本文實(shí)例為大家講解了jquery zTree樹插件的基本使用方法，具體內(nèi)容如下
一、節(jié)點(diǎn)模糊搜索功能：搜索成功后，自動高亮顯示并定位、展開搜索到的節(jié)點(diǎn)。
二、節(jié)點(diǎn)異步加載：1、點(diǎn)擊展開時加載數(shù)據(jù)；2、選中節(jié)點(diǎn)時加載數(shù)據(jù)。
前臺代碼如下：
<script type="text/javascript">
//ztree設(shè)置
var setting = {
view: {
fontCss: getFontCss
},
check: {
enable: true
},
data: {
simpleData: {
enable: true,
idKey: "id",
pIdKey: "pId",
rootPId: 0
}
},
async: {
enable: true,
url: "#{getStudentsJsonUrl}",
autoParam: ["id", "level"]
},
callback: {
beforeCheck: zTreeBeforeCheck,
onNodeCreated: zTreeOnNodeCreated,
beforeExpand: zTreeBeforeExpand
}
};
var reloadFlag = false; //是否重新異步請求
var checkFlag = true; //是否選中
//節(jié)點(diǎn)展開前
function zTreeBeforeExpand(treeId, treeNode) {
reloadFlag = false;
return true;
};
//節(jié)點(diǎn)創(chuàng)建后
function zTreeOnNodeCreated(event, treeId, treeNode) {
var zTree = $.fn.zTree.getZTreeObj(treeId);
if (reloadFlag) {
if (checkFlag) {
zTree.checkNode(treeNode, true, true);
}
if (!treeNode.children) {
zTree.reAsyncChildNodes(treeNode, "refresh");
}
}
};
//選中節(jié)點(diǎn)前
function zTreeBeforeCheck(treeId, treeNode) {
var zTree = $.fn.zTree.getZTreeObj(treeId);
if (!treeNode.children) {
reloadFlag = true;
checkFlag = true;
zTree.reAsyncChildNodes(treeNode, "refresh");
}
return true;
}
//頁面加載完成
_run(function () {
require(['zTree/js/jquery.ztree.all-3.5'], function () {
$.ajax({
type: "POST",
url: "#{getStudentsJsonUrl}",
success: function (data) {
if (data && data.length != 0) { //如果結(jié)果不為空
$.fn.zTree.init($("#tree"), setting, data);
}
else { //搜索不到結(jié)果
}
}
});
});
//提交
$("#inputSubmit").click(function () {
var zTree = $.fn.zTree.getZTreeObj("tree");
var nodes = zTree.getCheckedNodes(true);
var ids = "";
var names = "";
for (var i = 0; i < nodes.length; i++) { //遍歷選擇的節(jié)點(diǎn)集合
if (!nodes[i].isParent) {
ids += nodes[i].id.replace("level" + nodes[i].level, "") + ",";
names += nodes[i].name + ",";
}
}
Simpo.ui.box.hideBox();
parent.$(".boxFrm").contents().find("#inputRange").val(names.substr(0, names.length - 1));
parent.$(".boxFrm").contents().find("#hidRange").val(ids.substr(0, ids.length - 1));
})
});
//查找節(jié)點(diǎn)
var lastNodeList = [];
var lastKey;
function searchNode() {
var zTree = $.fn.zTree.getZTreeObj("tree");
var key = $.trim($("#inputSearchNode").val());
if (key != "" && key != lastKey) {
nodeList = zTree.getNodesByParamFuzzy("name", key);
for (var i = 0, l = lastNodeList.length; i < l; i++) { //上次查詢的節(jié)點(diǎn)集合取消高亮
lastNodeList[i].highlight = false;
zTree.updateNode(lastNodeList[i]);
}
zTree.expandAll(false); //全部收縮
if (nodeList.length > 0) {
for (var i = 0, l = nodeList.length; i < l; i++) { //遍歷找到的節(jié)點(diǎn)集合
if (nodeList[i].getParentNode()) {
zTree.expandNode(nodeList[i].getParentNode(), true, false, false); //展開其父節(jié)點(diǎn)
}
nodeList[i].highlight = true;
zTree.updateNode(nodeList[i]);
}
}
zTree.refresh(); // 很重要，否則節(jié)點(diǎn)狀態(tài)更新混亂。
lastNodeList = nodeList;
lastKey = key;
}
}
//加載數(shù)據(jù)
function loadData() {
var zTree = $.fn.zTree.getZTreeObj("tree");
var rootNodes = zTree.getNodes();
reloadFlag = true;
checkFlag = false;
for (var i = 0; i < rootNodes.length; i++) {
if (!rootNodes[i].children) {
zTree.reAsyncChildNodes(rootNodes[i], "refresh"); //異步加載
}
}
}
//全部收縮
function closeAll() {
var zTree = $.fn.zTree.getZTreeObj("tree");
if ($("#inputCloseAll").val() == "全部收縮") {
zTree.expandAll(false);
$("#inputCloseAll").val("全部展開")
}
else {
zTree.expandAll(true);
$("#inputCloseAll").val("全部收縮")
}
}
//高亮樣式
function getFontCss(treeId, treeNode) {
return (treeNode.highlight) ? { color: "#A60000", "font-weight": "bold"} : { color: "#333", "font-weight": "normal" };
}
</script>
--------------------------------------------------------------------------
<div>
<ul id="tree">
</ul>
</div>
后臺代碼（后臺返回Json數(shù)據(jù)）：
public void SelStudent()
{
set("getStudentsJsonUrl", to(GetStudentsJson));
}
public void GetStudentsJson()
{
List<Dictionary<string, string>> dicList = new List<Dictionary<string, string>>();
string level = ctx.Post("level");
string id = ctx.Post("id");
if (strUtil.IsNullOrEmpty(id))
{
#region 加載班級
//獲取當(dāng)前登錄用戶
Sys_User user = AdminSecurityUtils.GetLoginUser(ctx);
//獲取當(dāng)前用戶關(guān)聯(lián)的老師
Edu_Teacher teacher = edu_TeacService.FindByUserId(user.Id);
//獲取班級集合
List<Edu_ClaNameFlow> list = edu_ClaNameFlowService.GetListByTeacherId(teacher.Id);
foreach (Edu_ClaNameFlow item in list)
{
Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("id", "level0" + item.Calss.Id.ToString());
dic.Add("pId", "0");
dic.Add("name", item.Gra.Name + item.Calss.Name);
dic.Add("isParent", "true");
dicList.Add(dic);
}
#endregion
}
else
{
if (level == "0")
{
//加載學(xué)生
List<Edu_Student> list = edu_StudService.GetListByClassId(id.Replace("level0", ""));
foreach (Edu_Student item in list)
{
Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("id", "level1" + item.Id.ToString());
dic.Add("pId", id);
dic.Add("name", item.Name);
dic.Add("isParent", "false");
dicList.Add(dic);
}
}
}
echoJson(dicList);
}
三、基于cookie實(shí)現(xiàn)zTree樹刷新后，展開狀態(tài)不變
1、除了引用jQuery和zTree的JS外，引用cookie的JS：
復(fù)制代碼 代碼如下:
<script type="text/javascript" src="~/Scripts/jquery-treeview/lib/jquery.cookie.js"></script>
2、JS代碼：
$(function () {
//ztree設(shè)置
var setting = {
data: {
simpleData: {
enable: true,
idKey: "id",
pIdKey: "pId",
rootPId: null
}
},
callback: {
onExpand: onExpand,
onCollapse: onCollapse
}
};
$.ajax({
type: "POST",
url: "/Tech/TemplateTypeManage/GetData",
success: function (data) {
if (data && data.length != 0) {
$.fn.zTree.init($("#tree"), setting, data);
var treeObj = $.fn.zTree.getZTreeObj("tree");
var cookie = $.cookie("z_tree" + window.location);
if (cookie) {
z_tree = JSON2.parse(cookie);
for (var i = 0; i < z_tree.length; i++) {
var node = treeObj.getNodeByParam('id', z_tree[i])
treeObj.expandNode(node, true, false)
}
}
}
}
});
});//end $
function onExpand(event, treeId, treeNode) {
var cookie = $.cookie("z_tree" + window.location);
var z_tree = new Array();
if (cookie) {
z_tree = JSON2.parse(cookie);
}
if ($.inArray(treeNode.id, z_tree) < 0) {
z_tree.push(treeNode.id);
}
$.cookie("z_tree" + window.location, JSON2.stringify(z_tree))
}
function onCollapse(event, treeId, treeNode) {
var cookie = $.cookie("z_tree" + window.location);
var z_tree = new Array();
if (cookie) {
z_tree = JSON2.parse(cookie);
}
var index = $.inArray(treeNode.id, z_tree);
z_tree.splice(index, 1);
for (var i = 0; i < treeNode.children.length; i++) {
index = $.inArray(treeNode.children[i].id, z_tree);
if (index > -1) z_tree.splice(index, 1);
}
$.cookie("z_tree" + window.location, JSON2.stringify(z_tree))
}
以上就是關(guān)于樹插件zTree異步加載、模糊搜索簡單實(shí)例講解，希望對大家的學(xué)習(xí)有所幫助。