Question

I am trying to bind results returned from queries with dynamic where clauses to a WPF DataGrid.

Using Database.SqlQuery there seems to be no Load() method and no Local() to return an ObservableCollection.
Thus I am using New ObservableCollection(Of Product)(q1).
Is this the recommended usage, or am I missing something?

Using DbSet.SqlQuery I found no way to get at the data at all.
How is this supposed to be used?

Dim _dbc As New AdventureWorksEntities

''Using DbSet
'Dim q = _dbc.Product
'q.Load()
'Dim r = q.Local
'grd.ItemsSource = r

Const sql = "select * from production.product WHERE name LIKE 'fla%' and ProductNumber LIKE '%0'"
'Using Database.SqlQuery
Dim q1 = _dbc.Database.SqlQuery(Of Product)(sql)
Dim r1 = New ObservableCollection(Of Product)(q1)
grd.ItemsSource = r1

''Using DbSet.SqlQuery
'Dim q2 = _dbc.Product.SqlQuery(sql)
''Dim r2 = ???
''grd.ItemsSource = r2

Answer 1

You should be able to achieve what you are looking for by doing the following.

' Load the products
_dbc.Products.SqlQuery(sql).ToList()

' Bind to all loaded products
grd.ItemsSource = _dbc.Products.Local

Also note that the results of Database.SqlQuery() are never tracked in the context so you will have to use DbSet.SqlQuery() if you want to bind to the results using DbSet.Local.

For more information on what DbSet.Local actually contains, please refer to its documentation.