在进行ASP网站开发时,有时需在客户端调用MSSQL数据库的数据进行打印,若调用数据量小,可以通过在客户端运用FileSystemObject生成文件对象的方法实现打印,这里不再赘述。若需调用大量数据,可在客户端脚本中实例化RDS.DataSpace(Remote Data Service)对象,并采用远程提供程序通过ASP网站访问MSSQL数据库(设置成只能通过RDS Default Handler或自定义商业对象才能访问数据库,可保证数据库的安全),再在客户端实例化EXCEL.APPLICATION对象,把数据集中的数据写入EXCEL中,再进行保存或打印。代码如下:
<html> <head> <META content="text/html; charset=gb2312" http-equiv=Content-Type> <title>客户端电子表格打印</title> </head> <body bgColor=skyblue topMargin=5 leftMargin="20" oncontextmenu="return false" rightMargin=0 bottomMargin="0"> <div align="center"><center> <table border="1" bgcolor="#ffe4b5" style="HEIGHT: 1px; TOP: 0px" bordercolor="#0000ff"> <tr> <td align="middle" bgcolor="#ffffff" bordercolor="#000080"> <font color="#000080" size="3"> 客户端电子表格打印 </font> </td> </tr> </table> </div> <form name="myform"> <DIV align=left> <input type="button" value="Excel Report" name="report" language="vbscript" onclick="fun_excel()" style="HEIGHT: 32px; WIDTH: 90px"> </div> </form> </body> </html> <script language="vbscript"> sub fun_excel() Dim rds,rs,df dim strCn,strSQL,StrRs Dim xlApp, xlBook, xlSheet1 set rds = CreateObject("RDS.DataSpace") Set df = rds.CreateObject("RDSServer.DataFactory","http://192.168.0.1") @#192.168.0.1 为WEB服务器IP地址 strcn="provider=ms remote;remote server=http://192.168.0.1;handler=msdfmap.handler;data source=pubsdatabase;" @#192.168.0.1 为WEB服务器IP地址 strsql= "getalljobs" Set rs = df.Query(strCn, strSQL) Set xlApp = CreateObject("EXCEL.APPLICATION") @#注意不是:Server.CreateObject("EXCEL.APPLICATION") Set xlBook = xlApp.Workbooks.Add Set xlSheet1 = xlBook.Worksheets(1) xlSheet1.cells(1,1).value ="职务表" xlSheet1.range("A1:D1").merge xlSheet1.cells(2,1).value = "job_id" xlSheet1.cells(2,2).value = "job_desc" xlSheet1.cells(2,3).value = "max_lvl" xlSheet1.cells(2,4).value = "min_lvl" cnt =3 do while not rs.eof xlSheet1.cells(cnt,1).value = rs("job_id") xlSheet1.cells(cnt,2).value = rs("job_desc") xlSheet1.cells(cnt,3).value = rs("max_lvl") xlSheet1.cells(cnt,4).value = rs("min_lvl") rs.movenext cnt = cint(cnt) + 1 loop xlSheet1.Application.Visible = True end sub </script> |
也可以实例化RDS DataControl,只需把以上部分代码进行修改:
set rds = CreateObject("RDS.DataSpace") Set df = rds.CreateObject("RDSServer.DataFactory","http://192.168.0.1") @#192.168.0.1 为WEB服务器IP地址 strcn="provider=ms remote;remote server=http://192.168.0.1;handler=msdfmap.handler;data source=pubsdatabase;" @#192.168.0.1 为WEB服务器IP地址 strsql= "getalljobs" Set rs = df.Query(strCn, strSQL) |
修改为:
set DC = createobject("RDS.DataControl") dc.ExecuteOptions =1 @#设置成同步执行,可以简化下步代码 dc.FetchOptions = 1 With dc .Server = "http://192.168.0.1" .Handler = "MSDFMAP.Handler" .Connect = "Data Source=pubsdatabase;" .Sql = "getalljobs" .Refresh End With set rs= dc.Recordset |
修改文件MSDFMAP.INI(若在WIN98,C:\windows\msdfmap.ini;若在WIN2000,D:\winnt\msdfmap.ini;若在WIN2000 SERVER,D:\winnts\msdfmap.ini)。
[sql getalljobs] Sql="SELECT * FROM jobs" [connect pubsDatabase] Access=Readonly Connect="provider=sqloledb;data source=sql server;initial catalog=pubs;UID=userid;PWD=password" |
打开注册表HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Services\W3SVC\Parameters\ADCLaunch 若无 RDSServer.Datafactory,请添加。本例使用RDS Default Handler访问数据库,若不通过RDS Handler访问数据库,修改注册表HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DataFactory\ HandlerInfo 将HandlerRequired=1 设置成HandlerRequired =0。请注意,若不通过RDS Handler或自定义商业对象访问数据库,将对数据库带来安全隐患,所以作者极力推荐采用只能通过RDS Handler或自定义商业对象才能访问数据库的方式。
下面用VB编写一个自定义商业对象,代码如下:
@#编写ActiveX DLL,名称:rsget.dll,包含类rsreturn,方法returnrs Public Function ReturnRs(strDB As Variant, strSQL As Variant) As ADODB.Recordset @#Returns an ADODB recordset. On Error GoTo ehGetRecordset Dim cn As New ADODB.Connection Dim rs As New ADODB.Recordset Select Case strDB Case "ydjjspdatabase" strDB = "ydjjsp" Case "pubsdatabase" strDB = "pubs" End Select If strSQL = "getallbuy" Then strSQL = "select * from buyuser" GoTo nextstep End If If Left(strSQL, InStr(strSQL, "(") - 1) = "getpubsbyid" Then If InStr(strSQL, ",") <= 0 Then Dim str As String str = Mid(strSQL, InStr(strSQL, "(") + 2, InStr(strSQL, ")") - InStr(strSQL, "(") - 3) strSQL = "select * from jobs where job_id=@#" & str & "@#" Else Dim strstart, strend As String strstart = Mid(strSQL, InStr(strSQL, "(") + 2, InStr(strSQL, ",") - InStr(strSQL, "(") - 3) strend = Mid(strSQL, InStr(strSQL, ",") + 2, InStr(strSQL, ")") - InStr(strSQL, ",") - 3) strSQL = "select * from jobs where job_id>=@#" & strstart & "@# and job_id<=@#" & strend & "@#" End If End If nextstep: Dim strConnect As String strConnect = "Provider=SQLOLEDB;Server=ddk;uid=ydj;pwd=ydj; Database=" & strDB & ";" cn.Open strConnect rs.CursorLocation = adUseClient rs.Open strSQL, cn, adOpenStatic, adLockOptimistic, adCmdText Set ReturnRs = rs Exit Function ehGetRecordset: Err.Raise Err.Number, Err.Source, Err.Description End Function |
把rsget.dll复制到C:\WINDOWS或D:\WINNT,开始\运行,输入Regsvr32.exe c:\windows\rsget.dll或Regsvr32.exe d:\winnt\rsget.dll,按确定按钮,注册成WEB服务器组件,并在注册表HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Services\W3SVC\Parameters\ADCLaunch 添加rsget.rsreturn。
若使用自定义商业对象,修改上面的ASP文件代码:
set rds = CreateObject("RDS.DataSpace") Set df = rds.CreateObject("RDSServer.DataFactory","http://192.168.0.1") @#192.168.0.1 为WEB服务器IP地址 strcn="provider=ms remote;remote server=http://192.168.0.1;handler=msdfmap.handler;data source=pubsdatabase;" @#192.168.0.1 为WEB服务器IP地址 strsql= "getalljobs" Set rs = df.Query(strCn, strSQL) |
改为:
set rds = CreateObject("RDS.DataSpace") Set df = rds.CreateObject("rsget.rsreturn","http://192.168.0.1") set rs=df.returnrs("pubsdatabase","getpubsbyid(@#2@#,@#10@#)") |
另外在浏览器端需做如下配置:
打开控制面板->INTERNET选项->安全性->自定义级别-> 对没有标记为安全的ActiveX控件进行初始化和脚本运行->开启
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