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Clone 方法範例 (VBScript)

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這個範例會使用 Clone 方法來建立 Recordset 的複本，然後讓使用者獨立放置每個複本的記錄指標。

使用 Active Server Page (ASP) 中的下列範例。 這個範例會使用與 Microsoft Access 一起散發的 Northwind 資料庫。 將下列程式碼剪下並貼上到「記事本」或其他文字編輯器，並將其儲存為 CloneVBS.asp。 您可以在任何用戶端瀏覽器中顯示結果。

若要練習此範例，請將 RsCustomerList.Source = "Customers" 行變更為 RsCustomerList.Source = "Products" 以計算較大的資料表。

<!-- BeginCloneVBS -->  
<% Language = VBScript %>  
<%' use this meta tag instead of adovbs.inc%>  
<!--METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4" -->  
<HTML>  
<HEAD>  
<TITLE>ADO Clone Method</TITLE>  
</HEAD>  
  
<BODY>  
  
<H1 align="center">ADO Clone Method</H1>  
<HR>  
<% ' to integrate/test this code replace the   
   ' Data Source value in the Connection string%>  
<%   
    ' connection and recordset variables  
    Dim Cnxn, strCnxn  
    Dim rsCustomers, strSQLCustomers  
    Dim rsFirst, rsLast, rsCount  
    Dim rsClone  
    Dim CloneFirst, CloneLast, CloneCount  
  
    ' open connection  
    Set Cnxn = Server.CreateObject("ADODB.Connection")  
    strCnxn = "Provider='sqloledb';Data Source=" & _  
            Request.ServerVariables("SERVER_NAME") & ";" & _  
            "Integrated Security='SSPI';Initial Catalog='Northwind';"  
    Cnxn.Open strCnxn  
  
    ' create and open Recordset using object refs  
    Set rsCustomers = Server.CreateObject("ADODB.Recordset")  
    strSQLCustomers = "Customers"  
  
    rsCustomers.ActiveConnection = Cnxn  
    rsCustomers.CursorLocation = adUseClient  
    rsCustomers.CursorType = adOpenKeyset  
    rsCustomers.LockType = adLockOptimistic  
    rsCustomers.Source = strSQLCustomers  
    rsCustomers.Open  
  
    rsCustomers.MoveFirst  
    rsCount = rsCustomers.RecordCount  
    rsFirst = rsCustomers("CompanyName")  
    rsCustomers.MoveLast  
    rsLast = rsCustomers("CompanyName")  
  
    ' create clone  
    Set rsClone = rsCustomers.Clone  
    rsClone.MoveFirst  
    CloneCount = rsClone.RecordCount  
    CloneFirst = rsClone("CompanyName")  
    rsClone.MoveLast  
    CloneLast = rsClone("CompanyName")  
%>  
  
<!-- Display Results -->  
<H3>There Are <%=rsCount%> Records in the original recordset</H3>  
<H3>The first record is <%=rsFirst%> and the last record is <%=rsLast%></H3>  
<BR><HR>  
<H3>There Are <%=CloneCount%> Records in the original recordset</H3>  
<H3>The first record is <%=CloneFirst%> and the last record is <%=CloneLast%></H3>  
<BR><HR>  
<H4>Location of OLEDB Database</H4>  
  
<%  
    ' Show location of DSN data source  
    Response.Write(Cnxn)  
  
    ' Clean up  
    If rsCustomers.State = adStateOpen then  
       rsCustomers.Close  
    End If  
    If rsClone.State = adStateOpen then  
       rsClone.Close  
    End If  
    If Cnxn.State = adStateOpen then  
       Cnxn.Close  
    End If  
    Set rsCustomers = Nothing  
    Set rsClone = Nothing  
    Set Cnxn = Nothing  
%>  
</BODY>  
</HTML>  
<!-- EndCloneVBS -->

另請參閱

Clone 方法 (ADO)
Recordset 物件 (ADO)