How to set a lookup field by c# code

Question

I have a list in SharePoint and it contains a lookup field. Now I want to insert an item to this list, but don't know how to work with the lookup field. I tried the following code but no item is added.

SPFieldLookupValue gov = new SPFieldLookupValue(gv.SelectedValue);
items["gov_name"] = gov.LookupValue;
items.Update();

I thought my question is very easy but it's important for me :( — NOOR, Apr 13 '13 at 20:04
I have edited your question (changed formatting). Please, approve this edit. It will help others in future. — MikhailSP, Apr 13 '13 at 20:56
Check this Get and Set a SharePoint Lookup Field Values Using SSOM C# — Mohamed El-Qassas MVP, Oct 22 '17 at 09:34

score 6 · Accepted Answer · edited Apr 13 '17 at 12:41

6

Please, take a look at this question. So you can do something like this:

SPListItem lookedUpItem =  GetItemSomeHow();
newItem[lookupField] = new SPFieldLookupValue( lookedUpItem.ID, lookedUpItem.Title);
newItem.Update();

Hope it helps. If so, please, don't forget to press upvote and mark as answer. :)

edited Apr 13 '17 at 12:41

Community

1

answered Apr 13 '13 at 20:12

MikhailSP

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Thanks for reply but What's getitemsomehow ?? – NOOR Apr 13 '13 at 20:33
this means that you need to obtain an SPListItem object you want to lookup to. For instance it could look like: SPListItem lookedUpItem=web.Lists["SomeList"].Items[1] for the item with ID=1 in the list "SomeList"; – MikhailSP Apr 13 '13 at 20:40

How to set a lookup field by c# code

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