Data Controls :: How To Avoid Exporting Certain Column Headers In GridView

I have boundfiled column inside gridview and made the column as invisible by setting visible="false".

But while exporting the gridview to excel I am getting the Header text alone exported. Wherever the column's visibility is set to false the header text should not be exported. After binding the gridview I have set the column's visiblity to false so it won't export the column values.

The problem is to stop exporting the header text to excel. Let's say column index is 10

public class GridViewExportUtil
{

public static void Export(string fileName, GridView gv)
{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader(
"content-disposition", string.Format("attachment; filename={0}", fileName));

[CODE]...