LINQ in Action - THE LINQ book

March 2006 - Posts

• FooLinq

  So we've had long discussions about Linq, XLinq, and particularly DLinq. It's probably a good exercise to forget about databases, ORMs, and XML files, and spur the masses into thinking where else they think Linq would be useful. Maybe someone here will take up one of the suggestions as a project... Read More... Posted Friday, March 31, 2006 8:33 PM from MSDN Forums: LINQ Project General | (Comments Off)

• Is anyone working on an Oracle plugin for DLinq?

  I'd like to use DLinq on Oracle, but there is only support for SQL Server now. Is anyone currently working on an Oracle plugin for DLinq? Thanks! Read More... Posted Wednesday, March 29, 2006 9:21 PM from MSDN Forums: LINQ Project General | (Comments Off)

• Do you do SOA?

  OK, the title is buzzwordy and doesn't mean much but here is the question I want to pose as we evaluate the relative priorities of various multi-tier scenarios in DLinq. Do you use the same type on mid-tier and on presentation / web-service client tier? I have seen many discussions about how some people want to use the same assemblies on mid-tier and presentation tier (or even on web-service clients). I personally think that the two should be designed separately and should not be the same unless Read More... Posted Sunday, March 26, 2006 2:05 PM from Dinesh's Cyberstation | (Comments Off) Filed under: LINQ, Data Access

• Should DLinq support a read-only stream of objects?

  Currently, when DLinq retrieves entities, it automatically inserts them in an identity cache. This ensures that if you run two queries whose results overlap, you get the same objects by reference - not copies. The object reference after all is the identity in CLR world. This ensures that when you change an entity, you don't need to worry about which copy you are changing - there is only one. So update anomalies can be avoided. This comes at some minimal cost - hashing the object ref and maintaining Read More... Posted Sunday, March 26, 2006 1:53 PM from Dinesh's Cyberstation | (Comments Off) Filed under: LINQ, Data Access

• Chat transcripts

  I got a couple of emails and a question on my blog about chat transcripts. DLinq transcripts may be a bit tricky to find since they are filed under Visual Studio rather than .NET Framework. It takes 2-3 weeks to get the transcripts up so the latest one won't show up for a while. See http://msdn.microsoft.com/chats/transcripts/vstudio/default.aspx for some of the recent C#, VB and DLinq chat transcripts. Read More... Posted Sunday, March 26, 2006 1:48 PM from Dinesh's Cyberstation | (Comments Off) Filed under: LINQ, Data Access

• DLinq chat today (3/23/06) at 1pm Pacific Time

  The DLinq team is looking forward to your questions and comments today at 1pm Pacific Time in this chatroom: http://msdn.microsoft.com/chats/chatroom.aspx The official chat schedule entry . Add a reminder to your calendar . The chatroom itself . All upcoming developer chats . Have some time zone questions ? Read More... Posted Thursday, March 23, 2006 10:32 AM from Dinesh's Cyberstation | (Comments Off) Filed under: LINQ, Data Access

• MSDN Chat: DLinq, May 18th @ 12:45pm Pacific Time

  Show up and tell us what's on your mind! People from the C# and DLinq teams will be there to listen. We're still in the planning and development stage, so rest assured - we can react to your feedback. The official chat schedule entry . Add a reminder to your calendar. The chatroom itself . All upcoming developer chats . Have some time zone questions? Check chats category on my blog for the next C# chat. See you there! Scott Nonnenberg Read More... Posted Sunday, March 19, 2006 11:03 PM from MSDN Forums: LINQ Project General | (Comments Off)

• help

  From the video I have watched http://download.microsoft.com/download/4/7/0/4703eba2-78c4-4b09-8912-69f6c38d3a56/Dlinq.wmv I did not understand .how can i use my database like northwind i have watched ready-made northwind.cs how can i make database file like northwind.cs and i have watched command prompt and executed sqlmetal.exe what is that command work Read More... Posted Sunday, March 19, 2006 2:17 AM from MSDN Forums: LINQ Project General | (Comments Off)

• DLinq: What's cooking in the kitchen

  OK, after hibernating in the winter, I am back on the blog. Some of you joined us on DLinq chat last week so you already have a sense of what is going on. For others, here is a peek at what we are working on: Inheritance: table-per-hierarchy: It turns out that this feature is more interesting in the LINQ context than in a traditional ORM sense (e.g. ObjectSpaces). Languages like C# and VB provide you a variety of ways to work with types and they all show up in DLinq queries. Take for example C# operators Read More... Posted Thursday, March 16, 2006 7:24 AM from Dinesh's Cyberstation | (Comments Off) Filed under: LINQ, Data Access

• Indexed Linq

  Brian Beckman shows off a simple hash join in LINQ , using VB9. The performace boosts reinforce some work my partner and I did, experimenting with load-time generated indexes over collections. There was a significant hit incurred when creating the index, but it was assumed that you wouldn't bother unless it actually did any good. The code below is somewhat naive, but shows one approach. In this case, the index tracks several different features of a number, even/odd, positive/negative, and the values Read More... Posted Wednesday, March 15, 2006 11:35 PM from The Great Linq | (Comments Off)

• ChemLinq

  A customer posed a good question to me the other day: outside of relational databases, what good is LINQ ? As an example, he suggested a chemistry drawing application. I couldn't help him directly on the GUI aspects, but I decided to figure out, given a graph of atoms and bonds representing a molecule, how to find patterns in the structure. In the specific example, I decided to locate hydroxyl ions (-OH). The query boils down to this: find the hydrogen atoms with a single bond, which goes to an oxygen Read More... Posted Wednesday, March 15, 2006 12:31 AM from The Great Linq | (Comments Off)