Ok, I'm obviously missing something very basic. I'm very new to Entity Framework.
I want to call stored procedures without importing them, so I was planning on using ExecuteStoreQuery(). According to the documentation, ExecuteStoreQuery is a method of ObjectContext. But, I have no idea where to get my ObjectContext.
I generated my entites using Database First. So far, I have been accessing my entities something like this:
var db = new MyEntities();
PRODUCT p = db.PRODUCTS.First(a => a.PRODUCTSKEY == thekey);
But I can't call db.ExecuteStoreQuery, becase db isn't an ObjectContext.
I've googled how to get ObjectContext from an entity. I find some answers, but they're all flagged with cautions, saying that it's a workaround, and only to use it if you have no other option. Ok, so what is the RIGHT way?
All examples that I've found for using ExecuteStoreQuery assume that you already have your ObjectContext. Not very helpful.
I found one website that stated that the ObjectContext is "automatically generated" by Entity Framework. If that's the case, then where is it?
I'm obviously missing something very simple here. This can't be that difficult.
The ObjectContext class is the primary class for interacting with data as objects that are instances of entity types that are defined in a conceptual model. An instance of the ObjectContext class encapsulates the following: A connection to the database, in the form of an EntityConnection object.
DbContext generally represents a database connection and a set of tables. DbSet is used to represent a table. Your code sample doesn't fit the expected pattern.
If you need to get ObjectContext you can cast your DbContext instance to IObjectContextAdapter interface (it is implemented explicitly) and wrapped ObjectContext instance will be available: ObjectContext context = ((IObjectContextAdapter)db).
A DbContext instance represents a combination of the Unit Of Work and Repository patterns such that it can be used to query from a database and group together changes that will then be written back to the store as a unit. DbContext is conceptually similar to ObjectContext.
To get to the ObjectContext of your DbContext, all you'd need to do is the following:
var objectContext = ((IObjectContextAdapter)myDbContextObject).ObjectContext;
ObjectContext
was replaced by DbContext
in Entity Framework 4.1. Actually DbContext
is an adapter (wrapper) over ObjectContext
. If you need to get ObjectContext
you can cast your DbContext
instance to IObjectContextAdapter
interface (it is implemented explicitly) and wrapped ObjectContext
instance will be available:
ObjectContext context = ((IObjectContextAdapter)db).ObjectContext;
BTW I think you are looking for db.Database.SqlQuery
method.
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