wpf 如何投射 System.Windows.Controls.SelectedItemCollection？
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How to cast a System.Windows.Controls.SelectedItemCollection?
提问by Matt Searles
I have a method:
我有一个方法：
private void DeletePuzzle(object param)
{
}
param is a System.Windows.Controls.SelectedItemCollection, that I got from a WPF ListView's SelectedItemsproperty.
param 是一个System.Windows.Controls.SelectedItemCollection，我从 WPFListView的SelectedItems属性中获得。
Somehow, I can't seem to cast it from an object to anything useful. I can't create a System.Windows.Controls.SelectedItemCollectionbecause of its protection level, and param won't cast to IList, ICollectionor IEnumerable.
不知何故，我似乎无法将它从一个对象转换为任何有用的东西。System.Windows.Controls.SelectedItemCollection由于其保护级别，我无法创建 a ，并且 param 不会强制转换为IList,ICollection或IEnumerable。
How can I iterate through param's items?
如何遍历参数的项目？
回答by Matt Searles
Right, got it sorted. I kept trying to cast it like
对了，整理好了。我一直试图把它像
IList<PuzzleViewModel> collection = (IList<PuzzleViewModel>)param;
Which told me it couldn't convert from SelectedItemCollection to IList...
这告诉我它无法从 SelectedItemCollection 转换为 IList ...
This is in fact what you need to do.
这实际上是您需要做的。
System.Collections.IList items = (System.Collections.IList)param;
var collection = items.Cast<PuzzleViewModel>();
回答by Aran Mulholland
from reflector : -
从反射器： -
[Category("Appearance"), Bindable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public IList SelectedItems
{
get
{
return base.SelectedItemsImpl;
}
}
Selected Items of ListView is an IList, id like to see the calling method.
ListView的Selected Items是一个IList，id喜欢看调用方法。
回答by pipelinecache
Check The Type:
System.Collections.Generic.IList<(Of <(ListViewDataItem>)>)
检查类型：
System.Collections.Generic.IList<(Of <(ListViewDataItem>)>)
