public async Task CandidatureGroupChart() { try { filterLayout.IsVisible = false; CandidatureGroupFrame.IsVisible = true; CandidatureGroupGraph.IsVisible = true; var getCandidature = await CommonLib.AllCandidatures(CommonLib.ws_MainUrlMain + "CandidatureApi/GetAllCandidature"); if (getCandidature.chartData != null) { foreach (var item in getCandidature.chartData) { CandidatureId = item.CandidatureCode; break; } pickerCandidature.ItemsSource = getCandidature.chartData; pickerCandidature.SelectedIndex = 0; } } catch (Exception ex) { await App.Current.MainPage.DisplayAlert("", ex.Message, "OK"); } }