无限级分类树型节点演示1

[摘要]<!-- 看到论坛里有人发了一个树型菜单,需者甚众,看了一下演示, 似乎不难实现,趁着周六没事,便也写了一个出来理论上支持无限级分类,发上来与大家分享!! '-------------------------- 名称:无限级分类树型菜单演示作者:y0h 最后更新:2004-09-...

<style Type=Text/Css>
body,td{font-size:13px;}
a:link { color: #442200; text-decoration: none}
a:visited { color: #444400; text-decoration: none}
a:hover { color: #442200; text-decoration: underline overline; background-color: #FFFF00}
a.link1:link { color: #FF0000; text-decoration:none}
a.link1:visited { color: #FF0000; text-decoration: none}
a.link1:hover { color: #FF0000; text-decoration: none; background-color: #eeeeee}
</Style>



<div align="center" id=load style="display:none;position: absolute;">
<TABLE bgcolor=ffffee width=250 Style="border:1px solid #dd8888;"><FORM METHOD=POST ACTION="" name=form1>
<tr><td align="center">添加节点</td></tr>
<TR><TD align="center">
<INPUT TYPE="hidden" Name="ParentID">
标题:<INPUT TYPE="text" NAME="Title"><BR>
链接:<INPUT TYPE="text" NAME="Url"><BR>
目标:<INPUT TYPE="text" NAME="Target" Style="width:70px">
<SELECT NAME="" Style="width:75px" OnChange="javascript:Target.value=this.options[this.selectedIndex].value;">

<option value="">Default</option>
<option value="Right">Right</option>
<option value="_black">_black</option>
<option value="_Top">_Top</option>
<option value="_parent">_parent</option>
<option value="_self">_self</option>
</SELECT>
</td></tr><tr><td align="center">
<INPUT TYPE="submit" Name="提交" value="提交">
<INPUT TYPE="Button" onclick="javascript:load.style.display='none'" value="取消">
</TD>
</TR></FORM>
</TABLE>
</div>


<%
'连接数据库
set conn=server.createobject("ADODB.Connection")
conn.open "provider=microsoft.jet.oledb.4.0;data source="&server.mappath("File.mdb")

'//----------操作分支
Action=Request("Action")
Select Case Action
Case "Add":If Request("ParentID")<>"" Then Add
Case "Del": Del
Case "Open":Open
Case Else:
End Select
'//----------显示列表
Public List
Set Rs=Conn.Execute("Select * From [List]")
If Not Rs.Eof Then
List =Rs.GetRows
Max=Conn.Execute("Select Count(ParentID) From List Where ParentID=0")(0)
Set Rs=Nothing
Set Conn=Nothing
CheckList 0,Max,""
Else
Set Rs=Nothing
Set Conn=Nothing
End If
Response.Write "<a href=# onclick='javascript:form1.action=""List.asp?action=Add"";form1.ParentID.value=0;load.style.left=(document.body.scrollWidth-300)/2;load.style.top=(document.body.scrollHeight)/2;load.style.display="""";'>添加根</a><BR>"
'//------------显示列表函数
FuncTion CheckList(ParentID,Cs,Str1)
Dim j
j=0
For i=0 To Ubound(List,2)
If List(1,i)=ParentID Then
Response.write(Str1)
If j<Cs-1 Then Str2="├" Else Str2="└"
If List(5,i)>0 Then Str2="<a class=Link1 href='List.asp?action=Open&Id="&List(0,i)&"'>"&Str2&"</a>"
If List(5,i)>0 And List(4,i)=False Then Str2="<b>"&Str2&"</b>"
Response.Write(Str2)

Response.Write "<a Href='"&List(3,i)&"' target='"&List(6,i)&"'>"&List(2,i)&"</a>"&VBcrlf
'添加节点链接
Response.Write "<a title='添加"&List(2,i)&"的子节点' href='#' onclick='javascript:add("&List(0,i)&");'>添加</a>"&Vbcrlf
Response.Write "<a Title=""删除此节点"&VBCRLF&"此节点的子节点将向上递进一层!"" href='javascript:Del("&List(0,i)&");'>删除</a><BR>"
If List(4,i)=True Then
If j<Cs-1 Then CheckList List(0,i),List(5,i),Str1&"┆" Else CheckList List(0,i),List(5,i),Str1&""'关键所在,递归调用
End If
j=j+1
End IF
Next
End Function

'//-----------添加函数
Function Add
Parent=CLng(Request("ParentID"))
Title=Replace(Request("Title"),"'","''")
Url=Replace(Request("URL"),"'","''")
Target=Replace(Request("Target"),"'","''")
If Title="" Or Url="" Then
Response.Write "至少有一个必须参数没有指定值 <a href=List.asp>返回</a>"
Response.End
Exit Function
End If
Sql="Insert Into List (ParentID,Title,Url,Target) Values ("&Parent&",'"&Title&"','"&Url&"',' "&Target&"')"
Conn.Execute(Sql)
If Parent<>0 Then
Sql="Update List Set ChildNum=ChildNum+1 Where ID="&Parent
Conn.Execute(Sql)
End IF
End Function

'//-----切换节点状态
Function Open
Sql="Update List Set Flag=Not Flag Where ID="&Clng(Request("Id"))
Conn.Execute(Sql)
End Function
'//-----------删除节点
Function Del
On Error Resume Next
Id=Clng(Request("ID"))
ParentID=Conn.Execute("Select ParentID From List Where ID="&ID)(0)
Num=Conn.Execute("Select Count(ID) From List Where parentID="&ID)(0)
Conn.Execute("Update List Set ChildNum=ChildNum-1+"&Num&" Where ID="&ParentID)
Conn.Execute("Update List Set ParentID="&ParentID&" Where ID in (Select ID From List Where ParentID="&ID&")")
Conn.Execute("Delete From List Where ID="&ID)
If Err.Number<>0 Then
Response.Write "您做的操作无效,可能是该项已经删除!! <a href=List.asp>返回</a>"
Response.End
End If
End Function
%>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>

没有做美化,没有加其它功能,需要者可以自己改好了!

Create Table List(ID AUTOINCREMENT,ParentID long,Title Text(50),Url Text(50),Flag bit,ChildNum Long,Target Text(10))

直接在查询里执行就可以得到List表!!

下面是对表的说明

Id 自动编号
ParentID 长整形
Title 文本
Url 文本
Flag 布尔
ChildNum 长整形
Target 文本,允许空符串

……

标签:无限级分类树型节点演示