ExtJs 3.1 XmlTreeLoader Example Error

前言

关键字：ExtJs 3.1 XmlTreeLoader Example Error,XmlTreeLoader 错误,TreePanel Error

ExtJs 3.1的XmlTreeLoader例子折腾了我近一个下午加晚上，官方的例子没有问题，可以加载xml的数据，本地IIS死活不行，也不报错，直接查看官方的代码也是一模一样的，今早意外给让我搜到了，不是在官方，而是在貌似一个韩国的博客里面找到的，致敬一下，本文且做其简单中文"译"本。

原文

http://javarush.com/entry/ExtJS-XmlTreeLoader-Error 

正文

1.

代码位置：Ext3.1\examples\tree\xml-tree-loader.js

2.

注意标红新增代码",requestMethod: 'GET'"!!

/*! 
* Ext JS Library 3.1.0 
* Copyright(c) 2006-2009 Ext JS, LLC 
* [e-mail] 
* http://www.extjs.com/license 
*/ // 
// Extend the XmlTreeLoader to set some custom TreeNode attributes specific to our application: 
// 
Ext.app.BookLoader = Ext.extend(Ext.ux.tree.XmlTreeLoader, { 
processAttributes : function(attr){ 
if(attr.first){ // is it an author node? 
// Set the node text that will show in the tree since our raw data does not include a text attribute: 
attr.text = attr.first + ' ' + attr.last; 
// Author icon, using the gender flag to choose a specific icon: 
attr.iconCls = 'author-' + attr.gender; 
// Override these values for our folder nodes because we are loading all data at once. If we were 
// loading each node asynchronously (the default) we would not want to do this: 
attr.loaded = true; 
attr.expanded = true; 
} 
else if(attr.title){ // is it a book node? 
// Set the node text that will show in the tree since our raw data does not include a text attribute: 
attr.text = attr.title + ' (' + attr.published + ')'; 
// Book icon: 
attr.iconCls = 'book'; 
// Tell the tree this is a leaf node. This could also be passed as an attribute in the original XML, 
// but this example demonstrates that you can control this even when you cannot dictate the format of 
// the incoming source XML: 
attr.leaf = true; 
} 
} 
}); 
Ext.onReady(function(){ 
var detailsText = '<i>Select a book to see more information...</i>'; 
var tpl = new Ext.Template( 
'<h2 class="title">{title}</h2>', 
'<p><b>Published</b>: {published}</p>', 
'<p><b>Synopsis</b>: {innerText}</p>', 
'<p><a href="{url}" target="_blank">Purchase from Amazon</a></p>' 
); 
tpl.compile(); 
new Ext.Panel({ 
title: 'Reading List', 
renderTo: 'tree', 
layout: 'border', 
width: 500, 
height: 500, 
items: [{ 
xtype: 'treepanel', 
id: 'tree-panel', 
region: 'center', 
margins: '2 2 0 2', 
autoScroll: true, 
rootVisible: false, 
root: new Ext.tree.AsyncTreeNode(), 
// Our custom TreeLoader: 
loader: new Ext.app.BookLoader({ 
dataUrl:'xml-tree-data.xml' 
,requestMethod: 'GET' 
}), 
listeners: { 
'render': function(tp){ 
tp.getSelectionModel().on('selectionchange', function(tree, node){ 
var el = Ext.getCmp('details-panel').body; 
if(node && node.leaf){ 
tpl.overwrite(el, node.attributes); 
}else{ 
el.update(detailsText); 
} 
}) 
} 
} 
},{ 
region: 'south', 
title: 'Book Details', 
id: 'details-panel', 
autoScroll: true, 
collapsible: true, 
split: true, 
margins: '0 2 2 2', 
cmargins: '2 2 2 2', 
height: 220, 
html: detailsText 
}] 
}); 
});

结束语

不要放弃和接受一次失败的搜索，不断的尝试改变搜索关键字，哪怕是用词霸翻成英文也得努力去试试，看不懂不要紧，看懂代码就行，代码无国界: )