ASP.NET TreeView 的那点事
第一棵：使用AJAX 按需求建立一棵树 Building Tree View on demand using AJAX
http://www.cnblogs.com/OceanChen/archive/2009/02/07/1385664.html
这篇文章简单告诉我们如何使用AJAX异步生成树，且数据源为XML，看看截图，是不是很酷？当然你还可以在链接上下载源代码！
文章出去： http://www.codeproject.com/KB/aspnet/TreeViewAjax.aspx
第二棵：用使用JavaScript展开/折叠TreeView中所有节点(Expand and Collapse All Nodes of asp.net Treeview on the client with javascript)
http://www.cnblogs.com/OceanChen/archive/2009/02/07/1385662.html
这是我给客户的一个解决方案，为了节约时间，我直接贴可以跑到代码，同时没有写注释，希望谅解，
Code
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>TreeView Demo</title>
<script language="javascript" type="text/javascript">
function TreeviewExpandCollapseAll(treeViewId, expandAll) {
var displayState = (expandAll == true ? "none" : "block");
var treeView = document.getElementById(treeViewId);
if (treeView) {
var treeLinks = treeView.getElementsByTagName("a");
var nodeCount = treeLinks.length;
for (i = 0; i < nodeCount; i++) {
if (treeLinks[i].firstChild.tagName) {
if (treeLinks[i].firstChild.tagName.toLowerCase() == "img") {
var currentToggleLink = treeLinks[i];
var childContainer = GetParentByTagName("table", currentToggleLink).nextSibling;
if (childContainer.style.display == displayState) {
eval(currentToggleLink.href);
}
}
}
}
}
}
function GetParentByTagName(parentTagName, childElementObj) {
var parent = childElementObj.parentNode;
while (parent.tagName.toLowerCase() != parentTagName.toLowerCase()) {
parent = parent.parentNode;
}
return parent;
} </script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeViewDemo" runat="server" ExpandDepth="1">
<Nodes>
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A" Value="A">
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A1" Value="A1">
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A11" Value="A11"></asp:TreeNode>
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A12" Value="A12"></asp:TreeNode>
</asp:TreeNode>
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A2" Value="A2">
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A21" Value="A21"></asp:TreeNode>
<asp:TreeNode NavigateUrl="http://www.asp.net" Text="A22" Value="A22"></asp:TreeNode>
</asp:TreeNode>
</asp:TreeNode>
</Nodes>
</asp:TreeView>
<a href="javascript:TreeviewExpandCollapseAll('<%=TreeViewDemo.ClientID%>', true)">Expand
All</a> <a href="javascript:TreeviewExpandCollapseAll('<%=TreeViewDemo.ClientID%>', false)">
Collapse All</a>
</div>
</form>
</body>
</html>
刚刚从网上搜索我的文章时候，看到另外个文章和我写的差不多
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