asp下實現記錄集內隨機取記錄的代碼

記錄集內隨機取記錄的代碼

<%
' Moving to random record - Steven Jones' Extension
If Not(記錄集名稱.bof and 記錄集名稱.eof) Then
' reset the cursor to the beginning
If (記錄集名稱.CursorType > 0) Then
記錄集名稱.MoveFirst
Else
記錄集名稱.Requery
End If

記錄集名稱_totalrn = -1
記錄集名稱_totalrn = 記錄集名稱.RecordCount ' ony works on some recordsets, but much faster
If (記錄集名稱_totalrn = -1) Then ' and if it didn't work, we still have to count the records.

' count the total records by iterating through the recordset
記錄集名稱_totalrn=0
While (Not 記錄集名稱.EOF)
記錄集名稱_totalrn = 記錄集名稱_totalrn + 1
記錄集名稱.MoveNext
Wend

' reset the cursor to the beginning
If (記錄集名稱.CursorType > 0) Then
記錄集名稱.MoveFirst
Else
記錄集名稱.Requery
End If

End If

' now do final adjustments, and move to the random record
記錄集名稱_totalrn = 記錄集名稱_totalrn - 1
If 記錄集名稱_totalrn > 0 Then
Randomize
記錄集名稱.Move Int((記錄集名稱_totalrn + 1) * Rnd)
End If
End If
' all done; you should always check for an empty recordset before displaying data
%>