把下面代码保存为Asp_XML.asp运行即可:
<%
’By Dicky 2005-03-22 21:52:18 AM QQ:25941 E-mail:AppleBBS@GMail.Com
Const IsSql = 1 ’定义数据库类型为SQL Server
Call OpenConn(Conn) ’打开数据库连接

Dim Rs,Sql
Set Rs = Server.CreateObject("ADODB.RecordSet")
Sql = "SELECT * FROM Products ORDER BY ProductName"
Rs.Open Sql,Conn,1,1 ’以只读方式查询数据记录
If Rs.Eof Then
Response.Write "Sorry,no record!" ’如果没有记录
Else
Dim objXMLDOM, objRootNode, objNode
Set objXMLDOM = Server.CreateObject("MSXML2.DOMDocument") ’创建XML文档对象
Set objRootNode = objXMLDOM.createElement("xml") ’创建根节点
objXMLDOM.documentElement = objRootNode

Do While Not Rs.Eof ’循环出所有记录
’ Response.Write Rs("ProductName") &"<br>"
Set objRowNode = objXMLDOM.createElement("row") ’创建父节点
Set objNode = objXMLDOM.createElement("ProductName") ’创建子节点
objNode.text = Rs("ProductName")
objRowNode.appendChild(objNode)

Set objNode = objXMLDOM.createElement("UnitPrice")
objNode.text = Rs("UnitPrice")
objRowNode.appendChild(objNode)

Set objNode = objXMLDOM.createElement("UnitsInStock")
objNode.text = Rs("UnitsInStock")
objRowNode.appendChild(objNode)

objRootNode.appendChild(objRowNode)
Rs.MoveNext:Loop ’循环结束

objXMLDOM.Save "D:MyXMLDoc.xml" ’写入XML文件 可以用变量让用户在页面上自定义文件名
Response.Write "<script>alert(’恭喜，写入XML文件成功！’);</script>"
Set objNode = Nothing ’销毁对象
Set objRowNode = Nothing ’销毁对象
Set objRootNode = Nothing ’销毁对象
End If
Rs.Close
Set Rs = Nothing

Call CloseConn() ’关闭数据库连接

Function OpenConn(Conn) ’打开数据库连接
Dim ConnStr
If IsSql = 1 Then ’如果是SQL Server数据库
’SQL Server数据库连接参数:用户名、用户密码、数据库名、连接名（本地用local，外地用IP）
Dim SqlUsername,SqlPassword,SqlDatabaseName,SqlLocalName
SqlUsername = "sa"
SqlPassword = ""
SqlDatabaseName = "Northwind"
SqlLocalName = "(local)"
ConnStr = "Provider = Sqloledb; User ID = " & SqlUsername & ";

Password = " & SqlPassword & "; Initial Catalog = " & SqlDatabaseName & ";

Data Source = " & SqlLocalName & ";"
Else ’如果是Access数据库
Dim Db
’第一次使用请修改本处数据库地址并相应修改数据库名称，如将Dicky.mdb修改为Dicky.asp(防止恶意下载Access数据库)
Db = "Dicky.mdb"
ConnStr = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source =

" & Server.MapPath(Db)
End If
On Error Resume Next
Set Conn = Server.CreateObject("ADODB.Connection")
Conn.Open ConnStr
If Err Then
’ Err.Clear
Set Conn = Nothing
Response.Write "数据库连接出错，请检查连接字串。"
Response.End
End If
Set Rs = Server.CreateObject("Adodb.RecordSet")
End Function

Function CloseConn() ’关闭数据库连接
Conn.Close
Set Conn = Nothing
End Function
%>