一 开发环境
Windows 2003
VS 2005
Aptana
Ext2.0
二 客户端代码
HTML:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Reorder TreePanel</title>
<link rel="stylesheet" type="text/css" href="resources/css/ext-all.css" />
<!-- GC -->
<!-- LIBS -->
<script type="text/javascript" src="adapter/ext/ext-base.js"></script>
<!-- ENDLIBS -->
<script type="text/javascript" src="ext-all.js"></script>
<script type="text/javascript" src="reorder.js"></script>
</head>
<body>
<div id="tree-div" style="overflow:auto; height:300px;width:250px;border:1px solid #c3daf9;"></div>
</body>
</html>
JS:

Ext.onReady(function()...{
// shorthand
var Tree = Ext.tree;

var tree = new Tree.TreePanel(...{
el:'tree-div',
useArrows:true,
autoScroll:true,
animate:true,
enableDD:true,
containerScroll: true, 
loader: new Tree.TreeLoader(...{
dataUrl:'Ajax.aspx'
})
});
// set the root node
var root = new Tree.AsyncTreeNode(...{
text: '总公司',
draggable:false,
id:'source'
});
tree.setRootNode(root);
// render the tree
tree.render();
root.expand();
});三 服务端代码
新建一个Ajax.aspx页面
using System;
using System.Data;
using System.Web;
public partial class Ajax : System.Web.UI.Page
......{
protected void Page_Load(object sender, EventArgs e)
......{
string result = "[{"cls":"folder","id":10,"leaf":false,"children":[{"cls":"file","id":11,"leaf":true,"children":null,"text":"S600"},{"cls":"file","id":12,"leaf":true,"children":null,"text":"SLK200"}],"text":"业务部"}]";
Response.Write(result);
}
}

本文介绍了一个使用ExtJS实现的可拖拽TreePanel组件的示例,包括开发环境配置、客户端HTML及JavaScript代码,以及服务端C#代码。示例中TreePanel能够从服务器加载数据并支持节点拖拽重组。
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