private async void ReloadTransactions() { var transactionHelper = new TransactionsHelper(new TransactionsRepository()); try { var transactions = await transactionHelper .GetUserTransactions(Domain.Constants.Constants.TestUserId, _sortingModel); var listViewItems = GetTransactionsListViewItems(transactions); _transactions.Items.Clear(); _transactions.Items.AddRange(listViewItems); } catch (ArgumentNullException ex) { Error.ShowDialog(ex.Message); } }