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Tuesday, May 27, 2008 1:38 PM

Moving On...

I have to admit publically that I’ve decided to take on new challenges unrelated to EDM and Entity Framework. Starting today I’ll be working on the lower levels of the SQL Server Connectivity stack. I’d like to thank all of you who’ve been reading my
Posted by Zlatko Michailov | 2 Comments
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Monday, May 12, 2008 11:45 AM

New version of eSqlBlast - compatible with .NET Framework 3.5 SP1 Beta

The .NET Framework SP1 Beta-compatible version of eSqlBlast is available at http://code.msdn.microsoft.com/esql/Release/ProjectReleases.aspx?ReleaseId=991 . The release includes a source code zip as well. The SP1 Beta distributions of .NET Framework 3.5
Posted by Zlatko Michailov | 1 Comments
Friday, March 14, 2008 3:20 PM

Primer to EntityConnectionStringBuilder

Following the spirit of Primer to ConnectionStringBuilder from ADO.NET 2.0, let’s see how the pattern has evolved in Entity Framework. Building an Entity Connection String from Scratch What’s important to keep in mind before we dive into code samples,
Posted by Zlatko Michailov | 1 Comments
Attachment(s): Program.cs
Friday, March 14, 2008 11:38 AM

Why Should I Use Entity Framework?

If your app is small enough, i.e. you write your own database schema (for SQL Server) and you write the only app over that schema, you don’t really need Entity Framework. In that case, you may consider LINQ to SQL. Now let’s think big. Let’s say you are
Posted by Zlatko Michailov | 2 Comments
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Wednesday, December 19, 2007 11:21 PM

The Edm.Length() Canonical Function over SqlClient

I recently blogged about canonical functions in Entity Framework and SQL Server’s LEN() function . The purpose of those two posts was to lay out the foundation for this one, and to allow it to be brief and coherent. Please read those two posts before
Posted by Zlatko Michailov | 2 Comments
Friday, December 14, 2007 2:11 PM

Entity Framework and Object/Relational Mapping

Often, people categorize Entity Framework as an Object/Relational Mapper and try to compare it to other O/R Mappers. I dare say that’s an apples-to-oranges kind of comparison. While Entity Framework does have ORM capabilities, that is only a fraction
Posted by Zlatko Michailov | 3 Comments
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Wednesday, December 12, 2007 4:38 PM

eSqlBlast – The Ultimate Tool for Writing Entity SQL Queries

2007.12.18 : Today I posted an update to How to Parse an EntityDataReader - I discovered (and fixed) two bugs in the parsing code. Since the code is taken from eSqlBlast, the same fix should be applied to it too. The code is in project Core, class XmlVisitor,
Posted by Zlatko Michailov | 1 Comments
Thursday, December 06, 2007 9:44 AM

Entity Framework Beta 3 Is Available for Download

Entity Framework Beta 3 and related packages are available for public download: · Entity Framework Runtime : http://go.microsoft.com/fwlink/?LinkId=104981 · Entity Framework Tools : http://go.microsoft.com/fwlink/?LinkId=104983 · Entity Framework Samples
Posted by Zlatko Michailov | 5 Comments
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Wednesday, December 05, 2007 5:01 PM

Entity SQL: Canonical Functions

Canonical functions were introduced in the Beta 2 release of Entity Framework. Their purpose is to expose a [virtually] canonical API beyond the core language constructs. Consumers of canonical functions should be aware that Entity Framework defines only
Posted by Zlatko Michailov | 7 Comments
Tuesday, December 04, 2007 4:26 PM

What Do ObjectQuery’s Builder Methods Build

Until Beta 2 ObjectQuery’s builder methods used to build a Command Tree. There were multiple problems with that: · Duplicate code - there is already a component that builds Command Trees from Entity SQL. · Caching – Command Trees are expensive to hash
Posted by Zlatko Michailov | 0 Comments
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Tuesday, December 04, 2007 3:51 PM

How to Get the Native SQL from an ObjectQuery

The way to get the native SQL generated for an ObjectQuery is exactly the same as for EntityCommand – using the new ToTraceString() method introduced in Beta 3. Previously that would require a similar (even more obscure) pattern that involved ObjectQuery.CreateCommandTree()
Posted by Zlatko Michailov | 2 Comments
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Tuesday, December 04, 2007 3:31 PM

How to Get the Native SQL from an EntityCommand

With the Beta 3 release, Entity Framework is introducing an easy way to get the native SQL from an EntityCommand. There was public API to get to the native SQL, but the pattern was too obscure, and I don’t want to go into detail. Let’s discuss the new
Posted by Zlatko Michailov | 4 Comments
Wednesday, November 21, 2007 1:09 PM

How to Do Custom Mapping Using Entity SQL Views

This post was intended to be a reply to this question http://forums.microsoft.com/msdn/showpost.aspx?postid=2440161&siteid=1 on the Entity Framework forum, but its size exceeds the forum server limit. Besides, it’s useful in general. So I decided
Posted by Zlatko Michailov | 1 Comments
Monday, November 19, 2007 2:08 PM

LINQ to Entities: Compiled Queries

Last Friday I blogged about making local variables behave consistently in LINQ to Entities queries . And the solution I recommended was compiled queries. But just today I realized that I haven’t blogged about compiled queries in general yet. The main
Posted by Zlatko Michailov | 3 Comments
Friday, November 16, 2007 4:21 PM

Behavior of Variables in LINQ to Entities Queries

LINQ is very nice about referencing local variables without any additional declaration. When I ran my first such LINQ to Entities query, I was ecstatic. The next moment I was puzzled – are the values of those variables picked at compile-time and later
Posted by Zlatko Michailov | 2 Comments
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