在子窗体中搜索值（vba Access2013）

我在表单中有一个打开的子表单。该子表单基于查询并包含多条记录。我想搜索子窗体以查找是否有任何记录的字段值为true

搜索之后，最好的建议是使用sql。这就是我正在处理的问题：-

Dim iRecCount As Integer
Dim strRecCount As String
Dim vInvoiceID as Variant

vInvoiceID = [Forms]![Invoices]![InvoiceID].Value


strRecCount = "SELECT Count(*) AS CountOfSlotID FROM (Appointments INNER JOIN Students ON Appointments.StudentID = Students.StudentID) INNER JOIN Invoices ON Appointments.InvoiceID = Invoices.InvoiceID WHERE (((Appointments.InvoiceID)=" & vInvoiceID & ") AND ((Students.PAYG)=Yes));"

iRecCount = CurrentDb.OpenRecordset(strRecCount).Fields(0).Value

If iRecCount > 0 Then
    [Forms]![Invoices]![Temp Termly].Value = True
Else: [Forms]![Invoices]![Temp Termly].Value = False
End If

如果我在查询中复制并粘贴SQL字符串，它会给出正确的结果，事实上，它是从一个工作查询中获取SQL字符串的。但是，无论发生什么情况，此代码都返回零。我觉得这句话有点不对劲：-

iRecCount = CurrentDb.OpenRecordset(strRecCount).Fields(0).Value

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任何建议或替代解决方案都会有所帮助。

您可以使用RecordsetClone：

Dim rs As DAO.Recordset
Dim Found As Boolean

Set rs = Me!SubformControlName.Form.RecordsetClone
If rs.RecordCount > 0 Then
    rs.FindFirst "[Temp Termly] = True"
    Found = Not rs.NoMatch
End If
Set rs = Nothing

If Found = True Then
    ' Success.
End If