Can I do exact text filtering in grid component

I have a grid with a column that has two values - Read & Unread - and have set the column header to do filtering via #select_filter

It creates the filter options correctly (Blank, Read & Unread) but when I select Read, it still displays the Unread items. I assume this is due to it doing a contains based search rather than exact match - is it possible to set the filtering to be exact value tests?



Example XML is:



    

        …/dhtmlx/imgs/

        true

        false

        ,#select_filter,#select_filter,#select_filter

        

        light

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]]>    09/12/08    0000310    Sent    This is message: 0    Read    

    

    

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]]>    09/12/08    0000310    Received    This is message: 1    Unread    

    

is it possible to set the filtering to be exact value tests?
yes it possible, just use #select_filter_strict instead of #select_filter