Question

我对这个扫描机找到适当的收集方法进行了研究。

Here is the signature of my desired ViewModel. There are some interesting alternatives out there David Hill s CollectionViewModel or ObservableDictionary(Of TKey, TValue) on codeplex. But for now, I would like a built-in collection (for SL4) that handles this. Thanks

public class myViewModel: INotifyPropertyChanged
{
    public ObservableCollection<MyDataType> MyCollection;
    private ObservableCollection<MyDataType> _myCollection;

    public CurrentItem<MyDataType>() { return _myCollection.CurrentItem;} 

    public int GetCurrentIndex()  { return _myCollection.CurrentIndex;}
    public SetCurrentIndex(int Index)   { _myCollection.CurrentIndex = Index;}

Answer 1

There isn t a built-in collection that provides this. However, you could just store the currentIndex value as a private int inside your ViewModel, and refer to it for the current index methods, as well as use it for CurrentItem<T>().

Answer 2

但我们确实需要这样的东西吗? 你们总是能够受“Model.MyCollection/”的约束,以获得目前选定的项目。

友情链接