实现树形结构的IEnumerable [英] Implementing IEnumerable on a tree structure
问题描述
- 的 http://dvanderboom.wordpress.com/2008/03/15/treet-implementing-a-non - 二进制树,在C /
- 的 http://www.matthidinger.com/archive/2009/02/08/asp.net-mvc-recursive-treeview-helper.aspx 一>
- http://dvanderboom.wordpress.com/2008/03/15/treet-implementing-a-non-binary-tree-in-c/
- http://www.matthidinger.com/archive/2009/02/08/asp.net-mvc-recursive-treeview-helper.aspx
我想实现,将被用作这种树视图助手:
I am trying to implement a TreeView helper that would be used as such:
<%= Html.TreeView("records",
Library.Instance.Records,
r => r.Children,
r => r.ID) %>
和树状结构的定义如下:
And the tree structure is defined like this:
public class Tree<T> : TreeNode<T> where T : TreeNode<T>
{ }
public class TreeNode<T> : IDisposable where T : TreeNode<T>
{
public T Parent { get; set; }
public TreeNodeList<T> Children { get; set; }
}
public class TreeNodeList<T> : List<TreeNode<T>> where T : TreeNode<T>
{
public T Parent;
public T Add(T node)
{
base.Add(node);
node.Parent = (T)Parent;
return node;
}
public void Remove(T node)
{
if (node != null)
node.Parent = null;
base.Remove(node);
}
}
和TreeView的助手有此签名:
And the TreeView helper has this signature:
public static string TreeView<T>(this HtmlHelper htmlHelper, string treeId,
IEnumerable<T> rootItems, Func<T, IEnumerable<T>> childrenProperty,
Func<T, string> itemContent, bool includeJavascript, string emptyContent)
{
...
}
因此,作为一个结果,我需要我的树struture来实现IEnumerable,所以我可以用树视图助手使用它,这导致的问题:?在哪里以及如何将我实现在这种情况下的IEnumerable
So as a result i need my Tree struture to implement IEnumerable so i can use it with the TreeView helper, and this leads to the question: where and how would i implement IEnumerable in this situation?
推荐答案
本文章由韦斯·戴尔是任何良好的阅读谁愿意实现递归迭代树:
This article by Wes Dyer is good reading for anyone who wants to implement a recursive tree iterator:
的 http://blogs.msdn.com/wesdyer/archive/2007/03/23/all-about-iterators.aspx
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