public ActionResult Approve(SlsCorporateSalesApproval obj, string newComment)
 {
     //According to DB column description: 1=New,2=Approve,3=Pass,4=Reject
     return UpdateSalesOrderApproval(obj, 2, newComment);
 }
        public ActionResult UpdateSalesOrderApproval(SlsCorporateSalesApproval obj, int action, string newComment)
        {
            int userId = Convert.ToInt32(Session["userId"]);
            Operation objOperation = new Operation { Success = false };

            if (ModelState.IsValid)
            {
                if (obj.Id == 0)
                {
                    if ((bool)Session["Add"])
                    {
                        //Sales Order Approval is created internally during sales order creation.
                        objOperation.Success = false;
                    }
                    else { objOperation.OperationId = -1; }

                }
                else
                {
                    if ((bool)Session["Edit"])
                    {
                        //According to DB column description: 1=New,2=Approve,3=Pass,4=Reject
                        obj.Event = action;
                        obj.ModifiedBy = userId;
                        obj.ModifiedDate = DateTime.Now.Date;
                        objOperation = _approvalController.UpdateApproval(obj, newComment);
                    }
                    else { objOperation.OperationId = -2; }
                }
            }
            return Json(objOperation, JsonRequestBehavior.DenyGet);
        }