前台html标签(asyncData.aspx页面....用于展示的页面)
<head runat="server">
<title></title>
<link href="JQuery%20ZTree/css/demo.css" rel="stylesheet" type="text/css" />
<link href="JQuery%20ZTree/css/zTreeStyle/zTreeStyle.css" rel="stylesheet" type="text/css" />
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script src="JQuery%20ZTree/js/jquery.ztree.core-3.5.js" type="text/javascript"></script>
<script type="text/javascript">
var zNodes;
var zTree;
//setting异步加载的设置
var setting = {
async: {
enable:true, //表示异步加载生效
url: "WebData.aspx", // 异步加载时访问的页面
autoParam: ["id"], // 异步加载时自动提交的父节点属性的参数
otherParam:["ajaxMethod",'AnsyData'], //ajax请求时提交的参数
type:'post',
dataType:'json'
},
checkable: true,
showIcon: true,
showLine: true, // zTree显示连接线
data: { //data的设置表示json数据是以这种格式显示的 zNodes = [{ "id": 1, "pId": 0, "name": "zhangsan" } ,{ "id": 2, "pId": 1, "name": "lisi" }]; 用pId来标识父子节点的关系
simpleData: {
enable: true
}
},
expandSpeed: "", // 设置 zTree 节点展开、折叠的动画速度，默认为"fast"，""表示无动画
callback: { // 回调函数
onClick: zTreeOnClick, // 单击鼠标事件
asyncSuccess: zTreeOnAsyncSuccess //异步加载成功事件
}
};
$(document).ready(function () {
Inint();
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//初始化加载节点
function Inint(){
$.ajax({
url: 'WebData.aspx',
type: 'post',
dataType: 'json',
async: false,
data: { 'ajaxMethod': 'FirstAnsyData' },
success: function (data) {
zNodes = data;
}
});
};
//单击时获取zTree节点的Id,和value的值
function zTreeOnClick(event, treeId, treeNode, clickFlag) {
treeValue = treeNode.id + "~" + treeNode.name;
alert(treeNode.id + "~" + treeNode.name);
};
function zTreeOnAsyncSuccess(event, treeId, treeNode, msg) {
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div class="content_wrap" style="float:left;width:300px;">
<div class="zTreeDemoBackground left">
<ul id="treeDemo" class="ztree"></ul>
</div>
</div>
</form>
</body>
WebData.aspx页面代码(用来处理数据的页面,有些地方写的比较简单...不是那么严谨)
public partial class WebData : System.Web.UI.Page
{
string strConn = @"Data Source=ANDY-PC\SQLEXPRESS;Initial Catalog=Test;Integrated Security=True";
protected void Page_Load(object sender, EventArgs e)
{
#region
try
{
string ajaxMethod = Request["ajaxMethod"].ToString();//取得前台ajax请求的方法名称
System.Reflection.MethodInfo method = this.GetType().GetMethod(ajaxMethod);
if (method != null)
{
method.Invoke(this, new object[] { });//通过方法名称指向对应的方法
}
}
catch (Exception)
{
throw;
}
finally
{
Response.End();
}
#endregion
}
/// <summary>
/// 异步加载当前节点的子节点
/// </summary>
public void AnsyData()
{
List<object> lsNode = new List<object>();
try
{
int id = int.Parse(Request.Params["id"]);
using (SqlConnection conn = new SqlConnection(strConn))
{
string sql = "select * from OrginTree where OrgParent=" + id + "";
DataTable table = new DataTable();
SqlDataAdapter dt = new SqlDataAdapter(sql, conn);
dt.Fill(table);
lsNode = getList(table);
Response.Write(JsonConvert.SerializeObject(lsNode));
}
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 判断当前节点是否还有子节点
/// </summary>
/// <param name="ParentId">父节点Id</param>
/// <returns>bool类型</returns>
public bool isParentTrue(int ParentId)
{
try
{
using (SqlConnection conn = new SqlConnection(strConn))
{
conn.Open();
string sql = "select * from OrginTree where OrgParent ="+ParentId+"";
DataTable table = new DataTable();
SqlDataAdapter dt = new SqlDataAdapter(sql, conn);
dt.Fill(table);
return table.Rows.Count >=1 ? true :false;
}
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 初始化第一次节点加载
/// </summary>
public void FirstAnsyData()
{
try
{
TableEnjson tbEnjson = new TableEnjson();
List<object> lsNode = new List<object>();
using (SqlConnection conn = new SqlConnection(strConn))
{
conn.Open();
string sql = "select * from OrginTree where OrgParent is null";
DataTable table = new DataTable();
SqlDataAdapter dt = new SqlDataAdapter(sql, conn);
dt.Fill(table);
lsNode = getList(table);
Response.Write(JsonConvert.SerializeObject(lsNode));//用到了Newtonsoft.dll 转化成Json格式
}
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 把数据形式转换成zTree的json数据格式
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public List<object> getList(DataTable table)
{
try
{
List<object> lsNode = new List<object>();
bool isParent = true;
foreach (DataRow row in table.Rows)
{
var ParentId = string.IsNullOrEmpty(row["OrgParent"].ToString()) ? 0 : row["OrgParent"];
if (isParentTrue(int.Parse(row["OrgId"].ToString())))
isParent = true;
else
isParent = false;
var zTreeData = new
{
id = row["OrgId"],
pId = ParentId,
name = row["OrgName"],
isParent = isParent
};
lsNode.Add(zTreeData);
}
return lsNode;
}
catch (Exception)
{
throw;
}
}
}
数据库的格式
CREATE TABLE OrginTree
(
OrgId INT PRIMARY KEY IDENTITY(1,1),
OrgName NVARCHAR(30), //节点的名称
ORgParent INT //父节点的Id
)