为EF提供即时的自定义数据库提供程序

MetadataWorkspace workspace = new MetadataWorkspace(
     new string[] { \"res://*/\" }, 
     new Assembly[] { Assembly.GetExecutingAssembly() });
using(var conn = /* my custom wrapped DbConnection */)
{
    var provider = DbProviderServices
          .GetProviderServices(conn); // returns my custom DbProviderServices
    var factory = DbProviderServices
          .GetProviderFactory(conn); // returns my custom DbProviderFactory
    ...

    using (var ec = new EntityConnection(workspace,conn))
    using (var model = new Entities(ec))
    {
        count = model.Users.Count(); // BOOM!
    }

conn

DbCommand

SSpace

private readonly

    StoreItemCollection itemCollection =
        (StoreItemCollection)workspace.GetItemCollection(DataSpace.SSpace);
    itemCollection.GetType().GetField(\"_providerFactory\",
        BindingFlags.NonPublic | BindingFlags.Instance)
        .SetValue(itemCollection, factory);