gridview中某列值小於一定數量時字體爲紅色

         protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                if (Convert.ToInt32(e.Row.Cells[6].Text < 30))
                    //找到庫存的索引，設定數量小於30時變顏色
                {
                    e.Row.Cells[6].BackColor = System.Drawing.Color.Red;
                    //設計顏色變化爲紅色
                }
            }
        }