Dynamic displays correctly in debugger but fails when try to access values

Question

I have a strange issue. I've a method that expects an IEnumerable of dynamic that later I have to iterate to do some things.

The code that invokes the method is this:

GuardarControlCristalesPedidos(
    items.Select(o => new {o.Id, o.CantidadRecibida, o.Cerrado}));

This method is coded as

public static void GuardarControlCristalesPedidos(IEnumerable itemsAGuardar)
{
    var session = FactoryProvider.GetCurrentSession();
    using (var t = session.BeginTransaction())
    {
         foreach (dynamic item in itemsAGuardar)
         {
              var cItem = session.Load<PedidoItem>(item.Id);
              cItem.CantidadRecibida = item.CantidadRecibida;
              cItem.Cerrado = item.Cerrado;
              session.Save(cItem);
         }
         t.Commit();
    }
}

Now, the problem I have is that the program fails throwing 'item.Id' produjo una excepción de tipo 'Microsoft.CSharp.RuntimeBinder.RuntimeBinderException'

But strangely, when I access the dynamic variable with the debugger it seems to be fine (the IDE displays the members fine, but fails when I try to access item.Id

Dynamic Debugger Watch

What is happening here?

Using dynamic is a bad option. use proper type. What is type of itemsAGuardar (this is list of which type)? Use that type instead of dynamic. — fhnaseer, Mar 19 '13 at 12:09
Yes, surely I will end using a strong type... But I just curious of this strange situation — Agustin Meriles, Mar 19 '13 at 12:12
The correct answer can be found here. http://stackoverflow.com/questions/10316344/dynamic-object-runtime-reports-field-not-present-but-can-see-it-in-debugger — Stanley.Goldman, Apr 04 '14 at 15:49

score 0 · Answer 1 · answered Mar 19 '13 at 12:42

0

This probably will be working:

var cItem = session.Load<PedidoItem>((int)item.Id);

answered Mar 19 '13 at 12:42

user2186568

1

Nope... the exception is throwed when trying to access `item.Id`, so the cast will never work – Agustin Meriles Mar 19 '13 at 12:47

Dynamic displays correctly in debugger but fails when try to access values

1 Answers1