在树结构上实现IEnumerable [英] Implementing IEnumerable on a tree structure
本文介绍了在树结构上实现IEnumerable的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
根据这些家伙的工作:
- 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
- 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
我正试图实现一个TreeView帮助器,可以这样使用:
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) %>
树结构定义如下:
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);
}
}
TreeView帮助器有这个签名:
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,我需要我的Tree struture来实现IEnumerable,所以我可以使用它与TreeView帮助,这导致的问题:在这种情况下,我在哪里和如何实现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
Wes Dyer的这篇文章是很好的阅读,实现递归树迭代器:
This article by Wes Dyer is good reading for anyone who wants to implement a recursive tree iterator:
http://blogs.msdn.com/wesdyer/archive/2007/03/23/all-about-iterators.aspx
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