Thanks for attending the ONETUG Brown Bag meeting today where I did a quick look at various approaches to working with EF: database/model/code first, working with POCOs and legacy classes and talking about range of using EF in RAD apps to a more architected enterprise app.

You can find my PowerPoint (which I kept losing thanks to not bringing along my Live Meeting manager) at http://www.slideshare.net/JulieLerman/perspectives-on-ef. The slides are a little more of the zen presentation style… not much in the way of bullet points/details. If you are trying to get the meat of the presentation, it won’t be of much use. Sorry.

The application I showed at the end (MVC app with various projects for entities, model, repositories, testing, interfaces) is from Chapter 27 of my book, Programming Entity Framework 2nd Edition. You can find the sample code for that chapter (as well as others) on the downloads page of my book website.

If you watched the presentation, I had a strange problem when I was trying to modify the model to line a property name  up with my POCO class. The original name was “Name” and the new name was “RoomName”. There was an error indicating that the model still had “Name” which was not true.

The reason for this was because I was using a solution that I’ve used for a number of demos and it had a phantom DLL in the bin directory with a different version of the model, a version that was still using “Name” for that particular property. EF was most likely finding that embedded model first, hence it’s complaints. Once I deleted all of the bin files and rebuilt, things worked as expected. Cleaning the solution did *not* do the trick. I had to explicitly delete those files. These things only happen when you are presenting live and it’s being recorded for posterity. I have made my monthly sacrifice to the demo gods.

On Monday Sept 27th, Rachel Appel, Steve Bohlen and I presented a full day of Entity Framework presentations at the Entity Framework NYC Firestarter to help developers get started with EF.

The combined slides from our six sessions are on SlideShare.NET at Entity Framework NYC Firestarter (note that there is currently a gap as I await the slides from Session #3).

You can get the demos from my presentations on the downloads page of my book’s website, learnentityframework.com/downloads.

Here are direct links:

• Session #1: It’s Time to Look at Entity Framework. There were no demos from this session. It was mostly theory with a little bit of exploration in Visual Studio.
• Session #4: Entity Framework POCO Support Basics: Lerman EF POCOs demo.zip
• Session #5: Disconnected strategies (WCF/ASP.NET) : 1) Lerman Sample for nTier Web Forms with EF.zip, 2) Custom WCF (POCOs) Solution with Console UI
• Session #6: Writing Testable/Maintainable Apps with EF : 1) Lerman Persistence Ignorant EF Presentation Demos.zip

Be sure to check the readme.txt files in the downloads.

Watch our blogs, as well as Peter Laudati’s, for the “eventual consistency” scenario where you can find links to all 6 sessions and the slides in one place!

I have posted the slides and demos for two of my three NECC14 talks that I did yesterday (Oct 2nd) on the downloads page of my book’s website at   http://learnentityframework.com/downloads/#conf

You’ll find the demos for Persistence Ignorant Entity Framework 4 and n-Tier ASP.NET Web Forms Apps with Entity Framework. Look in the conference section.

The slides are on SlideShare (www.slideshare.net/julielerman).

I did a third talk (Unit Testing for ‘Fraidy Cats Like Me” but it did not have a powerpoint and is not a talk that generated demos.