private void TypeComo_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (HistoryTypeComo.SelectedIndex == 0) { PackComo.Visibility = Visibility.Collapsed; hvm.DataHistory = ViewModel.dataCurrentMaster.Clone(); HistotyGrid.ColumnsSource = hvm.MasterDataColumn; //TypeComobox设定绑定源要放在最后定义 TypeComobox.ItemsSource = ViewModel.MasterListComobox; HistotyGrid.ItemsSource = hvm.DataHistory; CreateChart(null); } else { hvm.SendReadPackStatus(); if (!hvm.OffConnect) { PackComo.Visibility = Visibility.Visible; } HistotyGrid.ColumnsSource = hvm.PackListColumn; //TypeComobox设定绑定源要放在最后定义 TypeComobox.ItemsSource = hvm.PackDataTypeComobox; } }