public static string VahedSodoor(this string idVahed)
        {
            CheckOutRequestBusiness reqBusiness = new CheckOutRequestBusiness();

            if (!string.IsNullOrEmpty(idVahed))
            {
                var dt = reqBusiness.GetNameOfVahedByVahedID(Convert.ToInt32(idVahed));
                if (dt.Rows.Count > 0)
                {
                    if (dt.Rows[0]["vahed"].ToString() != "Null")
                    {
                        return(dt.Rows[0]["vahed"].ToString());
                    }
                }
            }

            return("--");
        }