ArcGISPortalViewer.Model.PortalService.GetSearchResults C# (CSharp) Method

        public async Task<SearchResultInfo<ArcGISPortalItem>> GetSearchResults(SearchParameters searchParameters)
        {  
            if (searchParameters == null || string.IsNullOrEmpty(searchParameters.QueryString))
                return null;

            if (CurrentPortalService.Portal == null)
                return null;

            string accountId = CurrentPortalService.Portal.ArcGISPortalInfo == null ? "" : CurrentPortalService.Portal.ArcGISPortalInfo.Id;
            if (!string.IsNullOrEmpty(accountId) && OrganizationResultsOnly) //!this.Portal.ArcGISPortalInfo.CanSearchPublic)
            {
                string queryString = string.Format("({0}) AND accountid:{1}", searchParameters.QueryString, accountId);
                searchParameters = new SearchParameters(queryString)
                {
                    Limit = searchParameters.Limit,
                    SortField = searchParameters.SortField,
                    SortOrder = searchParameters.SortOrder,
                    StartIndex = searchParameters.StartIndex
                    //QueryString = string.Format("({0}) AND accountid:{1}", searchParameters.QueryString, accountId)                    
                };
            }

            try
            {
                return await this.Portal.SearchItemsAsync(searchParameters);
            }
            catch (Exception)
            {
                
                throw;
            }            
        }