Update Property Promotion Column Value in InfoPath Document Library

Question

Hello All,
I just tried to update a property promotion value using this code:
using (SPSite site = new SPSite(webName))
                    using (SPWeb objweb = site.OpenWeb())
                        SPList spList = objweb.Lists["XYZ"];
                        SPQuery qry = new SPQuery();
                        qry.Query = @"<Where>" +
                      "<Eq>" +
                      "<FieldRef Name='ServiceR' /><Value Type='WorkflowStatus'>17</Value>" +
                      "</Eq>" +
                      "</Where>";
                        qry.ViewFields = @"<FieldRef Name='Title' /><FieldRef Name='Evaluation_x0020_Status' />";
                        SPListItemCollection listItems = spList.GetItems(qry);
                        objweb.AllowUnsafeUpdates = true;
                        if (listItems.Count > 0)
                            foreach (SPListItem item in listItems)
                                if (item["Evaluation_x0020_Status"] == null)
                                    item["Evaluation_x0020_Status"] = "Evaluation Completed";
                                    item.Update();
                        objweb.AllowUnsafeUpdates = true;
The code exexuted but the value does not updated !!
Any Answer ?

Answer 1

I resolve the issue using this link:
http://nanettevb.blogspot.com/2011/03/cannot-update-promoted-fields-from.html
Omar Attari