Question

I’m using Visual Studio 2010 Express with Framework 4.0 and if I am correct, it comes with Entity Framework 4.

My ObjectContext is defined as:

public partial class CreaturesEntities : global::System.Data.Objects.ObjectContext

I tried to use ExecuteStoreQuery :

using System.Data.Objects;
using System.Data.Entity;
[...]
context = new CreaturesEntities();
string query = "select type, min(value) value from saving_throw where ";
string conditions = "(classe_id=" + classe_id + " and level=" + level1 + ")";
if (classe.subclass1_id != null)
    conditions += " or (classe_id=" + classe.subclass1_id + " and level=" + level1 + ")";
if (classe.subclass2_id != null)
    conditions += " or (classe_id=" + classe.subclass2_id + " and level=" + level2 + ")";
if (classe.subclass3_id != null)
    conditions += " or (classe_id=" + classe.subclass3_id + " and level=" + level3 + ")";
query = query + conditions + " group by type";
var q = context.ExecuteStoreQuery<SimpleNumber>(query);
// SimpleNumber is a class with an int property, I suppose ExecuteStoreQuery<Integer> wouldn't work?

When I type “context.”, I can’t find ExecuteStoreQuery in context menu, which means it is not available for whatever reasons.
I can’t find anything about a missing method in ObjectContext.
Does this mean that Visual Studio 2010 Express doesn’t include Entity Framework 4 ? Because standard edition does, and it would be strange that express edition uses an older version.

Of course, I could use a classic DataReader but ExecuteStoreQuery is a lot better.

Any idea?

Edit : I change query to the real one to explain why ExecuteStoreQuery is sometimes easier for complex query (at least for beginners in LINQ To Entities)

Answer 1

Why not use LINQ to Entities instead?

context.Spells.Where(s => s.ID.Equals(1));