【原创】使用yahoo雅虎js库（YUI）建立无刷新的N级树（可添加删除节点）

1、首先你要去下面地址下载yahoo类库
http://developer.yahoo.com/yui/ 2。5版本的 8。84M，你可以不全用，只用树的
2、然后需要把yui/build/treeview/文件夹下面的文件复制到你的工程

3、需要引用下面的js

所有的js代码


<link rel="stylesheet" type="text/css" href="/yui/build/treeview/assets/skins/sam/treeview.css" />


<link rel="stylesheet" type="text/css" href="/yui/build/menu/assets/skins/sam/menu.css">




<script type="text/javascript" src="/yui/build/yahoo/yahoo.js"></script>




<script type="text/javascript" src="/yui/build/event/event.js"></script>




<script type="text/javascript" src="/yui/build/treeview/treeview.js"></script>







<!-- Dependency source files -->




<script type="text/javascript" src="/yui/build/yahoo-dom-event/yahoo-dom-event.js"></script>




<script type="text/javascript" src="/yui/build/container/container_core.js"></script>




<!-- Menu source file -->




<script type="text/javascript" src="/yui/build/menu/menu.js"></script>

页面html代码


<div class="yui-skin-sam">


<div id="treeDiv1">


</div>


</div>


<script type="text/javascript">

var channelId=0;
var treeId=0;
function LoadChannelTree(obj)
{
channelId=obj.value;
if (channelId!=0)
{
var ds_Normal=AjaxForTree.GetTree(channelId).value;

if(ds_Normal != null && typeof(ds_Normal) == "object" && ds_Normal.Tables.length != 0 && ds_Normal.Tables[0].Rows.length != 0)
{
treeId=ds_Normal.Tables[0].Rows[0].TreeId;
treeInit();
//alert(treeId);
}
else
{
treeId=0;
document.getElementById("treeDiv1").innerHTML="<a href='#' style='text-decoration:underline;' onclick='initChannelTree();'>该频道下还没有TAG树，请点击这里创建TAG树。</a>";
}
document.getElementById("releaseTreeSpan").style.display="block";

}
else
{
document.getElementById("releaseTreeSpan").style.display="none";
document.getElementById("treeDiv1").innerText="";
}
document.getElementById("releaseTree").href="/Tag/TagTreePosition.aspx?TreeId="+treeId+"&placeValuesBeforeTB_=savedValues&TB_iframe=true&height=500&width=770";
}

function LoadNodeContent(nodeId)
{
var param="NodeId=" + nodeId;
ShowContentA("/controls/Tag/TagListForTree.ashx",param,document.getElementById("NodeContent"),null);
}

function initChannelTree()
{
var res=AjaxForTree.CreateTree(channelId).value;

if(res!=-1)
{
treeId=res;
treeInit();
}
else
{
document.getElementById("treeDiv1").innerHTML="树创建失败！";
}
}

//global variable to allow console inspection of tree:
var tree;
var currentTreeNodeId;
var oTextNodeMap = {};
function treeInit() {

tree = new YAHOO.widget.TreeView("treeDiv1");

var myobj="{label:'所有',id:'1'}";
myobj=eval('('+myobj+')');
var rootNode = new YAHOO.widget.TextNode(myobj, tree.getRoot(), true);
oTextNodeMap[rootNode.labelElId]=rootNode;

buildChildNodeTree(rootNode,treeId);
tree.subscribe("expand", function(node) {

});

tree.subscribe("collapse", function(node) {

});

// Trees with TextNodes will fire an event for when the label is clicked:
tree.subscribe("labelClick", function(node) {
var nodeId=node.data.id;
document.getElementById('TagBtnList').style.display='';
document.getElementById('addTags').href='/Tag/SelectTreeTag.aspx?TreeNodeId='+nodeId+'&placeValuesBeforeTB_=savedValues&TB_iframe=true&height=500&width=770';
//document.getElementById('addTags').href='/PositionMore.aspx?placeValuesBeforeTB_=savedValues&TB_iframe=true&height=500&width=770';
LoadNodeContent(nodeId);
currentTreeNodeId=nodeId;
});

//alert(tree.getRoot());
//The tree is not created in the DOM until this method is called:
tree.draw();


}

function buildChildNodeTree( node )
{
var nodeId=node.data.id;
//alert(nodeId);
var ds_Normal=AjaxForTree.GetChildNode(nodeId,treeId).value;
if(ds_Normal != null && typeof(ds_Normal) == "object" && ds_Normal.Tables != null)
{

for(var i=0;i<ds_Normal.Tables[0].Rows.length;i++)
{
var TreeNodeId=ds_Normal.Tables[0].Rows[i].TreeNodeId;
var TreeNodeName=ds_Normal.Tables[0].Rows[i].TreeNodeName;

var myobj="{label:'" + TreeNodeName + "',id:'" + TreeNodeId + "'}";
myobj=eval('('+myobj+')');
var tmpNode = new YAHOO.widget.TextNode(myobj, node, true);
oTextNodeMap[tmpNode.labelElId]=tmpNode;
ds_child=AjaxForTree.GetChildNode(TreeNodeId,treeId).value;
if(ds_child != null && ds_child.Tables != null && ds_child.Tables[0].Rows.length!=0)
{
//alert(ds_child.Tables[0].Rows.length);
tmpNode.setDynamicLoad(loadDataForNode);
}
}

}




}

//Add an onDOMReady handler to build the tree when the document is ready
//YAHOO.util.Event.onDOMReady(treeInit);

function loadDataForNode(node, onCompleteCallback) {

buildChildNodeTree(node,treeId);
onCompleteCallback();
}

/*
The YAHOO.widget.TextNode instance whose "contextmenu"
DOM event triggered the display of the
ContextMenu instance.
*/

var oCurrentTextNode = null;

/*
Adds a new TextNode as a child of the TextNode instance
that was the target of the "contextmenu" event that
triggered the display of the ContextMenu instance.
*/

function addNode() {

var sLabel = window.prompt("请为新建立的节点输入名称: ", "");
var rtn=CheckIsValid(sLabel);
if (!rtn)
{
alert('您输入的内容中含有非法字符，这里只允许输入字母或数字！');
return;
}
if (sLabel && sLabel.length > 0) {

var nodeId=oCurrentTextNode.data.id;
var res=AjaxForTree.AddTreeNode(nodeId,sLabel,treeId).value;
//alert(res);
treeInit();

}

}

/*
Edits the label of the TextNode that was the target of the
"contextmenu" event that triggered the display of the
ContextMenu instance.
*/

function editNodeLabel() {
if (oCurrentTextNode.data.id==1)
{
alert('根节点不能编辑！');
return;
}

var sLabel = window.prompt("请为当前的节点输入新的名称: ", oCurrentTextNode.getLabelEl().innerHTML);
var rtn=CheckIsValid(sLabel);
if (!rtn)
{
alert('您输入的内容中含有非法字符，这里只允许输入字母或数字！');
return;
}
if (sLabel && sLabel.length > 0) {

var nodeId=oCurrentTextNode.data.id;
var res=AjaxForTree.EditTreeNode(nodeId,sLabel).value;
treeInit();
}

}

/*
Deletes the TextNode that was the target of the "contextmenu"
event that triggered the display of the ContextMenu instance.
*/

function deleteNode() {

var isTrue=window.confirm("您确认删除这个节点吗？");
if (isTrue)
{
if (oCurrentTextNode.data.id==1)
{
alert('根节点不能删除！');
return;
}
var nodeId=oCurrentTextNode.data.id;
var res=AjaxForTree.DelTreeNode(nodeId).value;
treeInit();
}

}

/*
"contextmenu" event handler for the element(s) that
triggered the display of the ContextMenu instance - used
to set a reference to the TextNode instance that triggered
the display of the ContextMenu instance.
*/

function onTriggerContextMenu(p_oEvent) {


function getTextNodeFromEventTarget(p_oTarget) {

if (p_oTarget.tagName.toUpperCase() == "A" &&
p_oTarget.className == "ygtvlabel") {

return oTextNodeMap[p_oTarget.id];

}
else {

if (p_oTarget.parentNode &&
p_oTarget.parentNode.nodeType == 1) {

return getTextNodeFromEventTarget(p_oTarget.parentNode);

}

}

}


var oTextNode = getTextNodeFromEventTarget(this.contextEventTarget);


if (oTextNode) {

oCurrentTextNode = oTextNode;

}
else {

// Cancel the display of the ContextMenu instance.

this.cancel();

}

}

var oContextMenu = new YAHOO.widget.ContextMenu("mytreecontextmenu", {
trigger: "treeDiv1",
lazyload: true,
itemdata: [
{ text: "增加子节点", onclick: { fn: addNode } },
{ text: "编辑当前节点", onclick: { fn: editNodeLabel } },
{ text: "删除当前节点", onclick: { fn: deleteNode } }
] });

oContextMenu.subscribe("triggerContextMenu", onTriggerContextMenu);

</script>