Someone posted a question in the Entity Framework MSDN forum asking for an example of overriding SaveChanges. I thought I had posted one in an early thread but couldn't find it. Nor could I find an obvious example anywhere on the web, so I thought I would put one here on my blog. There aren't a lot of...

August 2008 Note: the datadeveloper.net site is "in between hosts". I am not responsible for this site, just a contributor. I don't have access to the tutorials but I have found some copies of them and am putting them here: www.learnentityframework.com/tutorials . I've written a set of Entity Framework...

August 2008 Note: the datadeveloper.net site is "in between hosts". I am not responsible for this site, just a contributor. I don't have access to the tutorials but I have found some copies of them and am putting them here: www.learnentityframework.com/tutorials . I've written a set of Entity...

I followed the great walkthrough on Brad's blog showing how to use MVC together with Entity Framework . But I did it my own way - in VB, using a different database and trying to write more effective EF queries. I have a simple solution that renders these views from the AdventureWorksLT database: Start...

In the TabletPC SDKs and in WPF it's very easy to take an ink image and save it to an image format - BMP, JPG, etc. Then came Silverlight and the InkPresenter and naturally I wanted to do the same. But it wasn't so easy. Silverlight itself isn't bogged down with that functionality. So you first need...

I thought I would give the Xceed WPF DataGrid (it's free!) a whirl with Entity Framework databinding. So far I have only explored the basics - no anonymous types or sprocs and I am only working with a READ-ONLY scenario. (I did notice something in their docs about being able to modify and delete but...

Note: This blog post explains theory as well as steps to implementing the stored proc. If you read my blog regularly, you are used to this. 11/30/09:Anoter note! Don't miss the fact that this is for the verison of EF in VS2008 SP1. Things have been greatly improved in VS2010. Check out this *much newer...

Note: With the RTM of Entity Framework, the model's Metadata Artifact Processing property is set to Embed in Output Assembly by default, whcih is the opposite of what is described in this blog post based on Beta 3. One of the new features in Entity Framework Beta3 is the ability to embed the csdl, msl...

I've done this demo many times in conference and user group sessions. Someone on the ADO.NET forums asked how to do it and I thought I would just do a quick tutorial with screenshots. What this Tutorial does is demonstrate how to create and use a data source from a particular entity in the model. I'm...

In a recent ADO.NET forum post, someone asked how to do read-only views of data. There were two responses - use a QueryView and use a Defining Query. What's the difference? A Query view is an Entity SQL Query that exists right in your mapping layer. It allows you to solve two problems. THe first is creating...

With the current CTP of the ENtity Data Model Tools, there is no way to automatically update or refresh the EDM when a change is made to the data store. One of the beauties of the EDM is that fixing up the EDM in these cases is not only easy, but it doesn't need to have any impact on your application...

I had to figure this out, so here are a billion screenshots so anyone who wants to do this will have an easier time of it! One of the niceties about being able to customize your conceptual models is not having to bother the dba while they are doing important things like indexing tables and optimizing...

The first thing I wanted to look at after I downloaded the new Entity Framework Beta2 and Tools CTP was the EDM Designer. The designer is displayed as the result of opening up an EDMX file. The EDMX file is the wrapper for the three Entity Data Model files (CDSL, MSL, SSDL). Therefore, you need to create...