private IEnumerable GetChildSourceFromParentID(object parentID, object parentItem, bool addChildNode = true)
{
List <object> childSource = new List <object>();
var itemsSource = (IEnumerable)this.TreeGrid.ItemsSource;
var itemsCount = SourceCollection.AsQueryable().Count();
if (SelfRelationRootValue == DependencyProperty.UnsetValue && parentItem == null)
{
foreach (object item in itemsSource)
{
object childValue = propertyAccessProvider.GetValue(item, childPropertyName);
int i = 0;
foreach (object record in itemsSource)
{
object parentValue = propertyAccessProvider.GetValue(record, parentPropertyName);
if (!item.Equals(record) && ((parentValue != null && parentValue.Equals(childValue)) || parentValue == childValue))
{
break;
}
i++;
if (i == itemsCount)
{
childSource.Add(item);
}
}
}
return(childSource as IEnumerable);
}
foreach (object record in itemsSource)
{
object childValue = propertyAccessProvider.GetValue(record, childPropertyName);
if (IsEqual(parentID, childValue, parentItem == null) && record != parentItem)
{
if (!Nodes.RootNodes.sourceList.Contains(record))
{
childSource.Add(record);
}
}
if (!addChildNode && childSource.Count > 0)
{
if (CanFilter)
{
if (FilterItem(childSource.LastOrDefault()))
{
break;
}
}
else
{
break;
}
}
}
return(childSource as IEnumerable);
}