【发布时间】：2014-01-10 06:36:05
【问题描述】：
我仍在尝试这样做。不知道怎么做。我有一个带有拖放功能的 ListBox 来移动项目并添加新项目。我想要做的是当用户用鼠标左键单击项目时没有任何反应。当他用鼠标右键单击时，它会选择它（多选）。
我试过e.Handled = true，问题是它不允许用户用鼠标滚动。我的列表框的事件：
private void LB_SongList_Drop(object sender, DragEventArgs e)
{
ListBox parent = sender as ListBox;
Song data = e.Data.GetData(typeof(Song)) as Song;
Song objectToPlaceBefore = GetObjectDataFromPoint(parent, e.GetPosition(parent)) as Song;
if (data != null && objectToPlaceBefore != null)
{
[...]//Code that moves object
parent.SelectedItems.Remove(data);
}
else
{
String[] file = e.Data.GetData(DataFormats.FileDrop, true) as String[];
if (file != null)
{
[...]//Code that adds new data
}
}
}
private void LB_SongList_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (!b_IsScrolling)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
MainPointer.Main_AllowClose = false;
ListBox parent = sender as ListBox;
Song data = GetObjectDataFromPoint(parent, e.GetPosition(parent)) as Song;
if (data != null)
{
parent.SelectedItems.Remove(data);
DragDrop.DoDragDrop(parent, data, DragDropEffects.Move);
}
}
}
}
private static object GetObjectDataFromPoint(ListBox source, Point point)
{
UIElement element = source.InputHitTest(point) as UIElement;
if (element != null)
{
object data = DependencyProperty.UnsetValue;
while (data == DependencyProperty.UnsetValue)
{
data = source.ItemContainerGenerator.ItemFromContainer(element);
if (data == DependencyProperty.UnsetValue) element = VisualTreeHelper.GetParent(element) as UIElement;
if (element == source) return null;
}
if (data != DependencyProperty.UnsetValue) return data;
}
return null;
}
private void LB_SongList_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
ListBox parent = sender as ListBox;
Song data = GetObjectDataFromPoint(parent, e.GetPosition(parent)) as Song;
if (data != null)
{
LB_SongList.SelectedItems.Remove(data);
[...]//Code that plays a song on double click (should allow only left mouse button)
}
}
}
private void LB_SongList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (LB_SongList.SelectedItems.Count != 0)
{
[...]
}
else
{
[...]
}
}
有人可以帮忙吗？鼠标左键不选择任何项目。鼠标右键确实选择项目（多个）。
【问题讨论】：
-
请将您的 xaml 发布给我们。