ASP教程：自己写的数据库操作类_ASP教程

2024-05-04 11:04:07

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推荐：谈用asp编写类似搜索引擎功能的代码
首先建一个access 数据库，库中有一个URLINDEX表，其中URL和Keywords字段分别添加了索引，如下：以下为引用的内容：URL 文本 (索引

数据库操作类在网上一搜一大把，我这并不比那些好，只是是自己写的，用着更习惯。所以我这个类没有什么特别的地方，只是自己用着习惯罢了，至于效率等方面，欢迎赐教！！

程序代码：

以下为引用的内容：
<%
Class dbClass
'-------------------------------------------------------------------------
'变量说明
'conn-----------connection对象
'strsql---------执行查询的语句
'vTbName--------查询分页的表名
'vPKey----------查询分页的表的主键
'vPgFields------查询分页要显示的字段
'vPgSize--------查询分页每页显示的记录数
'vCurrPg--------查询分页显示的当前页
'vConditions----查询分页的条件
'vOrderBy-------查询分页的排序
'-------------------------------------------------------------------------
private conn,strsql,vTbName,vPKey,vPgFields,vPgSize,vCurrPg,vConditions,vOrderBy
'类的初始化
private Sub Class_Initialize()
'当是MS Sql数据库时设置以下两个变量
'dim dbServer '数据库服务器的名称或ip地址
'dim dbname '数据库的名字
dim dbPath '若是Access数据库，此处设置其路径
dim dbUser '数据库的登录用户名
dim dbPass '数据库的登录密码
dim connstr
dbPath = "/testasp/data/data.mdb" '设置数据库路径
dbUser = "admin"
dbPass = "123456"
'若是access,并且有密码
connstr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath(dbPath) &_
";User ID=" & dbUser & ";Password=;Jet OLEDB:Database Password=" & dbPass
'若是access，并且没有密码
'connstr = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = " & Server.MapPath(dbPath)
'若是ms-sql数据库
'connstr = "Provider = Sqloledb; User ID = " & dbUser & "; Password = " & dbPass &_
' "; Initial Catalog = " & dbname & "; Data Source = " & dbServer
on error resume next
set conn=server.CreateObject("adodb.connection")
conn.open connstr
errMsg "连接数据库"
End Sub
'类结束
Private Sub Class_terminate()
conn.close
set conn=nothing
End Sub
'-------------------------------------------------------------------------
'给类的变量设置值
'-------------------------------------------------------------------------
'设置sql语句
Public Property Let sqlStr(Byval Values)
strsql=Values
End Property
'设置查询分页的表名
public property let tbName(Byval Values)
vTbName=Values
end property
'--------------------------------------------------------
'设置查询分页的表的主键
public property let pKey(ByVal Values)
vPKey=Values
end property
'--------------------------------------------------------
'设置显示的字段
public property let pgFields(ByVal Values)
vPgFields=Values
end property
'--------------------------------------------------------
'设置每页显示的记录数
public property let pgSize(ByVal Values)
vPgSize=Values
end property
'---------------------------------------------------------
'设置当前显示的页数
public property let currPg(ByVal Values)
vCurrPg=Values
end property
'--------------------------------------------------------
'设置查询的条件
public property let conditions(ByVal Values)
if Len(Values)>0 then
vConditions=" where "&Values
else
vConditions=" where 1=1 "
end if
end property
'-------------------------------------------------------
'设置查询的排序
public property let orderBy(ByVal Values)
if Len(Values)>0 then
vOrderBy=" order by "&Values
else
vOrderBy=Values
end if
end property
'-------------------------------------------------------------
'得到记录总数
public property get vRsCount()
if vCurrPg=1 then
sqlc="select count("&vPKey&") as Idcount from "&vTbName&" "&vConditions
set rsc=server.CreateObject("adodb.recordset")
rsc.open sqlc,conn,0,1
RsNum=rsc("IdCount")
rsc.close
set rsc=nothing
if RsNum>0 then
response.Cookies("iRecord")=RsNum
vRsCount=RsNum
else
vRsCount=0
end if
else
vRsCount=request.Cookies("iRecord")
end if
end property
'得到总页数
public property get vPgCount()
iRsCount2=vRsCount()
if iRsCount2 mod vPgSize =0 then
vPgCount=int(iRsCount2/vPgSize)
else
vPgCount=int(iRsCount2/vPgSize) 1
end if
end property
'查询数据库
Public Function rsDB()
on error resume next
'简单的查询出结果
' set rsDB = Server.CreateObject("ADODB.RecordSet")
' rsDB.Open strsql,conn,1,3
Set rsDB=conn.Execute(strsql)
errMsg "查询数据库"
End Function
'添加，更新，删除数据库记录
public Function upDB()
on error resume next
conn.execute(strsql)
errMsg "编辑数据库记录"
end Function
'-------------------------------------------------------------------------
'用来实现分页的记录集函数
public function pageRs()
on error resume next
dim startRs
startRs=(vCurrPg-1)*vPgSize
'-------------------------------------------------------------------------------------------
'使用此语句的话要根据参数修改代码，具体的是若排序为asc则<改为>,min改为max
' if startRs=0 then
' strsql="select top "&vPgSize&" "&vPgFields&" from "&vTbName&" "&vConditions&" "&vOrderBy
' else
' strsql="select top "&vPgSize&" "&vPgFields&" from "&vTbName&" "&vConditions&" and "&vPKey&" < "
' strsql=strsql&"(select min("&vPKey&") from (select top "&startRs&" "&vPKey&" from "
' strsql=strsql&vTbName&" "&vConditions&" "&vOrderBy&") as idTable) "&vOrderBy
' end if
'---------------------------------------------------------------
if startRs=0 then
strsql="select top "&vPgSize&" "&vPgFields&" from "&vTbName&" "&vConditions&" "&vOrderBy
else
strsql="select top "&vPgSize&" "&vPgFields&" from "&vTbName&" "&vConditions&" and "&vPKey&" not "
strsql=strsql&"in (select top "&startRs&" "&vPKey&" from "&vTbName&" "&vConditions&" "&vOrderBy
strsql=strsql&") "&vOrderBy
end if
'-------------------------------------------------------------------
set pageRs=server.CreateObject("adodb.recordset")
pageRs.open strsql,conn,0,1
errMsg "记录分页"
end function
'------sql用存储过程分页------------------------------------------------------
public function sqlPage()
on error resume next
Set sqlPage=server.CreateObject("Adodb.RecordSet")
Set Cm=Server.CreateObject("Adodb.Command")
Cm.CommandType = 4
Cm.ActiveConnection = conn
Cm.CommandText="sp_Util_Page"
Cm.parameters(1) = vPgFields
Cm.parameters(2) = vTbName
Cm.parameters(3) = vConditions
Cm.parameters(4) = vOrderBy
Cm.parameters(5) = vPKey
Cm.parameters(6) = vCurrPg
Cm.parameters(7) = vPgSize
Cm.parameters(8) = vRsCount()
Cm.parameters(9) = ""
sqlPage.CursorLocation = 3
sqlPage.LockType = 1
sqlPage.Open Cm
errMsg "记录分页"
end function
'----------------------------------------------------------------------------
'关闭记录集objRs
'----------------------------------------------------------------------------
Public Function cRs(ByVal ObjRs)
ObjRs.close()
Set ObjRs = Nothing
End Function
'----------------------分页的页码导航---------------------------------------
public function pageNav()
iRsCount=vRsCount()'总记录数
mypage=vCurrPg'当前页数
PgCount=vPgCount()'总页数
prePage=mypage-1
if prePage<1 then
prePage=1
end if
nextPage=mypage 1
if nextPage>PgCount then
nextPage=PgCount
end if
pagestr="<div id=""fy""><span id=""rpc"">总共有"&iRsCount&"条记录 "&mypage&"/"&PgCount&"</span>"
pagestr=pagestr&"<a href='?currpage=1' class='aW'>首页</a><a href='?currpage="&prePage&"' class='aW'>前一页</a>"
if (mypage-1) mod 4=0 then
firstPage=mypage
elseif int((mypage-1)/4)=0 then
firstPage=1
else
firstPage=int((mypage-1)/4)*4 1
end if
endPage=firstPage 4
astr=""
for i=firstPage to endPage
astr=astr&"<a href='?currpage="&i&"'"
if Cstr(mypage)=Cstr(i) then
astr=astr&" id='currP'"
end if
astr=astr&">"&i&"</a>"
if i>PgCount-1 then exit for
next
astr=astr&"<a href='?currpage="&nextPage&"' class='aW'>后一页</a><a href='?currpage="&PgCount&"' class='aW'>尾页</a></div>"
pagestr=pagestr&astr
pageNav=pagestr
end function
'输出带分页功能的table
Function showTb(ByVal TbTil)
set rsTb=pageRs()'若是存储过程就调用sqlPage()
tbRs= rsTb.getrows()
cRs(rsTb)
iTblRow=Ubound(tbRs,2)
iTblCol=Ubound(TbTil)
tbStr="<table border='0' cellspacing='0' cellpadding='0'><tbody>"
for r1=0 to iTblCol
tr1=tr1&"<td width='"&split(TbTil(r1),"|")(1)&"'>"&split(TbTil(r1),"|")(0)&"</td>"
next
tr1="<tr>"&tr1&"</tr>"
for ri=0 to iTblRow
for ci=0 to iTblCol
td=td&"<td width='"&split(TbTil(ci),"|")(1)&"'>"&tbRs(ci,ri)&"</td>"
next
tr=tr&"<tr>"&td&"</tr>"
td=null
next
TbTil=null
tbRs=null
response.Write(tbStr&tr1&tr&"<tr><td colspan='"&iTblCol 1&"'>"&pageNav()&"</td></tr></tbody></table>")
tbStr=null
tr1=null
tr=null
End Function
'打印sql语句，以便语句有错误时检查
Public Sub prnSql()
response.Write(strsql)
End Sub
'-------------------------------------------------------------------------
'容错函数
'-------------------------------------------------------------------------
Private Function errMsg(errMsg)
If Err.number<>0 Then
'出现问题可利用此处代码打印出描述信息，方便调试。可注释掉
response.Write(Cstr(Err.description)&"<br>")
Err.Clear
Response.Write "<font color='#FF0000'>"&errMsg&"出错</font>" '注释
Response.End()
End If
End Function
'-------------------------------------------------------------------------
'容错函数结束
'-------------------------------------------------------------------------
End Class
%>

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