开发学院WEB开发ASP 下拉框连动的小例子(数据库版) 阅读

下拉框连动的小例子(数据库版)

 2000-11-03 10:55:35 来源:WEB开发网   
核心提示:asp文件:<%@ Language=VBScript %><%Option Explicit%><html><head><title>List</title><meta http-equiv="Content-Type"
asp文件:
<%@ Language=VBScript %>
<%Option Explicit%>
<html>
<head>
<title>List</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<%
dim conn
dim rs
dim sql
dim count
dim rs1
dim sql1


set conn = server.CreateObject ("adodb.connection")
conn.Open "test","sa",""


sql = "select * from district order by locationid asc"
set rs = conn.execute(sql)
%>
<script language = "javaScript">
var onecount;
onecount=0;
subcat = new Array();
    <%
    count = 0
    do while not rs.eof
    %>
subcat[<%=count%>] = new Array("<%= trim(rs("districtname"))%>","<%= trim(rs("locationid"))%>","<%= trim(rs("districtid"))%>");
    <%
    count = count + 1
    rs.movenext
    loop
    rs.close
    set rs=nothing
    %>
onecount=<%=count%>;

function changelocation(locationid)
  {
  document.myform.smalllocation.length = 0;

  var locationid=locationid;
  var i;
  document.myform.smalllocation.options[0] = new Option('====所有地区====','');
  for (i=0;i < onecount; i++)
    {
      if (subcat[i][1] == locationid)
      {
        document.myform.smalllocation.options[document.myform.smalllocation.length] = new Option(subcat[i][0], subcat[i][2]);
      }    
    }
    
  }  
</script>
</head>
<body>
<form name="myform" method="post">
  <select name="biglocation" onChange="changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value)">
    <%
    
    sql1 = "select * from location order by locationname asc"
    set rs1 = conn.Execute (sql1)
    do while not rs1.eof
    %>
    <option value="<%=trim(rs1("locationid"))%>"><%=trim(rs1("locationname"))%></option>
    <%
    rs1.movenext
    loop
    rs1.close
    set rs1 = nothing
    conn.Close
    set conn = nothing
    %>
  </select>
  <select name="smalllocation">
    <option selected value="">==所有地区==</option>
  </select>
</form>
<script LANGUAGE="Javascript">
  changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value);
</script>
</body>
</html>


数据库:
create table location
(

locationid char(2) not null PRimary key,
locationname char(50) not null

)


create table district
(

districtid char(3) not null primary key,
districtname char(50) not null,
locationid char(2) not null
)

Tags:下拉 连动 例子

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