查阅项的赋值和查看

赋值：
SPFieldLookupValueCollection lookupItems = new SPFieldLookupValueCollection();

 foreach (Hobby hobby in hobbies)
 {
        SPFieldLookupValue lookupItem = new SPFieldLookupValue(hobby.Id,hobby.Hob);
         lookupItems.Add(lookupItem);
 }

item["hobby"] = lookupItems;
查看：
 SPFieldLookupValueCollection lookupItems = new SPFieldLookupValueCollection(item["hobby"].ToString());
foreach (SPFieldLookupValue lookupItem in lookupItems)
 {
        student.Hobby += lookupItem.LookupValue + ";";
}