[转帖]将连接数据库的代码隐藏在DLL中

其实，大家在书写asp程序时，最担心的可能就是数据库的连接信息，会被一些人看到，进行一些破坏。下面我们用vb6.0来做一个动态链接库(.dll)来隐藏数据库的连接信息。 　　启动vb6.0，新建-->Active dll工程。单击"工程"-->引用,选择"microsoft active server pages object library" 和"microsoft activeX data objects 2.1 library"两项。将类模块的名称改为dcss.将工程的名称改为yygwy.保存工程文件yygwy.vbp和类文件dcss.cls。 在dcss.cls中写入: Private myscriptingcontext As ScriptingContext Private myapplication As Application Private myrequest As Request Private myresponse As Response Private myserver As Server Private mysession As Session Public Sub onstartpage(passedscriptingcontext As ScriptingContext) Set myscriptingcontext = passedscriptingcontext Set myapplication = myscriptingcontext.Application Set myrequest = myscriptingcontext.Request Set myresponse = myscriptingcontext.Response Set myserver = myscriptingcontext.Server Set mysession = myscriptingcontext.Session End Sub Public Sub onendpage() Set myscriptingcontext = Nothing Set myapplication = Nothing Set myrequest = Nothing Set myresponse = Nothing Set myserver = Nothing Set mysession = Nothing End Sub '以上语句是必须的。 '定义两个公有函数 Public Function rsresult(strsql As String) As Recordset Dim mycnn As Connection Dim myset As Recordset Dim strconnstring As String 'strconnstring = "provider=sqloledb.1; password=;" & "user id=sa;" & "initial catalog=vlog;" & "data source=hpe60; connect timeout=15" strconnstring = "driver={sql server};server=yang;uid=sa;pwd=; database=dcss" 'mycnn.ConnectionString = strconnstring mycnn.Open strconnstring myset.ActiveConnection = mycnn myset.Open strsql, mycnn, 3, adCmdText Set rsresult = myset End Function Public Function datasource() As Variant datasource = "driver={sql server};server=yang;uid=sa;pwd=; database=dcss" End Function 编译生成dcss.dll文件。注册regsvr32 路径\dcss.dll。 用visual interdev打开global.asa文件.当然了，你也可以在其它文件中使用。 set dcss=server.CreateObject("yygwy.dcss") oconn=dcss.datasource() application("strconn")=oconn 在其它的页面中如下调用即可： set objConn = Server.CreateObject("ADODB.Connection") objConn.Open application("strconn")