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我有一个组合框,它会在第一次使用时创建列表。我知道我希望“NotInList”的行为方式不是传统方式 - 我不想浪费将项目添加到与所需条目分开的表格中,但我仍想警告某件物品,还没有被使用,所以用户在接受输入之前必须考虑三次。动态组合框列表的警告
一旦用户添加的项目,它会自动在下一个时间,因为组合框的数据源出现在列表如下:
SELECT tbl_SP.PROGRAM
FROM tbl_SP
GROUP BY tbl_SP.PROGRAM
HAVING (((tbl_SP.PROGRAM) Is Not Null And (tbl_SP.PROGRAM)<>""));
我尝试这样做:
Private Sub cmbPROGRAM_NotInList(NewData As String, Response As Integer)
If MsgBox("'" & Chr(34) & NewData & Chr(34) & " hasn't been used yet. Add to list? ", vbQuestion + vbYesNo, "Add - " & NewData & "?") = vbYes Then
Response = acDataErrAdded
End If
End Sub
但是当然,Access在发布错误之前希望项目实际存在。并且...如果我将LimitToList设置为“否”,那么用户不会收到警告。
我该如何实现这种行为?
好吧,我想这其中工作正常,如果用户选择了YES,但变得更加复杂,当用户选择“否”
Public Function ReturnsRecords(strSQL As String) As Boolean
Dim d As DAO.Database
Dim arr(1 To 3) As DAO.Recordset
'Dim rs As DAO.Recordset
'assume 3 items in array above
Set d = CurrentDb
Set arr(1) = d.OpenRecordset(strSQL)
' MsgBox "Record Count is " & arr(1).RecordCount
If arr(1).RecordCount > 0 Then
ReturnsRecords = True
Else
ReturnsRecords = False
End If
Set d = Nothing
End Function
Private Sub cmbPROGRAM_BeforeUpdate(Cancel As Integer)
Dim strSQL As String
strSQL = "Select * from LU_PROGRAM where PROGRAM ='" & Me.cmbPROGRAM & "'"
If ReturnsRecords(strSQL) = False Then
If MsgBox("'" & Chr(34) & Me.cmbPROGRAM & Chr(34) & " hasn't been used yet. Add to list? ", vbQuestion + vbYesNo, "Add - " & Me.cmbPROGRAM & "?") = vbNo Then
Cancel = True
' how do I reset this? Me.cmbPROGRAM.Text = Null
End If
End If
End Sub
如何清除组合框,如果用户选择NO?如果我选择me.undo,则会撤消所有条目,但我只想清除组合框。
顺便说一句,形式是完全绑定,直到用户选择“保存”
谢谢。这是我的不受约束的形式,使它成为一项挑战。我希望避免创建查找库,但我认为它终于来了 – monty327