如何针对ListCollectionView编写linq查询？

Question

这些似乎没有做到这一点:

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只实现非通用IEnumerable接口.我怀疑你想要:

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

或者(如果某些值MyType不合适,那没关系):

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

Answer 2

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