BExIS.Dcm.ImportMetadataStructureWizard.ImportMetadataStructureTaskManager.GoToNext C# (CSharp) Method

        public void GoToNext()
        {
            //this.currentStepInfo.SetStatus(StepStatus.success);
            StepInfo temp = this.currentStepInfo;
            this.currentStepInfo = this.Next();
        }

        public ActionResult SetParameters(int? index, string name = null)
        {
            TaskManager = (ImportMetadataStructureTaskManager)Session["TaskManager"];

            ParametersModel model = new ParametersModel();
            model.StepInfo = TaskManager.Current();

            if (TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.TITLE_NODE)
                && TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.DESCRIPTION_NODE)
                && TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.ENTITY_TYPE_NODE))
            {
                long id = Convert.ToInt64((TaskManager.Bus[ImportMetadataStructureTaskManager.METADATASTRUCTURE_ID]));

                string mappingFilePathImport = TaskManager.Bus[ImportMetadataStructureTaskManager.MAPPING_FILE_NAME_IMPORT].ToString();
                string mappingFilePathExport = TaskManager.Bus[ImportMetadataStructureTaskManager.MAPPING_FILE_NAME_EXPORT].ToString();
                string titleXpath = TaskManager.Bus[ImportMetadataStructureTaskManager.TITLE_NODE].ToString();
                string descriptionXpath = TaskManager.Bus[ImportMetadataStructureTaskManager.DESCRIPTION_NODE].ToString();
                string entity = TaskManager.Bus[ImportMetadataStructureTaskManager.ENTITY_TYPE_NODE].ToString();
                model.TitleNode = GetMetadataNodes().First(p => p.XPath.Equals(titleXpath)).DisplayName;
                model.DescriptionNode = GetMetadataNodes().First(p => p.XPath.Equals(descriptionXpath)).DisplayName;
                model.EntityType = TaskManager.Bus[ImportMetadataStructureTaskManager.ENTITY_TYPE_NODE].ToString();

                TaskManager.Current().SetValid(true);

                try
                {
                    StoreParametersToMetadataStruture(id, titleXpath,  descriptionXpath, entity, mappingFilePathImport, mappingFilePathExport);
                }
                catch (Exception ex)
                {
                    TaskManager.Current().SetValid(false);
                    ModelState.AddModelError("", ex.Message);
                }
            }
            else
            {
                //set existing parameter
                if (TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.TITLE_NODE))
                    model.TitleNode = GetMetadataNodes().First(p => p.XPath.Equals(TaskManager.Bus[ImportMetadataStructureTaskManager.TITLE_NODE].ToString())).DisplayName; ;
                if (TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.DESCRIPTION_NODE))
                    model.DescriptionNode = GetMetadataNodes().First(p => p.XPath.Equals(TaskManager.Bus[ImportMetadataStructureTaskManager.DESCRIPTION_NODE].ToString())).DisplayName; ;

                TaskManager.Current().SetValid(false);
                ModelState.AddModelError("", "Please select the missing field");
            }

            if (TaskManager.Current().IsValid())
            {
                TaskManager.Current().SetStatus(StepStatus.success);
                TaskManager.AddExecutedStep(TaskManager.Current());
                TaskManager.GoToNext();
                Session["TaskManager"] = TaskManager;
                ActionInfo actionInfo = TaskManager.Current().GetActionInfo;
                return RedirectToAction(actionInfo.ActionName, actionInfo.ControllerName, new RouteValueDictionary { { "area", actionInfo.AreaName }, { "index", TaskManager.GetCurrentStepInfoIndex() } });
            }

            if (TaskManager.Bus.ContainsKey(ImportMetadataStructureTaskManager.METADATASTRUCTURE_ID))
            {
                long metadatstructureId = Convert.ToInt64(TaskManager.Bus[ImportMetadataStructureTaskManager.METADATASTRUCTURE_ID]);
                model.MetadataNodes = GetMetadataNodes();
                model.StepInfo.notExecuted = true;
            }

            return PartialView(model);
        }