public FiltratorRequestListMass(RequestMassViewModel _model)
 {
     if (_model == null)
     {
         throw new Exception("Неопределены все обязательные параметры");
     }
     ssContext = new ScanStoreContext();
     //resultContractsList = null;
     model           = _model;
     RequestsList    = ssContext.ContractRequess.AsNoTracking().AsQueryable <ContractRequess>();
     sortRequestList = new List <ContractRequess>();
 }