Question

i have a query like below and i want to update all elements of sequence. but without using foreach/for

var res = _context.tbl1.Where(/* Conditions here */);
res.//Using a method to performing changes;

Answer 1

If you’re asking whether you can do set based updates in linq-to-sql as you can in sql, i’m afraid you can’t. You either have to individually update each l2s object and call SubmitChanges() when you’re done, or call ExecuteCommand() with your sql query.

Here’s a thread you might be interested in –
http://social.msdn.microsoft.com/Forums/en-US/linqprojectgeneral/thread/0f014318-5259-43c7-8518-06948cec465e

Edit: Actually, this may be of interest to you –
Updating multiple rows Linq vs SQL

If you have a look there’s a link to here – http://www.aneyfamily.com/terryandann/post/2008/04/Batch-Updates-and-Deletes-with-LINQ-to-SQL.aspx which looks kinda cool. Might have to check it out myself!