Change GridView cell Background Color based on condition in ASP.Net

I have tried following this article but doesnt not work for me. In my situation i have gridview with few hiddenfields. One of which has the value of either Y or N. I would like to change background for the record that has value of Y.

I was trying the following:

        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //((HiddenField)getItemDesc.SelectedRow.Cells[1].FindControl("HiddenFieldID")).Value;
            var status = char.Parse(e.Row.Cells[22].Text);

            foreach (TableCell cell in e.Row.Cells)
            {
                if (status == 'Y')
                {
                    cell.BackColor = Color.Yellow;
                }
            }
        }

I get the following error:

String must be exactly one character long. 

Please help. All im trying to do is get value from hiddenfield and change color.

Thank You