WPF; 单击 ListView 中的空白区域时如何取消选择所有选定的项目
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WPF; How Deselect all my selected items when click on empty space in my ListView
提问by Verint Verint
When i have several (or even one) selected itemsand i press simple clickon empty space in my ListView(empty space = not row) i want to deselect all my selected items.
当我有几个（甚至一个）selected items并且我click在我的ListView空白空间（空白空间 = 不是行）上按简单时，我想取消选择所有选定的项目。
This is my deselect all item function:
这是我取消选择所有项目的功能：
private void DeselectAllListViewItems()
{
MyListView.SelectedItems.Clear();
}
I try to take the selected index with this function:
我尝试使用此功能获取选定的索引：
private void MyListView_MouseDown(object sender, MouseButtonEventArgs e)
{
if (MyListView.SelectedIndex == -1)
DeselectAllListViewItems();
}
But in case i have several selected items (or one..) the selected index will never be -1.
So how can i distinguish that my mouse clickis on empty space and not on item row ?
但如果我有几个选定的项目（或一个..），选定的索引永远不会是 -1。那么我如何区分我mouse click是在空白处而不是在项目行上？
回答by J3soon
The code below works quite well.
下面的代码工作得很好。
private void MyListView_MouseDown(object sender, MouseButtonEventArgs e)
{
HitTestResult r = VisualTreeHelper.HitTest(this, e.GetPosition(this));
if (r.VisualHit.GetType() != typeof(ListBoxItem))
listView1.UnselectAll();
}
