ADO实例让用户来选择筛选标准
<html>
<body>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open(Server.Mappath("/db/northwind.mdb"))
set rs=Server.CreateObject("ADODB.recordset")
sql="SELECT DISTINCT Country FROM Customers ORDER BY Country"
rs.Open sql,conn
country=request.form("country")
%>
<form method="post">
Choose Country <select name="country">
<% do until rs.EOF
response.write("<option")
if rs.fields("country")=country then
response.write(" selected")
end if
response.write(">")
response.write(rs.fields("Country"))
rs.MoveNext
loop
rs.Close
set rs=Nothing %>
</select>
<input type="submit" value="Show customers">
</form>
<%
if country<>"" then
sql="SELECT Companyname,Contactname,Country FROM Customers WHERE country='" & country & "'"
set rs=Server.CreateObject("ADODB.Recordset")
rs.Open sql,conn
%>
<table width="100%" cellspacing="0" cellpadding="2" border="1">
<tr>
<th>Companyname</th>
<th>Contactname</th>
<th>Country</th>
</tr>
<%
do until rs.EOF
response.write("<tr>")
response.write("<td>" & rs.fields("companyname") & "</td>")
response.write("<td>" & rs.fields("contactname") & "</td>")
response.write("<td>" & rs.fields("country") & "</td>")
response.write("</tr>")
rs.MoveNext
loop
rs.close
conn.Close
set rs=Nothing
set conn=Nothing%>
</table>
<% end if %>
</body>
</html>
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