How to reference a column by name when iterating through a GridView ?

If I am iterating through rows in Grid View is their a way to reference the column by it's actual name?
I can do so in my RowDataBound event(See below). But I don't know how to do it when iterating through GridView.Rows.
Can someone show me how?

foreach(GridView row in grdView.Rows)
{

   string firstCol = row.Cells[0].Text; // How to reference by the column name instead of Zero?
   string SecondCol = row.Cells[1].Text; // How to reference by the column name instead of One?

}






protected void grdView_RowDataBound(Object sender, GridViewROwEventArgs e)
{

   var data = e.Row.DataItem as DataRowView;
   string custId = e.Row.Cells[data.Row.Table.Columns["CUST_ID"].Ordinal.Text;

}