Export to Excel - Hyperlink columns

I use a lot of hyperlink columns in my EntityGridView controls.  This is a problem when users export the grid to excel.  I have modified my local copy of the ExportToExcel class to fix this, so I thought I would publish it so that someone with more experience with the template modification could possibly implement it.  I hope this helps someone else out as well.

   /// <summary>
        /// Clears the child controls of a EntityGridView to make sure all controls are LiteralControls
        /// </summary>
        /// <param name="dg">Datagrid to be cleared and verified</param>
        protected void ClearChildControls(System.Web.UI.WebControls.GridView dg)
        {

            for (int i = dg.Columns.Count - 1; i >= 0; i--)
            {
                if (dg.Columns.GetType().Name == "ButtonColumn"
                    || dg.Columns.GetType().Name == "CheckBoxField"
                    || dg.Columns.GetType().Name == "CommandField")
                {
                    dg.Columns.Visible = false;
                }
            }

            // Remove hyperlinks from the grid
            foreach (GridViewRow row in dg.Rows)
            {
                foreach (TableCell cell in row.Cells)
                {
                    if (cell.Text == "")
                    {
                        if (cell.Controls.Count > 0)
                        {
                            HyperLink lnk = (HyperLink)cell.Controls[0];

                            if (lnk != null)
                            {
                                cell.Text = lnk.Text;
                                cell.Controls.Clear();
                            }
                        }
                    }
                }
            }

            this.RecursiveClear(dg);
        }
    }