记录集内随机取记录的代码
2016-02-19 12:29
清醒时做事，糊涂时读书，大怒时睡觉，无聊时关注图老师为大家准备的精彩内容。下面为大家推荐记录集内随机取记录的代码，无聊中的都看过来。
' Moving to random record - Steven Jones' Extension
If Not(记录集名称.bof and 记录集名称.eof) Then
' reset the cursor to the beginning
If (记录集名称.CursorType 0) Then
记录集名称.MoveFirst
Else
记录集名称.Requery
End If
记录集名称_totalrn = -1
记录集名称_totalrn = 记录集名称.RecordCount ' ony works on some recordsets, but much faster
If (记录集名称_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
记录集名称_totalrn=0
While (Not 记录集名称.EOF)
记录集名称_totalrn = 记录集名称_totalrn + 1
记录集名称.MoveNext
Wend
' reset the cursor to the beginning
If (记录集名称.CursorType 0) Then
记录集名称.MoveFirst
Else
记录集名称.Requery
End If
End If
' now do final adjustments, and move to the random record
记录集名称_totalrn = 记录集名称_totalrn - 1
If 记录集名称_totalrn 0 Then
Randomize
记录集名称.Move Int((记录集名称_totalrn + 1) * Rnd)
End If
End If
' all done; you should always check for an empty recordset before displaying data
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