[Error]

I get the following error having the main folder at level/depth 3, and creating a new item.
( only when creating new items the error occurs )

" DateFolders SortChildrenByDateProperty exception "

The exeption is just a side effect btw. 

[Structure]
1. site
   2. home
   2. page
     3. Datefolder main
        4.  month
            5.  year
                6. items
   2. page

[Structure adding item]

1. site
   2. home
   2. page
     3. Datefolder main
        4.  month
            5.  year
                6. items
   2. year
      3. month
         4. year
            5.  month 
                6.  new added item
  2. page

[ Quick fix ]

Check in the Document_AfterSave if the parents are correct. After save is not needed on new items :)

====


The Document_New handler works fine. But the Document_AfterSave handler is creating the error.

I saw that the parentId was wrong so i added a check 

void Document_AfterSave(Document doc, SaveEventArgs e)
{

...
...

Document parent, monthFolder, yearFolder, monthDoc = null, yearDoc = null;

monthFolder = new Document(doc.ParentId);
yearFolder = new Document(monthFolder.ParentId);
parent = new Document(yearFolder.ParentId);

// >> check if the monthfolder is of the datefolder type. If not, stop 
if( !_dateFolderDocType.Equals( monthFolder.ContentType.Alias ) 
   || !_dateFolderDocType.Equals( yearFolder.ContentType.Alias )  ) return;

...
...

}