WPF-如何在菜单处理程序方法中找到单击的项?

签出ContextMenu.PlacementTarget,该对象可以在可视化树(VisualTreeHelper.GetParent)上漫游,直到找到ListViewItem。

万一其他人有这个问题,我最后会说:

private void ListViewItems_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
   var frameworkElement = e.OriginalSource as FrameworkElement;

   var item = frameworkElement.DataContext as MyDataItem;

   if(null == item)
   {
      return;
   }

   // TODO: Use item here...
}

如果每个数据项都有 IsSelected 绑定到 ListViewItem.IsSelected 属性,然后您只需遍历数据以查找选定的数据:

<ListView ItemsSource="{Binding Items}">
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
             <Setter Property="IsSelected" Value="{Binding IsSelected}"/>
        </Style>
    </ListView.ItemContainerStyle>
</ListView>

在你的代码中:

public ICollection<DataItem> Items
{
    get { return _items; }
}

public IEnumerable<DataItem> SelectedItems
{
    get
    {
         foreach (var item in Items)
         {
             if (item.IsSelected)
                 yield return item;
         }
    }
}

private void DoSomethingWithSelectedItems()
{
    foreach (var item in SelectedItems) ...
}