Filter a gridview with a rowfilter using two textboxes each looking up in two columns from a table

I have a search form with a ID-textbox and fname-textbox and a gridview. what i want is when i type an id in the ID-textbox and a name in the fname-textbox the gridview is filtered according to the row with that both that id and name respectively.

I am using visual studio 2005 c#, winforms.

thank you