I have tried with 

```
protected void gridCustomer_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (e.Row.RowType == DataControlRowType.DataRow)
   {
      DateTime olddate = Convert.ToDateTime(e.Row.Cells[9].Text);
      // Error : String was not recognized as a valid DateTime./ 'DateTime today = DateTime.Now;'
      if (olddate > today)
      {
          Label status = (Label) e.Row.FindControl("lblStatus");
          status.Text = "AutoHold";
      }
   }
}

```