一、初始异步加载树
初始化默认给出一个根结点,再结合异步加载的方式手动触发默认加载第一层,如图:
代码如下:
var treeSetting = {
async: {
enable: true, url:"xxx/demo.do?method=listByTree",
dataType:"json",
autoParam:["id=pid"]
},
view: {
dblClickExpand: true,
selectedMulti: false,
expandSpeed: ($.browser.msie && parseInt($.browser.version)<=6)?"":"fast"
},
data: {
simpleData: {
enable:true,
idKey: "id",
pIdKey: "pid",
rootPId: "root"
}
},
callback: {
onNodeCreated: zTreeOnNodeCreated
}
};
//默认根结点
var rootNode = {"id":0, "pid":"root", "name":"商品分类", "open":true, "isParent":true};
$(document).ready(function(){
var zTreeObj = $.fn.zTree.init($("#tree"), treeSetting, rootNode);
var node = zTreeObj.getNodeByParam("id", 0, null);
zTreeObj.reAsyncChildNodes(node, "refresh");
});
二、异步搜索叶子结点
在使用JQuery ZTREE时可能要用到异步的方式模糊搜索叶子结点,如图:
而如果只使用ZTREE自带的展开方法zTreeObj.expandNode只是会展开改结点,无法触发异步加载;这时候就必须手动调用异步加载的方法进行处理,解决思路如下:
通过在otherParam数组中设值的方式将搜索参数带到后台(无参数时必须将otherParam设为空数组否则一直会将前一次的参数带到后台);在结点创建完成后的回调函数onNodeCreated中进行手动异步加载。
代码如下:
function searchM() {
var param = $.trim($("input[name='param']").val());
var treeObj = $.fn.zTree.getZTreeObj("tree");
var node = treeObj.getNodeByParam("id", 0, null);
if(param != ""){
param = encodeURI(encodeURI(param));
treeObj.setting.async.otherParam=["param", param];
}else {
//搜索参数为空时必须将参数数组设为空
treeObj.setting.async.otherParam=[];
}
treeObj.reAsyncChildNodes(node, "refresh");
}
function zTreeOnNodeCreated(event, treeId, treeNode) {
var param = $.trim($("input[name='param']").val());
var treeObj = $.fn.zTree.getZTreeObj("tree");
//只有搜索参数不为空且该节点为父节点时才进行异步加载
if(param != "" && treeNode.isParent){
treeObj.reAsyncChildNodes(treeNode, "refresh");
}
};