I am using Entity Framework 5 code first and ASP.NET MVC 3.
I am struggling to get a child object's child object to populate. Below are my classes..
Application class;
public class Application
{
// Partial list of properties
public virtual ICollection<Child> Children { get; set; }
}
Child class:
public class Child
{
// Partial list of properties
public int ChildRelationshipTypeId { get; set; }
public virtual ChildRelationshipType ChildRelationshipType { get; set; }
}
ChildRelationshipType class:
public class ChildRelationshipType
{
public int Id { get; set; }
public string Name { get; set; }
}
Part of GetAll method in the repository to return all the applications:
return DatabaseContext.Applications
.Include("Children");
The Child class contains a reference to the ChildRelationshipType class. To work with an application's children I would have something like this:
foreach (Child child in application.Children)
{
string childName = child.ChildRelationshipType.Name;
}
I get an error here that the object context is already closed.
How do I specify that each child object must include the ChildRelationshipType object like what I did above?
Best Answer
If you include the library
System.Data.Entityyou can use an overload of theInclude()method which takes a lambda expression instead of a string. You can thenSelect()over children with Linq expressions rather thanstringpaths.