It's great to see Colin Meek finally blogging. Colin has been a wealth of information on the MSDN Forums for Entity Fraemwrok related questions. It is also COlin who posted teh Entity Framework Extensions on CodeGallery a few days ago.

Colin talks about the extension in his first post and how they can be used to handle a variety of Stored Procedure scenarios in Entity Framework.

For what looks like a pretty complete list of the blogs of the Entity Framework team and others on the Data Programmability team at Microsoft, see the Resources page of the DataDeveloper.NET website.

Thanks to Alex for the heads' up....

Because of a bug in the way the schema files are created, the behavior for embedding the model into your assembly and the impact on using that assembly in other projects is a little funky. This will change with the next iteration of the EF that we will see as it has been fixed.

In the meantime, there are two things to keep in mind.

1) When you compile, even if you want the files embedded, choose the Copy to Output Directory option for Metadata Artifact Processing, then build, then change the option to Embed in Output Assembly.

2) If you make a change to the model and rebuild, after it is already being referenced by another project, you may or may not get the changes reflected in the assembly and therefore the client project will still fail. In most cases, doing the 2-step build will do the trick. In other cases, it is necessary to go into the bin directory of the model's project and delete all of the schema files (csdl, msl & ssdl) or just delete every thing in there, then do the two step rebuild again.

As I've been working on samples over and over and over, and adjusting my model, I've gotten into the habit of doing this.

One easy red-flag that you need to do this is if you get an error message complaining about C-side vs. O-side. That means that something in the CSDL is different than the classes (O=Objects) that were codegen'd. So you while the assembly does have the updated classes, it doesn't have the updated model.

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Cool - two in one day!

Another goody on the ADO.NET Entity Framework & LINQ to Relational Data Code Gallery page ...

Entity Framework Extensions Library. I'll subtitle this as "stuff we couldn't get into v1, but know you need"!

The first one today was a tool to help you visualize what different types of mapping in an EDM do and what their schema looks like - EF Mapping Helper.

from KIDSvt.com

Are you an ASP.NET / SQL Server Developer?  Are you looking for more clients?

There's a new very cool tool on MSDN Code Gallery from the EF Team called EF Mapping Helper.

What it does is allow you to select various mapping scenarios (eg. TPH Inheritance) and the helper will display a visual image of what the mapping does and the actual XML of the CSDL, SSDL and MSL so you can see what it looks like in the actual schema.

You can combine the mapping types to see how they all look together as well.

This is a huge benefit because sometimes it's just hard to set these things up, therefore how can you see the impact. It's a really great way to look at this - if you are not afraid to look at XML. (Since the visual designer can't do everything, it's useful (to say the least) to know how to work in the XML.)

It will also give ideas of some of the cool things you can do with mapping in an EDM that you may not have thought about. EDM's highest power is in it's ability to really shape your conceptual layer in ways that you can't do with traditional ORMs. But learning all of the different ways to customize a model can be daunting. So I'm really happy to see this tool!

Here's a view of a TPH mapping (click on image for full size)

and a view of a model that contains a TPH and TPC (table per concrete type). It's quite dizzying, so I'd recommend looking at individual mapping scenarios first.

Bill McCarthy pointed out something I hadn't noticed before.

On the VSExpress product highlights page, it kinda rubs it in our noses.

On the other hand, to the right of the images, VB & C# are treated equally

Bill is a devout champion of VB when it comes to how Microsoft itself, positions the language.

IdeaBlade has a 45 minute webcast demonstrating their Entity Framework implementation. They have taken EF and plugged it into their pre-existing framework which already knows how to do a lot of the things that the EF APIs can't do yet. They also have extended the design tools (even with a pluralizer sniff sniff). They have extended the EDMX by adding additional attributes (which apparently won't prevent the model from being used elsewhere) and replace the objectContext with their own object manager.

I'm really impressed. Because they already had their framework that they could plug EF into, they are light years ahead of me, who is starting from scratch trying to figure out how to make EF do these things on it's own - which in some cases is not an easy task.

Some of the things that DEF can do that I am struggling with are

• Use objects across tiers
• Use objects across tiers without needing EF on the client
• Roll back changes to the object cache
• Query the object cache without hitting the database.

There's more, but it's too depressing to keep listing. I'm just kidding about it being depressing. I'm actually very happy to see someone prove that the EDM and the Entity Framework can be used (even if it takes some tweaking) in real enterprise applications.

I'm also a little envious. It would have been fun to work on this project with all of the resources and existing IP they had at their disposal.

Check out the video.

I am in the terribly pathetic position of having to try to let people know about my workshop because it was inadvertantly ommitted from the printed brochure which has been inserted in the past few issues of MSDN Magazine and aspNetPRO magazine.

My workshop is listed on the website and the online schedule, but not in the printed brochure, so I think lots of people who may be interested, will not even be aware of it.

This is the start of the full Data Access track at DevConnections. We'll have non-stop data access sessions for four straight days!

Here is a link to the Pre-Conference Workshop page.

SO here it is again:

VPR204: ADO.NET Entity Framework: From 0 to 60 (9:00am - 4:00pm)
Add'l Fee $399
Julia Lerman
This full day workshop will provide you with a full overview of the soon-to-be released ADO.NET Entity Framework, Microsoft's new core data platform. In this workshop, you will learn what the Entity Framework is and how it fits into your application and enterprise architecture. We will begin with an introduction to the Entity Data model, how to build it, and how to implement it in its simplest form. Then you will learn how to take advantage of the true power of the Entity Data Model by creating customized mappings and implementing it in real-world multi-tier architectures. You will learn how to query Entity Data Models using LINQ to Entities, Entity SQL with Object Services, and stream data with Entity Client. The workshop will also explore some of the more complex features of object services as well as offer guidance as to when and where to you will want to use the Entity Data Model and which of its core querying methods is right for different scenarios.

I'll be doing this workshop in at the Developer Summit in Stockholm on April 11th as well.

To our right is Code Camp 9 in Waltham April 5-6.

To our left is the first Code Camp in Albany, Tech Valley Code Camp, April 19th. I'll be on a plane to Orlando that day for DevConnections.

From INETA:

Code Camp 9 has a beautiful new logo created by Bryan Philips.

Chris Bowen reports that the session for the April 5-6 Code Camp are filling up and the registrations are as well. At last count there are 40 sessions submitted.

Deadline for abstract submission is March 24th.

There is an introductory track this year which is a great opportunity for people who are new to presenting to do a session. In addition, Chalk Talks are a fabulous way to lead a conversation about something that you are interested in wtihout having to do the work of preparing a session and demos or worry about standing in front of an audience giving  presentation.

Submit sessions and register at www.TheDevCommunity.org.

As a book-writing newbie, I have had to learn to say "no" when I'm used to always saying "yes". For example, I just turned down an invitation to speak at a conference in India. I've never been to India. I hope I'll get invited again.

But you know it's serious when I had to say "no" to watching the first NEW episode in forever of Two and a Half Men last night. It pained me to hear Rich laughing his butt off while I stayed in front of my computer and tried to keep focused.

It's gotten to the point that I was grumbling about having to go to a Dr. appointment on Monday. But I figured, heck, if I die, I can't work anyway, so I might as well go and make sure I'm okay. Luckily it wasn't a doctor who work in the mental health field. Surely they would have locked me up immediately!

Then of course there's the skiing and other forms of exercise that I'm not getting. Thankfully (for me, not for the Mad River Glen's finances) the snow has been dreadful lately.

My saving grace was that the power went out yesterday for an hour. SO I went outside and took a "brisk walk" (is that a sign of age? Not even a run!).

I was thrilled this evening when Rich presented me with an altered part to an old bike trainer that I was hoping to use at least to get some spinning in. The trainer didn't fit my bike. So Rich altered the part and now it fits. Yay. Of course, I'm not on it, I'm working (well, blogging only for a momentary diversion).

It just occurred to me that this blog post sounds like an Andy Rooney commentary. Egad! Well back to work. Tick tick tick.

Red-Gate is one of those companies that you just can't help but love. They produce phonemenally useful and popular developer /data developer tools, and the community facing people are a joy to work with. It doesn't surprise me that this stems from a company with a good soul. So it's no surprise (but still quite nice) to read that they have been chosen (for the 2nd year in a row) as one of the "Top 100 Best Small Companies to Work For" in the U.K. by the Sunday Times. Read more on Red-Gates's website.

Scott Galloway recently joined the ASP.NET team as a P.M. for ASP.NET 3.5. Congratulations!

My conspiracy theory is that Microsoft is actually building a new team for a new product called Scott.NET.

Who's next? Scott Mitchell? Scott Watermasysk? K.Scott Allen? There are still a LOT of ASP.NET Scotts not yet on the payroll.

The DataDeveloper.NET website has got some new bling!

I'm using one on the home page of my blog so it's easy for visitors to my blog to find it.

As per my previous blog post, I have just installed CR2008 Service Pack 0 and tested a report that I was unable to run when I upgraded from CRXI to CR2008. Not only did the bug go away, but now I am experiencing some amazing performance gains thanks to the new version of Crystal Reports. Read more here

[A New DevLife Post]

In my article, What Visual Studio Developer Should Know about Crystal Reports 2008, for ASPAlliance, I pointed out the fact that CR2008 integrates with VS2003 and VS2005 but NOT VS2008 and that this would be eventually be rectified with a Service Pack.

Thanks to Guy Barrette's blog post "Will the real Crystal Reports 2008 stand up?", (and because I still can't figure out how to subscribe to the Crystal Reports team blog), I learned that the service pack that fixes this is out.

The Crystal Report's blog post about the service pack [Crystal Reports 2008 Service Pack 0] details the changes. Those related to Flash integration and Business Objects Enterprise connectivity aren't of interest to me, per se, but the VS2008 integration definitely is. It also says that CR2008 now runs on Windows 64 bit O/S.

The blog also points out that "It is also now available through the Update Service.  Use Help > Check for Updates within Crystal Reports 2008 to update your version. " but since my 30 day trial ran out I didn't realize this. Now it's time for me to see if the other showstopper problem for me has been resolved.

I'll report back.

[thanks to Roger Jennings for the correction about spatial data]

Samir Bajaj, a developer on the Entity Framework team has begun his blog with a bang.

He describes a sample application (available on MSDN Code Gallery) that can switch  between LINQ to SQL or ENtity Framework, highlighting the differences between the two.

The application targets an business case that he is very familiar with  - searching  a database filled with drawings which are based on a collection of shapes. Samir has a background working for a CAD company and explains that it is a common task to search for drawings that contain particular shapes.

Thanks to SQL Server 2008's new spatial data, this gets really interesting.

Added: While SQL Server 2008's spatial data may have been an inspiration, it will not be not supported by LINQ to SQL or EF in the near future, so Samir is using his own techniques with SQL Server 2005.

Check out his blog post and then the app, called Sketchpad (requires SQL Server 2008 CTP)

THANK YOU!!!