SharePoint Metadata field. Part 2: Custom Filter.aspx page

Part 1 - Web Services in DisplayPattern.

Displaying of field values in RenderPattern named HeaderPattern (displaying filtered values in a field header, to be more exact) is the second important point which is worth attention by SharePoint custom field types development.

In this field type pattern CAML markup is practically the same as HeaderPattern in Lookup field type with the exception of the first string which is given in Part 1. The changes will affect the   /_layouts/Filter.aspx page which is called by clicking on the field header.

If we have a look at the result of a query made after customization which is given in Part 1 we will be disappointed:

SharePoint Metadata field. Part 1: Web Services in DisplayPattern

Once I was faced with the necessity of storing data of lists in… lists.

The first idea was to use standard set of SharePoint data types but I had to refuse it because it wasn’t a proper decision for solving such problems.