.org -> EntityFramework.Include

To install EntityFramework.Include, run the following command in Package Manager Console.

PM> Install-Package EntityFramework.Include

##Usage

//Required using EntityFramework.Include.Extensions

//Example Entity...
public class Parent
{
    public int Id { get; set; }

    public int Age { get; set; }
    
    [NotMapped]
    public int ChildrenCount { get; set; }

    public List<Child> Children { get; set; } = new List<Child>();
}

public class Child
{
    public int Id { get; set; }

    public int Age { get; set; }
}

//In code...
var list = context.ParentSet.Include(p => p.Children, p => p.Children.Take(10).ToList())
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToListWithInclude();

Console.WriteLine(list.First().Children.Count); //10
Console.WriteLine(list.First().ChildrenCount); //output all Children count

To retrieve as List or T[], use ToListWithInclude/Aysnc or ToArrayWithInclude/Aysnc

var list = context.ParentSet.Include(p => p.Children, p => p.Children.Take(10).ToList())
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToListWithInclude();
                            
var array = context.ParentSet.Include(p => p.Children, p => p.Children.Take(10).ToList())
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToArrayWithInclude();

If include same property, the last include will be preferred

var list = context.ParentSet.Include(p => p.Children, p => p.Children.Take(10).ToList())
                            .Include(p => p.Children, p => p.Children.Take(20).ToList()) //duplicate
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToListWithInclude();
                            
Console.WriteLine(list.First().Children.Count); //20

##Notice

You can't use default Include of Entity Framework now.

var list = context.ParentSet.Include(p => p.Children) //Doesn't work now.
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToListWithInclude();

So describe like this

var list = context.ParentSet.Include(p => p.Children, p => p.Children) //This works.
                            .Include(p => P.ChildrenCount, p => p.Children.Count)
                            .ToListWithInclude();