Cascading drop-down menus in a document library. SharePoint 2010 does not support this by default but you can work around this by using JQuery.


I used the following solution. However, one of the problems I encountered was that datasheet view does not present the values properly. If you try to edit the metadata using datasheet view, the filter will not apply to the sub-category column and you will get a list of all sub categories.

The steps of the solution presented are basically:

  1. Create a list for the parent category.
  2. Create a list for the sub category.
  3. Create the required columns in the list you wish to implement cascading drop downs.
  4. Edit the EditForm.aspx and insert javascript.
Actual code and instructions can be found here: