In the client application, I input an item id, and the WCF server is supposed to return an object of type ItemDTO. However, when the reply is made, the object is empty.
ItemDTO itm = Connection.Instance.HttpProxy.GetItem(ItemID);
What I can confirm so far:
- The item requested is successfully taken from the database
- The mapping did work (checked the contents of the resulting mapping)
The contents was indeed sent (checked using Fiddler)
However, when I check the contents of
itm, it's empty.
This is the GetItem() method in the WCF Server:
public ItemDTO GetItem(string itemID) {
using (var db = new PoSEntities()) {
var query = from i in db.Items
where i.ItemID.Equals(itemID)
select i;
Item item = query.FirstOrDefault();
return item == null ? null : Mapping.Map<Item, ItemDTO>(item);
}
}
I use AutoMapper to map the entity object to the DTO:
public static H Map<T, H>(T i) {
Mapper.CreateMap<T, H>();
return Mapper.Map<T, H>(i);
}
The Item class is generated by Entity Framework:
public partial class Item
{
public Item()
{
this.Sal1 = new HashSet<Sal1>();
}
public string ItemID { get; set; }
public string Name { get; set; }
public string Manufacturer { get; set; }
public int StockQuantity { get; set; }
public decimal Price { get; set; }
public virtual ICollection<Sal1> Sal1 { get; set; }
}
Connection class:
public sealed class Connection {
private readonly string _address = "http://Edwin:8080/PoS";
private static Connection _instance;
private static object _padLock = new Object();
private static ChannelFactory<IPoS> httpFactory;
private static IPoS _httpProxy; //Singleton
public IPoS HttpProxy { get { return _httpProxy; } }
public static Connection Instance {
get {
if (_instance == null) {
lock (_padLock) {
if (_instance == null) {
_instance = new Connection();
}
}
}
return _instance;
}
}
private Connection() {
httpFactory = new ChannelFactory<IPoS>(
new BasicHttpBinding(),
new EndpointAddress(_address));
_httpProxy = httpFactory.CreateChannel();
}
}
ItemDTO Class:
[DataContract]
public class ItemDTO {
[DataMember]
public string ItemID { get; set; }
[DataMember]
public string Name { get; set; }
[DataMember]
public string Manufacturer { get; set; }
[DataMember]
public int StockQuantity { get; set; }
[DataMember]
public decimal Price { get; set; }
}