<!-- 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:2004-09-19 22:40 环境:ASP+ACCESS'//----------List表定义 'Create Table List(ID AUTOINCREMENT,ParentID long,Title Text(50),Url Text(50),Flag bit,ChildNum Long,Target Text(10))'----------------------------><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><!-- 有人问同一页面不同链接的不同风格怎么做,就是这里啦 --><!-- 添加节点表单 --><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;"><!-- 有人问用下拉列表改变文本框的值怎么做,就是这里了 --> <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" οnclick="JavaScript:load.style.display='none'" value="取消"></TD></TR></FORM></TABLE></div><!-- 添加节点表单结束 --><%'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=# οnclick='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='#' οnclick='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 NextEnd 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 IFEnd 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 IfEnd Function%><SCRIPT LANGUAGE="JavaScript"><!--function add(ID){ form1.action='List.asp?action=Add'; form1.ParentID.value=ID; load.style.left=(document.body.scrollWidth-300)/2; load.style.top=(document.body.scrollHeight-100)/2; load.style.display="";//有人问控制层的隐显怎么做,就是这里啦}function Del(ID){if(confirm('删除此节点将使此节点的子节点向上递进一层/n确定要继续吗?')) {window.location.href='List.asp?Action=Del&Id='+ID;}//有人问删除确认怎么做,就是这里啦}//--></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
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