public static List <SPPrincipal> GetRelatedItemUsers(this SPListItem item)
{
List <SPPrincipal> arrRealtedItemUsers = new List <SPPrincipal>();
dynamic relatedItems;
try
{
relatedItems = item[SPBuiltInFieldId.RelatedItems];
if (relatedItems == null)
{
relatedItems = item[SPBuiltInFieldId.RelatedItems];
}
}
catch
{
relatedItems = null;
}
if (relatedItems == null)
{
return(arrRealtedItemUsers);
}
String relatedItemsString = relatedItems.ToString();
dynamic jsonRelatedItems = JsonConvert.DeserializeObject(relatedItemsString);
foreach (dynamic relItem in jsonRelatedItems)
{
int relatedItemId = (int)relItem["ItemId"];
string relatedlistIdString = relItem["ListId"];
Guid relatedlistId = new Guid(relatedlistIdString);
SPList relatedList = item.Web.Lists[relatedlistId];
SPListItem relatedItem;
try
{
relatedItem = relatedList.GetItemById(relatedItemId);
}
catch (Exception)
{
continue;
}
List <string> arrRelatedListUserFields = relatedList.GetListUserFields();
arrRealtedItemUsers.AddRange(relatedItem.GetUsersFromUsersFields(arrRelatedListUserFields));
}
return(arrRealtedItemUsers);
}
