c# - 如何针对 ListCollectionView 编写 linq 查询？

Question

这些似乎都不起作用:

var source = myViewModel.MyListCollectionView.Select(x => x as MyType);
var source = myViewModel.MyListCollectionView.Select<object, MyType>(x => x as MyType);
var source = myViewModel.MyListCollectionView.SourceCollection.Select<object, MyType>(x => x as MyType);

Answer 1

ListCollectionView 仅实现非泛型 IEnumerable 接口(interface)。我怀疑你想要:

var source = myViewModel.MyListCollectionView.Cast<MyType>();

或者(如果某些值不是MyType，那没关系):

var source = myViewModel.MyListCollectionView.OfType<MyType>();