Updating with linq

04-Jun-2016 16:40 by 2 Comments

Updating with linq - cerca dating cc

In addition to this overhead, Jeffery did not like the need to call Submit Changes() on the Data Context object to confirm database changes.Now I whole heartedly agree about combining simple DELETE SQL statements into one, but I actually disagree with the desire to eliminate the call to Submit Changes(). In a LINQ to SQL utopian world, executing the C# code above, the provider would generate So how can we do this?

binary data, or Post Content in this case) and how many rows the LINQ query returned.One of the shortcomings of Jeffrey’s code (self admittedly) was that he was essentially generating the SQL statement himself by using an Expression Visitor and took LINQ to SQL provider ‘out of the loop’. Length SQL statement generation to append on to whatever LINQ to SQL gives us.Because of this, he did not support all the functionality that LINQ to SQL provided (i.e. This keeps all the ‘complicated’ stuff where it belongs: in Microsoft libraries.In Jeffrey’s article, he gave an example of ‘deleting all rows where creation date was older than a month’.This is a perfect example of when a O/R Mapping framework issues multiple delete statements when a single ‘simple’ SQL statement could be written.Then, LINQ to SQL iterates all rows return, flags them as deleted, then generates a single DELETE statement.

This DELETE statement creates a simple WHERE clause using the row’s primary key (Post ID in my case).Since I recently converted my site to blogengine.net, I’ll use its database schema for all examples to follow.In addition to this, all code snippets you’ll see were run in LINQPad, which at the moment is by far my favorite development tool that I’m using (now if they’d only get intellisense in there, I’d play with this program all day long). Now you can ask questions directly to me on my new site ASPForums. Net Question Answer site, specially started to allow visitors of this site ask their doubts and queries. Just click the Ask Now button and ask your question now.He states the fact that a SQL statement for row flagged as update/delete in the entity set is created.

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