。。。
If Rs.RecordCount > 0 Then
Rs.MoveFirst
For i = 1 To Rs.RecordCount
If (Rs("Group_No") = Me![GroupNo] And Rs("PartNumber") = Me![PartNumber] And Rs("Date_N") = Me![DTPicker0] And Rs("Description") = Me![Description]) Then
MsgBox "数据已存在!", vbCritical, "已存在"
Exit Sub
Else
Rs.MoveNext
End If
Next i '到达32767条时报错