[2005] Query on DataGridView using XML

Hi ,

i'am new to XML to Database as i see most of people do Write Data to XML
but i want to manipulate from xml to data

so i have a valid xml filled by data ,
& i have a DataGridView filled by this data coming from the xml file
so i want to do query to this datagridview which mean
the datagridview show all data at first load
ket's say we have customer city & customer name as field
i want to do a query to show only the customer from a special city & then show new result on DataGridView

hope the question is clear

Thanks ;)