This example uses the Clone method to create copies of a Recordset and then lets the user position the record pointer of each copy independently.
Public Sub CloneX()
Dim arstStores(1 To 3) As ADODB.Recordset
Dim intLoop As Integer
Dim strSQL As String
Dim strCnn As String
Dim strMessage As String
Dim strFind As String
' Assign SQL statement and connection string to variables.
strSQL = "SELECT stor_name FROM Stores " & _
"ORDER BY stor_name"
strCnn = "Provider=sqloledb;" & _
"Data Source=srv;Initial Catalog=pubs;User Id=sa;Password=; "
' Open recordset as a static cursor type recordset.
Set arstStores(1) = New ADODB.Recordset
arstStores(1).CursorType = adOpenStatic
arstStores(1).LockType = adLockBatchOptimistic
arstStores(1).Open strSQL, strCnn, , , adCmdText
' Create two clones of the original Recordset.
Set arstStores(2) = arstStores(1).Clone
Set arstStores(3) = arstStores(1).Clone
Do While True
' Loop through the array so that on each pass,
' the user is searching a different copy of the
' same Recordset.
For intLoop = 1 To 3
' Ask for search string while showing where
' the current record pointer is for each Recordset.
strMessage = _
"Recordsets from stores table:" & vbCr & _
" 1 - Original - Record pointer at " & _
arstStores(1)!stor_name & vbCr & _
" 2 - Clone - Record pointer at " & _
arstStores(2)!stor_name & vbCr & _
" 3 - Clone - Record pointer at " & _
arstStores(3)!stor_name & vbCr & _
"Enter search string for #" & intLoop & ":"
strFind = Trim(InputBox(strMessage))
If strFind = "" Then Exit Do
' Find the search string; if there's no
' match, jump to the last record.
arstStores(intLoop).Filter = "stor_name >= '" & strFind & "'"
If arstStores(intLoop).EOF Then
arstStores(intLoop).Filter = adFilterNone
arstStores(intLoop).MoveLast
End If
Next intLoop
Loop
arstStores(1).Close
arstStores(2).Close
arstStores(3).Close
End Sub
Here is the same example written in VBScript to be used in an Active Server Page (ASP). To view this fully functional example, you need to create a system Data Source Name (DSN) called AdvWorks using the data source AdvWorks.mdb installed with IIS and located at C:\InetPub\ASPSamp\AdvWorks. This is a Microsoft Access database file. Use Find to locate the file Adovbs.inc and place it in the directory you plan to use. Cut and paste the following code to Notepad or another text editor and save it as Clone.asp. You can view the result in any client browser.
To exercise the example, change the line RsCustomerList.Source = "Customers" to RsCustomerList.Source = "Products" to count a larger table.
<!-- #Include file="ADOVBS.INC" -->
<% Language = VBScript %>
<HTML><HEAD>
<TITLE>ADO Clone Method</TITLE>
</HEAD><BODY> <Center>
<H3>ADO Clone Method</H3>
<!--- ADO Connection Object used to create recordset-->
<%
'Create and open Connection object
Set OBJdbConnection = Server.CreateObject("ADODB.Connection")
OBJdbConnection.Open "AdvWorks"
'Create and open Recordset object
Set RsCustomerList = Server.CreateObject("ADODB.Recordset")
RsCustomerList.ActiveConnection = OBJdbConnection
RsCustomerList.CursorType = adOpenKeyset
RsCustomerList.LockType = adLockOptimistic
RsCustomerList.Source = "Customers"
RsCustomerList.Open
%>
<HR>
<!-- Loop through Customers Table, adding 1 to the Counter variable each pass -->
<%
Set MyRecordset = RSCustomerList.Clone
Counter = 0
Do Until MyRecordset.EOF
Counter = Counter + 1
MyRecordset.MoveNext
Loop
%>
<!-- Display Results -->
<H3>There Are <%=Counter %> Records in the Customers Table</H3>
<BR><HR>
<H4>Location of DSN Datbase</H4>
<%' Show location of DSN data source
Response.Write(OBJdbConnection)
%>
<HR></Center></BODY></HTML>