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POAttach additional ObjectSets to ObjectContext from separate project
 

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    <p>I hope this makes sense. I have a ASP.NET web application that uses Entity Framework. I have added a couple of custom tables to the db and created a separate project to handle the CRUD operations for those tables. I chose the separate project because I don't want future upgrades to the application to overwrite my custom features.</p> <p>My problem is this. How do I attach/combine my custom ObjectContext to the ObjectContext of the application? I want to use the same UnitOfWorkScope (already in the application) to maintain the one ObjectContext instance per HTTP request. Again, I don't want to add my ObjectSets to the application's ObjectContext for my reason listed above.</p> <p>Here is some code:</p> <p>Widget.cs</p> <pre><code>public partial class Widget { public Widget() { } public int WidgetId {get;set;} public string WidgetName {get;set;} } </code></pre> <p>WidgetObjectContext.cs</p> <pre><code>public partial class WidgetObjectContext : ObjectContext { private readonly Dictionary&lt;Type, object&gt; _entitySets; public ObjectSet&lt;T&gt; EntitySet&lt;T&gt;() where T : BaseEntity { var t = typeof(T); object match; if(!_entitySets.TryGetValue(t, out match)) { match = CreateObjectSet&lt;T&gt;(); _entitySets.Add(t, match); } return (ObjectSet&lt;T&gt;)match; } public ObjectSet&lt;Widget&gt; Widgets { get { if((_widgets == null)) { _widgets = CreateObjectSet&lt;Widget&gt;(); } return _widget; } } private ObjectSet&lt;Widget&gt; _widgets; </code></pre> <p>In my WidgetManager class if I was using the application's ObjectContext I would query my tables like this:</p> <pre><code>var context = ObjectContextHelper.CurrentObjectContext; var query = from c in context.ObjectSet .... etc </code></pre> <p>What I want would be to do something like this:</p> <pre><code>var context = ObjectContextHelper.CurrentObjectContext.Attach(WidgetObjectContext); </code></pre> <p>I know this won't work but that is the gist of what I am trying to accomplish. Hope this is clear enough. Thanks. </p>
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