一直想整下,老是忘记 

 

dtree的下载和事例 http://www.open-open.com/ajax/ajax20080721113203.htm

-------------------------------------------js部分------------------------------------------------------

<script src="js/jquery-1.4.2.js" type="text/javascript"></script>

<script type="text/javascript" src="../dtree/dtree.js"></script>

<link type="text/css" href="../dtree/dtree.css" rel="Stylesheet" />

<script type="text/javascript">
  $(function(){
    d=new dTree('d');
    var inhtml="";
    $.getJSON(
      "do/GetJcdw.ashx?"+Math.random(),
      function(data) {

        $.each(data, function(k, v) {
        var ddwid=data[k].dwid;
        var dpid=data[k].pid;
        var ddwname=data[k].dwname;
        var bz=data[k].bz;
          d.add(ddwid,dpid,ddwname,"javascript:clickfun('"+ddwid+"','"+dpid+"','"+ddwname+"','"+bz+"')");

        });
      document.getElementById("divtree").innerHTML=d;
      }

    );
})

-----------------------------------------------------html部分-------------------------------------

<div class="dtree">
<p>
&nbsp;&nbsp; &nbsp;&nbsp;<a href="javascript: d.openAll();">打开所有</a> &nbsp;|&nbsp;<a
href="javascript: d.closeAll();">关闭所有</a></p>

<div id="divtree">
</div>
</div>

----------------------------------------------------无限级部分-----------------------------------

-----------GetJcdw.ashx一般处理处理程序,返回json代码

 

public void ProcessRequest (HttpContext context) {

context.Response.ContentType = "text/plain";
string parenetid = "0";
string tes = GetTrees(parenetid);
string flag = " {\"dwid\":\"0\",\"pid\":\"-1\",\"dwname\":\"点位类型\"} ";
string result = "";
if (tes == "")
{
result = "[" + flag + "]";
}
else
{
result = "[" + flag + "," + tes.Substring(0, tes.Length - 1) + "]";
}
context.Response.Write(result);
}

 

string tress = "";
/// <summary>
/// 返回树的字符串
/// </summary>
/// <returns></returns>
public string GetTrees(string parentid)
{

//无限级数据库可以为1个表中的主id和关联id关联

//id  name   关联id

//  1  name 1    0 

//  2 name2      1

// 3 name 3      1

//1为2,3 id的上一级id

System.Data.DataSet ds = GetListByParents(parentid);
if (ds != null)
{
System.Data.DataTable dt = ds.Tables[0];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{

string ptid = dt.Rows[i]["parentid"].ToString();
string did = dt.Rows[i]["dwid"].ToString();
if (jcdwbll.ExitNodes(did, cityid))
{
tress += "{ \"dwid\":\"" + did + "\",\"pid\":\"" + parentid + "\",\"dwname\":\"" + dt.Rows[i]["DWNAME"] + "\",\"bz\":\"" + dt.Rows[i]["bz"] + "\"},";
GetTrees(did);
}
}
}

}

return tress;

}

-----------前台js,html和ajax的ashx大概代码----记录下