C# convert Microsoft.Sharepoint.Client.FieldUserValue to Microsoft.Sharepoint.Cliend.User

Question

Ok i am using a Caml Query to retrieve a item from a sharepoint list. I get the item loop through the field values to the one i want. My problem is i need to convert that which is a FieldUserValue Datatype to a normal User datatype. There is a method to retrieve FieldUserValue from User but not the other way around...

 User Usr;


        foreach (ListItem item in items)
        {
            foreach (var f in item.FieldValues)
            {
                if (f.Key == "ColumnTitleofDataTypePersonorGroup")
                {
                    //Error Message
                    Usr = f.Value;
                }
            }

        }

The Detailed ErrorMessages says Error 2 Cannot implicitly convert type 'object' to 'Microsoft.SharePoint.Client.User'. An explicit conversion exists (are you missing a cast?)
I think I am just missing something obvious.. Thanks for any help in advance..

Answer 1

The following example demonstrates how to get User object from FieldUserValue object:

var list = ctx.Web.Lists.GetByTitle(listTitle);
var item = list.GetItemById(itemId);
ctx.Load(item);
ctx.ExecuteQuery();

var author = (Microsoft.SharePoint.Client.FieldUserValue) item["Author"];
var authorUser = ctx.Web.SiteUsers.GetById(author.LookupId);
ctx.Load(authorUser);
ctx.ExecuteQuery();