MVVM实施中的疑问

这就是我实现的体系结构。

基本上,我想在视图2中选择“单元格”,“位置”将从选定的单元格填充。然后我有一个带有“系统”的组合框,我希望在系统选择时,填充不同的单元格集。为此,我使用IOC访问不同的视图模型。

我怀疑自己是否已经按照MVVM模式实现了。带有的部件 UpdateModel 我觉得不太好。如果有人能回顾一下架构并告诉我哪些地方我可以做得更好,我将不胜感激。另外,在视图模型中有模型实例是正确的,还是应该使用数据服务模式,如mvvm-light样板中的模式?

问题:我可以在不调用UpdateModel函数,而是使用mvvm-light的本地机制来更新ViewModel2的情况下实现对系统更改的响应吗?

下面是代码的一些关键部分。

视图模型2:

    public List<string> LocationList
    {
        get
        {
            var cells = _wList.GetCells(currentSystemNumber);
            var cell = cells[_selectedCellItem.Key];
            return cell.Locations;
        }
    }

    private KeyValuePair<int, string> _selectedCellItem;
    public KeyValuePair<int, string> SelectedCellItem
    {
        get
        {
            return _selectedCellItem;
        }

        set
        {
            Set(ref _selectedCellItem, value);
            RaisePropertyChanged("LocationList");
        }
    }

    public ObservableCollection<KeyValuePair<int, string>> CellList
    {
        get
        {
            int count = _wList.GetCells(currentSystemNumber).Count;
            ObservableCollection<KeyValuePair<int, string>> cells = new ObservableCollection<KeyValuePair<int, string>>();
            for(int i = 0; i < count; i++)
                cells.Add(new KeyValuePair<int, string>(i, string.Format("Cell {0}/{1}", i, currentSystemNumber+1)));
            return cells;
        }
    }

    public void UpdateModel(int system)
    {
        currentSystemNumber = system;

        RaisePropertyChanged("CellList");
        RaisePropertyChanged("LocationList");
    }

视图2:

<Grid>
    <ListBox x:Name="listBox" HorizontalAlignment="Left" Height="104" Margin="121,32,0,0" VerticalAlignment="Top" Width="144" ItemsSource="{Binding LocationList}"/>
    <ListBox x:Name="listBox1" HorizontalAlignment="Left" Height="104" Margin="10,32,0,0" VerticalAlignment="Top" Width="102" ItemsSource="{Binding CellList}" SelectedItem="{Binding SelectedCellItem}" DisplayMemberPath="Value"/>
    <Label x:Name="label" Content="Cells" HorizontalAlignment="Left" Margin="10,1,0,0" VerticalAlignment="Top"/>
    <Label x:Name="label1" Content="Locations" HorizontalAlignment="Left" Margin="121,1,0,0" VerticalAlignment="Top"/>
</Grid>

视图模型1:

    private ObservableCollection<KeyValuePair<int, string>> _systems = new ObservableCollection<KeyValuePair<int, string>>();
    public ObservableCollection<KeyValuePair<int, string>> Systems
    {
        get
        {
            return _systems;
        }
    }

    private KeyValuePair<int, string> _selectedSystemItem;
    public KeyValuePair<int, string> SelectedSystemItem
    {
        get
        {
            return _selectedSystemItem;
        }
        set
        {
            Set(ref _selectedSystemItem, value);
            var locator = (ViewModelLocator)Application.Current.Resources["Locator"];
            var vm = locator.DASrvPageVM;
            vm.UpdateModel(value.Key);
        }
    }