在子表单中搜索值 (vba Access 2013)

Question

我有一个打开的子表单（在表单内）。子表单基于查询并包含多条记录。我想搜索子表单以查找是否有任何记录具有 = true 的字段值。

搜索后最好的建议是使用 sql。这就是我正在使用的：-

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

如果我将 SQL 字符串复制并粘贴到查询中，它会给我正确的结果（实际上是从工作查询中获取了 SQL 字符串）。但是，无论如何，此代码都返回零。我认为这行有问题：-

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

任何建议或替代解决方案都会有所帮助。

Answer 1

您将使用 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