删除项目后，WPF Listbox多项选择将清除

Question

我在WPF中有一个带有DataBinded Xml Collection的ListBox。我将SelectionMode设置为Extended，以便用户可以选择多个项目。我有一个RemoveItem命令，它遍历selecteditems并从列表中删除它们：

   var selecteditems = this.SelectedItems;
   for(int i = 0; i < selecteditems.Count; i++ )
   {
        ItemBox ouritem = (ItemBox)this.ItemContainerGenerator.ContainerFromItem(this.SelectedItems[i]);
         XmlDataProvider prov = this.DataContext as XmlDataProvider;
         XmlNode MainNode = prov.Document.SelectSingleNode("//MainNode");
         MainNode.RemoveChild(selecteditems[i] as XmlNode);

   }

问题是删除选择的第一项后，清除选择并选择列表的最后一项。

如何保留我开始的选择并确保删除所有项目？

Answer 1

旧的'先复制'方法怎么样？：

IList selectedItems = new List<YourDataType>();
foreach (YourDataType item in this.SelectedItems) selectedItems.Add(item);
for (int index = selectedItems.Count - 1; index >= 0; index--)
{
    // remove each selected item here
}

Answer 2

以反向迭代执行循环。

 var selecteditems = this.SelectedItems;
 for(int i = selecteditems.Count-1; i>=0; i-- )
 {
    ItemBox ouritem = (ItemBox)this.ItemContainerGenerator.ContainerFromItem(this.SelectedItems[i]);
     XmlDataProvider prov = this.DataContext as XmlDataProvider;
     XmlNode MainNode = prov.Document.SelectSingleNode("//MainNode");
     MainNode.RemoveChild(selecteditems[i] as XmlNode);

 }