发一个ASP的ADODB类代码

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反正我现在用这个做了很多站，自己觉得还是满有用的，所以拿出来和大家分享一下。支持三种数据库连接：MSSQL2000，MSSQL2005，ACCESS
三种方法：
select_table(sql)
表查询，返回TRUE或FALSE
当SQL语句出错，或空记录时返回FALSE，否则TRUE
update_table(SQL)
表更新，包括update,delete
成功执行返回TRUE，否则返回FALSE，updated为执行后影响记录行数。
insert_table(sql,table,id_column)
table为表名，id_column为表中自动编号，自增字段。
当成功执行返回TRUE，否则返回FALSE，指定TABLE，ID_column后，将返回最后添加记录所产生的自增ID。

select_table()相关方法Select_page(page,psize)
分页处理，page为当前页，psize为每页记录行数。
所有操作时，自动检测数据库链接和RS是否打开，执行后将自动关闭数据库链接。

示例：
set db = new adodb_class
if db.select_table("select * from news order by id desc") then
page = request("page")
Select_page(page,20)'每页20条
for i=1 to 20
response.write db.rs("title")'类内置rs，不可变
db.rs.movenext
if db.rs.eof then exit for
next
end if
db.rsPage = 总页数，db.nowPage= 经过处理后当前页，db.rsCounts数总记录数量。

if db.update_table("delete from news where ispass=1") then'update同样
response.write "共删除"&db.updated&"行"
end if

call db.insert_table("insert into news (title,content) values ('"&title&"','"&content&"')","news","id")
response.write "最后添加ID为"&db.Insertd

在页面最尾可输出db.readCounts 为查询数据库次数。
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本类好处就是你不必担心忘记关闭数据库链接，不用频繁set rs = server.recordset("adodb.recordset"),也不用set rs = nothing
缺点就是翻页用的传统方式。rs.absolutepage = rs.pagesize
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<%
'/******kshop******/
' adodb_class.asp 数据库操作类

' Version 1.0
' Copyright [email]simple_1982@hotmail.com[/email]
' E-mail [email]xsg2005@163.com[/email]
'/*****************/
class adodb_class
dim conn,connstr,rs
dim dbclass'数据库类型access,sql2000,sql2005三个值之一
dim SqlDbName,SqlUser,SqlPass,SqlServer
dim SqlAccess
dim Selectd,Insertd,Updated
dim rsCounts,rsPage,readCounts,nowPage '记录集 总数/页数 查询次数

Private Sub Class_Initialize()
SqlDbName = ""
SqlUser = ""
SqlPass = ""
SqlServer = ""
SqlAccess = "/simple_date/simple_xiehui.mdb"
rsCounts = 0:rsPage = 1:readCounts = 0:nowPage = 1
Call OpenConn("access")

selectd = 0
Insertd = 0
Updated = 0
End Sub
'********打开数据库链接******************
Private Sub AccessConn()
connstr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & server.mappath(SqlAccess) &";Persist Security Info=False"
End Sub
Private Sub Sql2kConn()
connstr = "driver={SQL server};server="&SqlServer&";uid="&SqlUser&";pwd="&SqlPass&";database="&SqlDbName
End Sub
Private Sub Sql2k05Conn()
connstr="Provider=SQLNCLI.1;Password="&SqlPass&";User ID="&SqlUser&";Initial Catalog="&SqlDbName&";Data Source="&SqlServer
End Sub
Private Sub OpenConn(db_class)
dbclass = db_class
select case db_class
case "access":call AccessConn()
case "sql2000":call Sql2kConn()
case "sql2005":call Sql2k05Conn()
end select
on error resume next
set conn = server.CreateObject("adodb.Connection")
conn.open connstr
if err then
Response.write "数据库链接失败<br>sqlstring = " + connstr
Response.End()
err.clear
end if
End Sub
'**********结束/查询构造*************
Public Function Select_Table(sql)
if not not isempty(conn) or isnull(conn) then
call OpenConn(dbclass)
elseif conn.state = 0 then
call OpenConn(dbclass)
end if
on error resume next
Set rs = Server.CreateObject("adodb.recordset")
rs.open sql,conn,1,1
if err then
Select_Table = False
rs.close
exit Function
err.clear
End If
If rs.eof and rs.bof then
rs.close
Select_Table = false
Else
Select_Table = true
End If
readCounts = readCounts + 1
End Function
'分页处理
Public Function Select_page(page,psize)
if isnull(page) or page = "" then page = 1
if page < 1 then page = 1
if rs.state = 1 then
if not rs.eof then
rs.pagesize = psize
rsPage = rs.pagecount
rsCounts = rs.recordcount
if int(page) > Int(rsPage) then page = rsPage
rs.absolutepage = page:nowPage = page
end if
end if
End Function
'更新记录
Public Function Update_Table(Sql)
if not isempty(conn) or isnull(conn) then
call OpenConn(dbclass)
elseif conn.state = 0 then
call OpenConn(dbclass)
end if
on error resume next
if Sql <> "" then
conn.Execute Sql,Updated
if err then
Update_Table = false
err.clear
else
Update_Table = true
end if
Else
Update_Table = false
end if
conn.close
Set conn = nothing
End Function
'增加
'输入：insert SQL语句，表名，自增字段
Public Function Insert_Table(sql,table,id_column)
if not isempty(conn) or isnull(conn) then
call OpenConn(dbclass)
elseif conn.state = 0 then
call OpenConn(dbclass)
end if
on error resume next
if sql <> "" then
conn.Execute(sql)
if err then
Insert_Table = false:err.clear
else
Insert_Table = true
end if
'获得最后增加ID
if table <> "" and id_column <> "" then
Set ds = conn.Execute("select "&id_column&" from "&table&" order by "&id_column&" desc")
end if
if err then
Insertd = 0:err.clear
else Insertd = ds(0)
end if
Set ds = nothing
closed()
else
Insert_Table = false
end if
End Function
'关闭数据库链接
Public Function closed()
if not isempty(rs) and not isnull(rs) then
if rs.state = 1 then
rs.close
end if
end if
rsCounts = 0:rsPage = 1:nowPage = 1
end function
'**********释放类************
Private Sub Class_Terminate()
readCounts = 0:rsCounts = 0:rsPage = 0
if not isempty(conn) and not isnull(conn) then
if conn.state = 1 then
conn.close
end if
Set conn = nothing
end if

if not isempty(rs) then
if not isnull(rs) then
if rs.state=1 then
rs.close
end if
set rs=nothing
end if
end if
End Sub
End Class
%>

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