gridview选中行标注颜色

    //选中行标注颜色
            foreach (GridViewRow gvr1 in gv_Contract.Rows)
            {
                gvr1.BackColor = System.Drawing.Color.Empty;//没有颜色，透明
            }
            gvr.BackColor = (System.Drawing.Color)(new System.Drawing.ColorConverter()).ConvertFromString("#669999");



年龄：

  if (comm.IsDate(ds.Tables[0].Rows[0]["Birthday"].ToString()))
                {
                    TimeSpan dt = DateTime.Now - DateTime.Parse(ds.Tables[0].Rows[0]["Birthday"].ToString());
                    decimal age = (dt.Days / 365);
                    ds.Tables[0].Rows[0]["age"] = age;
                }