Wpf 帮助在.NET中对XML数据进行排序（可能使用LINQ查询？）

我有这种XML层次结构

  <Chapters>
   <Chapter @num="">
    <Section @letter="">
     <Heading @num="" />
    </Section>
   </Chapter>
  </Chapters>

从那里我迷路了。我尝试了这件疯狂的事情以获得我想要的全部结果，但这对我也没有任何好处：

Dim chapsorted = From c In root.Elements
             Order By c.@num Ascending
             Select (From sec In c.Elements Order By sec.@letter Where sec.Parent Is c Select
                    (From hed In sec.Elements Order By hed.@num Where hed.Parent Is sec)))

那对我也没有好处

---

必须有一个简单的方法来做到这一点……：-）非常感谢您的帮助，我已经转了好几个小时了。

我认为您的第一个问题是正确的。通过从原始的

XElement

复制名称和属性，从已排序节点的结果列表中构建

XElement

，然后嵌套该结构：

Dim chapsorted = New XElement(root.Name, _
    root.Attributes, _
    From c In root.Elements _
    Order By c.@num Ascending _
    Select New XElement(c.Name, _
        c.Attributes, _
        From s In c.Elements _
        Order By s.@letter Ascending _
        Select New XElement(s.Name, _
            s.Attributes, _
            From h In s.Elements _
            Order By h.@num Ascending _
            Select h)))

如果在每一级都按同一属性排序，则可以执行如下递归解决方案：

Private Function SortChildElements(ByVal element As XElement) As XElement
    Return New XElement( _
        element.Name, _
        element.Attributes, _
        element.Nodes.Where(Function(node) Not TypeOf node Is XElement), _
        From child In element.Elements _
        Order By child.@num Ascending _
        Select SortChildElements(child))
End Function

Private Function SortChildElements(ByVal element As XElement) As XElement
    Return New XElement( _
        element.Name, _
        element.Attributes, _
        element.Nodes.Where(Function(node) Not TypeOf node Is XElement), _
        From child In element.Elements _
        Order By child.@num Ascending _
        Select SortChildElements(child))
End Function