在ＡＳＰ中用集合成批操作数据库(二)

二、ＨＴＭＬ的集合属性的应用
　　下面我们结合一个实际的例子，讨论一下如何在ＡＳＰ页面中利用ＨＴＭＬ的集合属性来成批操作数据库。现在我们有一个记录客户电子信箱的ＡＣＣＥＳＳ数据库EMail，其中有一个数据表EmailList，包含CustomerId、CustomerName、CustomerEmail三个字段，分别表示客户编号、客户名称、客户电子信箱。在ＡＳＰ页面SelectId.ASP中，我们采用CheckBox列出所有客户的客户名称（各个CheckBox的值为对应的客户编号），让用户选择给哪些客户发送电子邮件。当用户选择了客户并提交数据后，SendMail.ASP将检索到这些客户的电子信箱，并给这些客户发送电子邮件。具体的信息请参见下面ＡＳＰ程序代码和注释信息。

<html><head><title>所有客户的客户名称</title></head><body>
<p align=center><font style="font-family:宋体;font-size:9pt">
请选择要给哪些客户发送“新年问候”的电子邮件
<form method="POST" action="SendMail.asp">
<%'建立与ACCESS数据库的连接
Set dbConnection = Server.CreateObject("ADODB.Connection")
dbConnection.open "Driver={Microsoft Access Driver (*.mdb)};"&_
"DBQ=C:\inetpub\wwwroot\test\Email.mdb"
'获取所有客户的客户编号、客户名称
Set rsCustomers = Server.CreateObject("ADODB.RecordSet")
rsCustomers.Open "Select CustomerId,CustomerName,CustomerEmail From EmailList",_
dbConnection,1,3,1
'显示所有客户的客户名称
while not rsCustomers.eof
%>
<br><input type="checkbox" name="CustomerId" value="<%=rsCustomers("CustomerId")%>">
<a href="mailto:<%=rsCustomers("CustomerEmail")%>">
<%=rsCustomers("CustomerName")%></a>
<%rsCustomers.MoveNext
wend
rsCustomers.close
set rsCustomers = nothing
dbConnection.close
set dbConnection = nothing
%>
<br><input type="submit" value="给客户发送电子邮件" name="B1"
style="font-family:宋体;font-size:9pt">
</form></body></html>

<html><head><title>给所选择客户发电子邮件</title></head><body>
<p align=center><font style="font-family:宋体;font-size:9pt">
正在给下面客户发送电子邮件
<%'建立与ACCESS数据库的连接
Set dbConnection = Server.CreateObject("ADODB.Connection")
dbConnection.open "Driver={Microsoft Access Driver (*.mdb)};"&_
"DBQ=C:\inetpub\wwwroot\test\Email.mdb"
'获取所选择客户的电子信箱
Set rsCustomers = Server.CreateObject("ADODB.RecordSet")
rsCustomers.Open "Select CustomerName,CustomerEmail From EmailList where CustomerId in ("&_
Request("CustomerId")&")",dbConnection,1,3,1
while not rsCustomers.eof
'给一个客户发电子邮件
Set myMail = CreateObject("CDONTS.NewMail")
myMail.From = "sales@test.com"
myMail.value("Reply-To") = "sales@test.com"
myMail.To = rsCustomers("CustomerEmail")
myMail.Subject = "来自王发军的新年问候"
myMail.BodyFormat = 1
myMail.MailFormat = 1
myMail.Body = "王发军向"&rsCustomers("CustomerName")&"问好！"
myMail.Send
Set myMail = Nothing
%>
<br>给<a href="mailto:<%=rsCustomers("CustomerEmail")%>"><%=rsCustomers("CustomerName")%></a>
发送电子邮件成功！
<%
rsCustomers.MoveNext
wend
rsCustomers.close
set rsCustomers = nothing
dbConnection.close
set dbConnection = nothing
%>
<br>在所选择的客户发送电子邮件完毕！
</body></html>

列出你的所有Session变量

<%@ Language=VBscript %>
<% Option Explicit %>
<%
Response.Write "在你的程序中一共使用了 " & Session.Contents.Count & _
" 个Session变量<P>"
Dim strName, iLoop
For Each strName in Session.Contents
'判断一个Session变量是否为数组
If IsArray(Session(strName)) then
'如果是数组，那么罗列出所有的数组元素内容
For iLoop = LBound(Session(strName)) to UBound(Session(strName))
Response.Write strName & "(" & iLoop & ") - " & _
Session(strName)(iLoop) & "<BR>"
Next
Else
'如果不是数组，那么直接显示
Response.Write strName & " - " & Session.Contents(strName) & "<BR>"
End If
Next
%>

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