如何实现树形结构？

csdn上搜索的好象都是固定的，不是用数据库形式的，但假如数据多了就不知怎么办了，可以用xml,javascript,+asp/jsp，但还没有成功，想想办法，一起努力吧

解决方案 »

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我要一个,学习学习,[email protected]
Thanks!
15seconds.com英文的，搜索tree。
能不能也给我一份？谢谢！！！
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我也来个
mail:[email protected]
http://www.fangfa.net/temp/tv102.exeTreeView类，1.02版！
2.0版制作中
我也来个
[email protected]
谢谢！
me!me! i wanna get some one..
email:[email protected]
<head>
<link rel="stylesheet" type="text/css" href="style.css"><title>分层</title></head>
<base target="main.asp">
<body topmargin="0" leftmargin="0" bgcolor="#7285CF"><table border="0" cellpadding="0" cellspacing="0" width="100%" height="100%">
  <tr><td height="20"></td></tr>
  <tr>
    <td width="100%" height="281" valign="top">
<DIV id=cItem>
<%
  I=0'取第一层内容
  sql = "Select * from first order by id"
  Set Rs = Conn.Execute(sql)
  if not rs.eof then
    do while not rs.eof
'判断该记录是否为终结点
     SQL2 = "Select * From second Where fcode='" & Rs("code")  & "' order by id"
Set Rs2 = Conn.Execute(SQL2)
%>
<table border="0" cellpadding="0" cellspacing="0" width="100%" bgcolor="#DEE2F3">
  <tr>
  <%if Rs2.eof then%>
   <td width="5%"><p align="right"><img src="Images/end.gif" align="absbottom" width="9" height="9"></p></td>
   <td width="95%" style="cursor:Hand" valign="top"><a href="main.asp?code=<%=Rs("code")%>" target=main><% = Rs("name") %></a></td>
      <%response.write "</tr></table>"%>
   <%
   else
   %>
   <td width="5%">
      <p align="right"><img src="Images/Close.gif" id="Out1<%=I+1%>" style="cursor:Hand" class=cItem align="absbottom" width="9" height="9"></p>
    </td>
    <td width="95%" id="Out1<%=I+1%>"><% = Rs("name") %></td></tr></table>

<div id="Out1<%=I+1%>a" style="display:None">
<%
'取第二层内容
    J=0
  do while not Rs2.eof
'判断该记录是否为终结点
     SQL3 = "Select * From third Where scode='" & Rs2("code")  & "' order by id"
Set Rs3 = Conn.Execute(SQL3)
%>
<table border="0" cellpadding="0" cellspacing="0" width="100%" bgcolor="#DEE2F3">
  <tr>
  <%if Rs3.eof then%>
   <td width="10%"><p align="right"><img src="Images/end.gif" align="absbottom" width="9" height="9"></p></td>
   <td width="90%" style="cursor:Hand"><a href="main.asp?code=<%=Rs2("code")%>" target=main><% = Rs2("name") %></a></td>
      <%response.write "</tr></table>"%>
  <%
  else
  %>
    <td width="10%">
     <p align="right"><img src="Images/Close.gif" id="Out2<%=I%><%=J+1%>" style="cursor:Hand" class=cItem align="absbottom" width="9" height="9"></p>
    </td>
    <td width="95%" id="Out2<%=I%><%=J+1%>"><% = Rs2("name") %></td></tr></table>
<div id="Out2<%=I%><%=J+1%>a" style="display:None">
<%do while not Rs3.eof%>
<table border="0" cellpadding="0" cellspacing="0" width="100%" bgcolor="#DEE2F3">
  <tr>
   <td width="15%"><p align="right"><img src="Images/end.gif" align="absbottom" width="9" height="9"></p></td>
   <td width="85%" style="cursor:Hand"><a href="main.asp?code=<%=Rs3("code")%>" target=main><% = Rs3("name") %></a></td>
  </tr>
</table>
<%
  Rs3.movenext
  loop
%></div>
<%
   End if
   J=J+1
   Rs2.movenext
   loop
%>
</div>
<%
  end if
  I=I+1
  Rs.movenext
  loop
end if
  Conn.Close
%>
</div>

<script>
</script></body>
</html>
<html>
<body>
<table>
<tr><td>1</td><td>树木1</td><tr>
<tr><td>2</td><td>树木2</td><tr>
<tr style="cursor:hand;"  ><td  valign=top>3</td><td id="test"><div onclick='opentree()'>树木3</div></td><tr>
</table>
</body>
</html>
<script language="javascript">
function opentree()
{

document.all.test.innerHTML = "<table><tr><td onclick='javascript:closetree()'>树木3</td><tr><tr><td>1</td><td>叶子</td><tr></table>"
}
function closetree()
{
document.all.test.innerHTML ="<div onclick='opentree()'>树木3</div>";
}
</script>这段代码简单了一点，大致思路就是这样，通过innerHTML代替就可以实现了，当然这是最简单的方法。你可以自己试试看这段代码，我刚写的一棵树也是这么做的！