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Can I use LINQ with lists in sharepoint online? If so, can someone provide me with an example?

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2 Answers

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Yes, you can use it in SharePoint online

SharePoint 2010 includes the LINQ to SharePoint provider, which translates LINQ statements to CAML queries. LINQ is a standard query language and, when applied to SharePoint, it enables developers to query SharePoint lists without requiring them to learn the CAML syntax that is used internally by SharePoint.

Source: http://www.microsoft.com/download/en/details.aspx?id=17069

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Yes, I've read the developer guide. I also tried spmetal, but as expected it did not work. I can't figure out how to write the query. Can you provide me with an example? – Morten Feb 2 '12 at 9:13
Here is an example from the ms forums: social.technet.microsoft.com/Forums/en-US/… – Anders Aune Feb 3 '12 at 11:02
Thanks a lot, to the both of you. So far, I have tried the following: Create a site locally in my sharepoint 2010 developement environment. Use SPMetal to generate the entities from the lists. Export the lists and the webpart to my sharepoint online site. I was able to get it up and running, but I had to change something in my javascript. After deploying the webpart for the second time, I got the errormessage about running in a sandboxed solution – Morten Feb 6 '12 at 10:55
Could you post the error log/message in your above post? – Falak Mahmood Feb 6 '12 at 11:31
FreeStyler, there's not alot of details in the errormessage, I forgot it and have been unable to reproduce. Anyway, I managed to run my webpart now. As mentioned, I used SPMetal to generate entities from the list in my local sharepoint developement environment. I then created the same lists in sharepoint online in a new site, and added the visual webpart solution to sharepoint online. I was hoping I could just export my local site as a solution (with webpart included), and import it into my sharepoint online site. But all attempts have failed, giving me a varierity of errormessages. – Morten Feb 6 '12 at 14:19
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Yes, We can use LINQ in SharePoint Online. I used it in a Visual web part which stores the information from the form to the list. Here are the steps to follow:

  1. Create a ListContext File with the help of SPMetal

  2. Now use the ListCotext file as the entity layer for the data saving and modification functionality

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