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發(fā)一個ASP的ADODB類代碼

反正我現(xiàn)在用這個做了很多站，自己覺得還是滿有用的，所以拿出來和大家分享一下。支持三種數(shù)據(jù)庫連接：MSSQL2000，MSSQL2005，ACCESS
三種方法：
select_table(sql)
表查詢，返回TRUE或FALSE
當(dāng)SQL語句出錯，或空記錄時返回FALSE，否則TRUE
update_table(SQL)
表更新，包括update,delete
成功執(zhí)行返回TRUE，否則返回FALSE，updated為執(zhí)行后影響記錄行數(shù)。
insert_table(sql,table,id_column)
table為表名，id_column為表中自動編號，自增字段。
當(dāng)成功執(zhí)行返回TRUE，否則返回FALSE，指定TABLE，ID_column后，將返回最后添加記錄所產(chǎn)生的自增ID。

select_table()相關(guān)方法Select_page(page,psize)
分頁處理，page為當(dāng)前頁，psize為每頁記錄行數(shù)。
所有操作時，自動檢測數(shù)據(jù)庫鏈接和RS是否打開，執(zhí)行后將自動關(guān)閉數(shù)據(jù)庫鏈接。

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)'每頁20條
   for i=1 to 20
          response.write db.rs("title")'類內(nèi)置rs，不可變
    db.rs.movenext
   if db.rs.eof then exit for
   next
end if
db.rsPage = 總頁數(shù)，db.nowPage= 經(jīng)過處理后當(dāng)前頁，db.rsCounts數(shù)總記錄數(shù)量。

if db.update_table("delete from news where ispass=1") then'update同樣
    response.write "共刪除"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為"db.Insertd

在頁面最尾可輸出db.readCounts 為查詢數(shù)據(jù)庫次數(shù)。
--------------------------------------------
本類好處就是你不必?fù)?dān)心忘記關(guān)閉數(shù)據(jù)庫鏈接，不用頻繁set rs = server.recordset("adodb.recordset"),也不用set rs = nothing
缺點就是翻頁用的傳統(tǒng)方式。rs.absolutepage = rs.pagesize
----------------------------------------------------------
%
'/******kshop******/
'        adodb_class.asp        數(shù)據(jù)庫操作類

'        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'數(shù)據(jù)庫類型access,sql2000,sql2005三個值之一
        dim SqlDbName,SqlUser,SqlPass,SqlServer
        dim SqlAccess
        dim Selectd,Insertd,Updated
        dim rsCounts,rsPage,readCounts,nowPage '記錄集總數(shù)/頁數(shù) 查詢次數(shù)

        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
        '********打開數(shù)據(jù)庫鏈接******************
        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 "數(shù)據(jù)庫鏈接失敗br>sqlstring = " + connstr
                                Response.End()
                                err.clear
                        end if
        End Sub
        '**********結(jié)束/查詢構(gòu)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
        '分頁處理
        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
        '更新記錄
        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
        '輸入：insert SQL語句，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
                                '獲得最后增加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
        '關(guān)閉數(shù)據(jù)庫鏈接
        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
        '**********釋放類************
        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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