如何传递参数以包含在 URL 中？

Question

In the repository class of WebApi project there is the method GetSingleIncluding() that returns an entity with indluded objects that were passed as parameters.

private readonly EFDbContext _context;
private IDbSet<T> _entities;            
private IDbSet<T> Entities
{
    get
    {
        _entities = _entities ?? _context.Set<T>();
        return _entities;
    }
}               
public T GetSingleIncluding(int id, params Expression<Func<T, object>>[] includeProperties)
{
    var query = Entities.Where(x => x.ID == id);

    foreach (var includeProperty in includeProperties)
    {
        query = query.Include(includeProperty);
    }

    return query.First();
}

I have an action in a controller

public HttpResponseMessage GetFull(int id, string entities)

I use it as:

var entitiy = Repository.GetSingleIncluding(id, x => x.Person);

here I pass explicitly a parameter x => x.Persons

Is there any way to pass this parameters by url request? Eg I will pass all objects (that can be include for the current entity) as string in the url

http://localhost/api/House/1/Person,Address,...

and the controller will be pass these params to the GetSingleIncluding() method:

Repository.GetSingleIncluding(id, x => x.Person, y => y.Address);

House entity

public class House : BaseEntity
{
        public int PersonID { get; set; }
        public int HouseID { get; set; }
        public int AddressID { get; set; }
        ...
        public virtual Person Person { get; set; }        
        public virtual Address Address { get; set; }
 }

Answer 1

I Agree with Mister Epic, I think it is not a good idea getting the "includes" from the url. Any way, you can pass to your method an array of strings:

public T GetSingleIncluding(int id, string[] includeProperties)
{
    var query = Entities.Where(x => x.ID == id);

    if (includeProperties != null && includeProperties.Count() > 0)
    {
        query = query.Include(includes.First());
        foreach (var include in includeProperties.Skip(1))
            query = query.Include(include);
    }

    return query.First();
}

You need to add this "using":

using System.Data.Entity;

Answer 2

You should have a look at odata.It has build in capabilities for adding includes. Take a look at this link and read about the $expand parameter.