public void Execute()
        {
            try
            {
                Guid   loanServiceId = Guid.Empty;
                string eventType     = String.Empty;
                Int64  eventId       = 0;

                if (InputParameters.ContainsKey("LoanServiceId"))
                {
                    Guid.TryParse(InputParameters["LoanServiceId"].ToString(), out loanServiceId);
                }

                if (InputParameters.ContainsKey("EventType"))
                {
                    eventType = InputParameters["EventType"].ToString();
                }

                if (InputParameters.ContainsKey("EventId"))
                {
                    Int64.TryParse(InputParameters["EventId"].ToString(), out eventId);
                }

                LoanServiceContract loanServContract = null;

                if ((_httpContext != null) && (_httpContext.Session[SessionHelper.LoanServiceList] != null))
                {
                    List <LoanServiceContract> loanServiceList = null;
                    loanServiceList  = new List <LoanServiceContract>().FromXml(_httpContext.Session[SessionHelper.LoanServiceList].ToString());
                    loanServContract = loanServiceList.FirstOrDefault(x => x.LoanServiceId == loanServiceId);
                }
                else
                {
                    loanServContract = LoanServiceFacade.RetrieveLoanService(loanServiceId);
                }

                LoanServiceDocumentDownload model = new LoanServiceDocumentDownload();
                if (eventId != 0)
                {
                    LoanServiceEventsContract loanServEventContract = loanServContract.LoanServiceEventsList.FirstOrDefault(x => x.EventId == eventId && x.EventType.ToLower() == eventType.ToLower());
                    model.LoanServiceEventsList = new List <LoanServiceEventsContract>();
                    model.LoanServiceEventsList.Add(loanServEventContract);
                }
                else
                {
                    model.LoanServiceEventsList = loanServContract.LoanServiceEventsList;
                }

                _viewName  = "Log/_loanServiceDocumentDownload";
                _viewModel = model;
            }
            catch (Exception ex)
            {
                TraceHelper.Error(TraceCategory.LoanCenter, "There is some issues in method OpenLoanServiceDownloadPopupCommand.Execute(): " + ex.Message, ex);
                throw;
            }
        }