void NamedItemList_AfterSet(object sender, SetEventArgs <T> e)
{
if (_NameDict.ContainsKey(e.OldItem.Name))
{
_NameDict.Remove(e.OldItem.Name);
}
;
_NameDict.Add(e.NewItem.Name, e.NewItem);
e.OldItem.BeforeNameChange -= new EventHandler <NameChangeEventArgs>(Item_BeforeNameChange);
e.OldItem.AfterNameChanged -= new EventHandler <NameChangeEventArgs>(Item_AfterNameChanged);
e.NewItem.BeforeNameChange += new EventHandler <NameChangeEventArgs>(Item_BeforeNameChange);
e.NewItem.AfterNameChanged += new EventHandler <NameChangeEventArgs>(Item_AfterNameChanged);
}
void NamedItemList_BeforeSet(object sender, SetEventArgs <T> e)
{
if (!EqualityComparer <T> .Default.Equals(e.NewItem, e.OldItem))
{
if (!_NameDict.ContainsKey(e.NewItem.Name))
{
//Name of the new item does not exist.
}
else if (_NameDict.ContainsKey(e.NewItem.Name) && EqualityComparer <T> .Default.Equals(e.OldItem, _NameDict[e.NewItem.Name]))
{
//Name does exist, but its the name of the old item.
}
else
{
throw new ArgumentException("Cant set the INamedItem. The name {0} does already exist in the collection.".Build(e.NewItem.Name));
}
}
}
