CODEWITHSUNDEEP
c#sharepointsharepoint-onlinecsomsharepoint-api
Randy Slavey
Randy Slavey

Reputation: 564

Add multiple users to SharePoint Online document library item "Person or Group" column using Client Side Object Model (CSOM)

I am attempting to add multiple users to a field using CSOM. However, only one person is being added even though both have been validated.

var newUserField = new List<SP.FieldUserValue>();
newUserField.Add(new FieldUserValue { LookupId = 14 });
newUserField.Add(new FieldUserValue { LookupId = 11 });
newListItem["MultiUserField"] = newUserField;
newListItem.Update();
ctx.ExecuteQuery();

That code always only adds user 14. I have also tried:

newListItem["MultiUserField"] = newUserField.ToArray();

Every reference I have seen says this should work, and it's not throwing any errors.

I have also verified the column allows multiple entries, and have added both users manually as a test. Could this be a document library CSOM limitation? Most references I have seen are using a list.

Upvotes: 0

Views: 2285

Answers (1)

Randy Slavey
Randy Slavey

Reputation: 564

It turns out, during validating my users, I was calling a

ctx.ExecuteQuery();

that was wiping out what I had saved for the user. Validating the users first and storing their IDs in a list and then updating the item worked.

Upvotes: 1

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