I am currently building a filtering mechanism for a gridview. I am binding the gridview to an SQLDataSource. My user will select a column name from a dropdown list (populated at page load from gridview.columns(i).HeaderText values) and enter a search value in a textbox. What I want to do at this point is to determine programmatically what data field is associated with the select column HeaderText value. What I need to locate is the DataField value associated with the column. Can you help?