Hello Rich,
Thank you for writing.
Find attached a sample video (2013-02-21_1615), where you could see
RadGridView Filter Dialog tool for a certain column, which implements a similar to the WPF DataFilter tool functionality.
Also, you can use the
CompositeFilterDescriptor object, If you want to filter a single data field by multiple values. It contains a collection of filter descriptors objects and the logical operator for that filters. Please navigate through our documentation article about setting filters programmatically (composite descriptors), where you can find a sample code snippets:
http://www.telerik.com/help/winforms/gridview-filtering-setting-filters-programmatically-composite-descriptors.html.
If you have any questions, do not hesitate to contact us.
Regards,
Plamen
the Telerik team