private static void ClearOld(LinkedLookupSettings config, int listItemId, List<int> removeItems, SPField remoteLookup, SPList remoteList)
{
foreach (int id in removeItems)
{
SPListItem remoteItem;
try
{
remoteItem = remoteList.GetItemById(id);
}
catch
{
continue;
}
// pokusit se z lookupu v remoteItemu smazat polozku, na ktere aktualne bezi receiver
// pokud je to multilookup, chceme si zachovat zbytek hodnot
if (( (SPFieldLookup) remoteLookup ).AllowMultipleValues && ( remoteItem[remoteLookup.InternalName] ?? "" ).ToString().Trim() != "")
{
// stavajici obsah lookupu
SPFieldLookupValueCollection existingCollection = new SPFieldLookupValueCollection(( remoteItem[remoteLookup.InternalName] ?? "" ).ToString());
SPFieldLookupValue toRemove = existingCollection.FirstOrDefault(lookup => lookup.LookupId == listItemId);
// ze stavajiciho obsahu odstranime polozku, na ktere bezi receiver
if (toRemove != null) existingCollection.Remove(toRemove);
// upraveny obsah vratime zpatky
remoteItem[remoteLookup.InternalName] = existingCollection;
}
// pokud je to jednoduchy lookup, a neni prazdny, proste tam nastavime aktualni polozku
else if (( remoteItem[remoteLookup.InternalName] ?? "" ).ToString().Trim() != "")
{
SPFieldLookupValue existingVal = new SPFieldLookupValue(( remoteItem[remoteLookup.InternalName] ?? "" ).ToString());
if (existingVal.LookupId == listItemId)
{
remoteItem[remoteLookup.InternalName] = null;
}
}
if (config.RegularUpdate)
{
remoteItem.Update(false);
}
else
{
// pokud jsou receivery na obou stranach, nechceme se dostat do smycky
remoteItem.SystemUpdate(config.UpdateVersion, false);
}
}
}
private static void AddNew(LinkedLookupSettings config, SPItemEventProperties props, List<int> addItems, SPField remoteLookup, SPList remoteList)
{
foreach (int id in addItems)
{
// najit odpovidajici remote listitem
SPListItem remoteItem;
try
{
remoteItem = remoteList.GetItemById(id);
}
catch
{
continue;
}
// do kazde z nich pridal lookup na nasi polozku
// pokud je remoteLookup multilookup, overime, ze tam jeste neni, a pridame ke stavajicim
if (( (SPFieldLookup) remoteLookup ).AllowMultipleValues)
{
SPFieldLookupValueCollection existingCollection = ( remoteItem[remoteLookup.InternalName] ?? "" ).ToString().Trim() != "" ?
new SPFieldLookupValueCollection(remoteItem[remoteLookup.InternalName].ToString()) :
new SPFieldLookupValueCollection();
// zkontrolovat, jestli už tam dané ID není, ale ID, ktere menime!!!!
bool exists = existingCollection.Any(lookupVal => lookupVal.LookupId == props.ListItemId);
if (!exists)
{
existingCollection.Add(new SPFieldLookupValue(props.ListItemId,
( props.AfterProperties[( (SPFieldLookup) remoteLookup ).LookupField] ??
props.ListItem[( (SPFieldLookup) remoteLookup ).LookupField] ).ToString()));
remoteItem[remoteLookup.InternalName] = existingCollection;
}
}
// pokud je to single lookup, proste to tam pridame
else
{
if (props.AfterProperties[( (SPFieldLookup) remoteLookup ).LookupField] != null)
{
SPFieldLookupValue newVal = new SPFieldLookupValue(props.ListItemId,
props.AfterProperties[( (SPFieldLookup) remoteLookup ).LookupField].ToString());
remoteItem[remoteLookup.InternalName] = newVal;
}
else
{
SPFieldLookupValue newVal = new SPFieldLookupValue(props.ListItemId,
props.ListItem[( (SPFieldLookup) remoteLookup ).LookupField].ToString());
remoteItem[remoteLookup.InternalName] = newVal;
}
}
if (config.RegularUpdate)
{
remoteItem.Update(false);
}
else
{
// pokud jsou receivery na obou stranach, nechceme se dostat do smycky
remoteItem.SystemUpdate(config.UpdateVersion, false);
}
}
}
