ADO 排序

我们可以使用SQL来规定如何对记录集中的数据进行排序。

实例

如何根据指定字段名对数据进行排序

<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 Companyname, Contactname FROM Customers ORDER BY CompanyName"
rs.Open sql, conn
%>

<table border="1" width="100%">
<tr>
<%for each x in rs.Fields
    response.write("<th>" & x.name & "</th>")
next%>
</tr>
<%do until rs.EOF%>
    <tr>
    <%for each x in rs.Fields%>
       <td><%Response.Write(x.value)%></td>
    <%next
    rs.MoveNext%>
    </tr>
<%loop
rs.close
conn.close
%>
</table>

</body>
</html>

根据指定的字段名处对记录进行降序排序

如何根据指定字段名对数据进行排序

<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 Companyname, Contactname FROM Customers ORDER BY CompanyName DESC"
rs.Open sql, conn
%>

<table border="1" width="100%">
<tr>
<%for each x in rs.Fields
    response.write("<th>" & x.name & "</th>")
next%>
</tr>
<%do until rs.EOF%>
    <tr>
    <%for each x in rs.Fields%>
       <td><%Response.Write(x.value)%> </td>
    <%next
    rs.MoveNext%>
    </tr>
<%loop
rs.close
conn.close
%>
</table>

</body>
</html>

让用户来选择根据哪列进行排序

<html>
<body>

<table border="1" width="100%" bgcolor="#fff5ee">
<tr>
<th align="left" bgcolor="#b0c4de">
<a href="/example/adoe/demo_adoe_sort_3.asp?sort=companyname">Company</a>
</th>
<th align="left" bgcolor="#b0c4de">
<a href="/example/adoe/demo_adoe_sort_3.asp?sort=contactname">Contact</a>
</th>
</tr>
<%
if request.querystring("sort")<>"" then
   sort=request.querystring("sort")
else
   sort="companyname"
end if

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 Companyname,Contactname FROM Customers ORDER BY " & sort
rs.Open sql,conn

do until rs.EOF
   response.write("<tr>")
   for each x in rs.Fields
     response.write("<td>" & x.value & "</td>")
   next
   rs.MoveNext
   response.write("</tr>")
loop
rs.close
conn.close
%>
</table>

</body>
</html>

对数据进行排序

我们希望显示 "Customers" 表中的"Companyname"和"Contactname"字段，并根据"Companyname"进行排序（请记得用.asp为后缀保存）：

<html>
<body>

<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"

set rs = Server.CreateObject("ADODB.recordset")
sql="SELECT Companyname, Contactname FROM
Customers ORDER BY CompanyName"
rs.Open sql, conn
%>

<table border="1" width="100%">
  <tr>
  <%for each x in rs.Fields
    response.write("<th>" & x.name & "</th>")
  next%>
  </tr>
  <%do until rs.EOF%>
    <tr>
    <%for each x in rs.Fields%>
      <td><%Response.Write(x.value)%></td>
    <%next
    rs.MoveNext%>
    </tr>
  <%loop
  rs.close
  conn.close%>
</table>

</body>
</html>