Update only records from defaultview rowfilter result

Dear Team ,

I have 10 rows in a datatable, and display using the datagridview.

I have used DefaultView.RowFilter to filter base on user input and the datagridview shown the filter result.

My question is, how do I update the a particular column on the filtered result.

If I loop the datatable and update the column, the changes is apply to all the rows instead of the filtered rows.

Hope someone could give some clues.