Question

In my repository, I get data from my TransportedMaterial table. I also ‘include’ TransportedMaterialPacking to retrieve all related data in this linked table. In this last table I also would like to retrieve the related MaterialPacking data. I don’t know how?

On the picture above we see that the MaterialPacking is null (it has not been filled).

Here are the models:

public class TransportedMaterialPacking
{
    public int TransportedMaterialPackingID { get; set; }
    public MaterialPacking MaterialPacking { get; set; }
    public double Quantity { get; set; }
    public double? Width { get; set; }
    public double? Height { get; set; }
    public double? Length { get; set; }
}

public class MaterialPacking
{
    public int MaterialPackingID { get; set; }
    public string DescriptionFr { get; set; }
    public string DescriptionNl { get; set; }
}

The relations are like this:

TransportedMaterial >> TransportedMaterialPacking >> MaterialPacking

public static class ORMExtensions
{
    public static IQueryable<T> MyInclude<T, C>(this IQueryable<T> source, Expression<Func<T, C>> function)
        where C : class
        where T : class
    {
        return source.Include(function);
    }

I use Entity framework.

Thanks.

Answer 1

You can ‘cascade’ include by doing something like foo.Include("NavigationProperty.SubNavigationProperty") in your query.

Edit Using property notation to include navigation subproperties is possible, see this for example.