错误类型：
Microsoft OLE DB Provider for ODBC Drivers (0x80040E14)
[Microsoft][ODBC Microsoft Access Driver] 语法错误 (操作符丢失) 在查询表达式 'ID=' 中。
/test/addok.asp, 第 20 行
文件:addok.asp:
1 <!--#include file="connections/conn.asp"-->
2 <%
3 function encodestr(str)
4 dim i
5 str=trim(str)
6 str=replace(str,"<","<")
7 str=replace(str,">",">")
8 str=replace(str,"'","""")
9 str=replace(str,vbCrLf&vbCrlf,"</p><p>")
10 str=replace(str,vbCrLf,"<br>")
11 encodestr=replace(str," "," ")
12 end function
13
14 title=encodestr(request.form("title"))
15 news_content=replace(trim(request.form("news_content")),"'","''")
16 guestcontent=encodestr(request.form("guestcontent"))
17 classname=Request.Form("classname")
18 if session("maxid")="" then session("maxid")=0
19 sql="update content set title='"&title&"',guestcontent='"&guestcontent&"',news_content='"&news_content&"',classname='"&classname&"' where ID=" & session("maxid")
20 conn.execute(sql)
21 conn.close
22 set conn=nothing
23 %>
參考答案:肯定是session("maxid")空值了
18行写得不够严谨，改一下：
if isnull(session("maxid")) or session("maxid")="" then session("maxid")=0
或者这样：
if session("maxid")&""="" then session("maxid")=0
