首页 > 解决方案 > MS Access Form VBA 检查复选框,在检查其他人之前?

问题描述

我正在开发一个带有 SQL 后端的 Access 应用程序。

我有一个人的表格,每个人都可能需要检查或取消检查不同的东西。表单上有以下字段和对应的控件:

无选项(整数 - 布尔值 - 复选框)

选项 A(整数 - 布尔值 - 复选框)

期权金额(金额)

选项 B(整数 - 布尔值 - 复选框)

选项 B 金额(金钱)

选项 C(整数 - 布尔值 - 复选框)

选项 C 金额(金钱)

选项 D(整数 - 布尔值 - 复选框)

选项 D 命令按钮(打开带有选项类型下拉列表和要输入的多个值的数量的弹出表单)。

我担心的是,如果有人选中一个框,它可能会与另一个复选框或货币字段发生冲突。

如果有人选中 No Options,并且选中了其他选项之一,我必须取消选中这些选项。我还需要将他们相应的货币字段设为 0。如果链接表中有选项 D“其他选项”记录,那么在与用户确认后,我也需要删除这些记录。我还想禁用选项 A - D 的复选框和货币/命令按钮控件。

如果我取消选中无选项,那么我需要启用所有这些。

您可以开始看到每次我检查任何无选项或选项 A - D 时,我必须检查无选项的状态以及选项的相应金额,以确认用户想要进行此更改。

为此,我为更新前的无选项设置了以下代码:

Private Sub NoOptions_BeforeUpdate(Cancel As Integer)
Dim Msg, Style, Title
Dim delOLiensSQL

If Me.NoOptions = False Then
    If (Me.OptionA = True Or Me.OptionB = True Or Me.OptionC = True Or Me.OptionD = True) Then
        Msg = "You have chosen No Options, but one or more option is checked." & vbCrLf & _
        "Choosing No Options will require removing all Lien amounts." & vbCrLf & _
        "Would you like to change this Person to No Options?"
        Style = vbYesNo
        Title = "All Options Will Be Reset to 0 and False."
        Response = MsgBox(Msg, Style, Title)

        If Response = vbYes Then
            If Nz(DLookup("ID", "tblPersonOtherOptionsD", "FKPerson = " & Me.ID), 0) Then
                delOLiensSQL = "Delete From tblPersonOtherOptionsD Where FKPerson = " & Me.ID
                DoCmd.RunSQL delOoptionssSQL, dbSeeChanges
            End If
            Me.OptionA = False
            Me.OptionAAmount = 0
            Me.OptionB = False
            Me.OptionBAmount = 0
            Me.OptionC = False
            Me.OptionCAmount = 0
            Me.OptionD = False
            OptionsAllowPubFunc (False)
        Else
            Me.Undo
            MsgBox "OK, we will leave everything as it is.", vbOKOnly, "Better Safe Than Sorry"
        End If
    Else
        Me.NoOptions = True
    End If
Else
    Me.NoOptions = False
End If
End Sub

OptionsAllowPubFunc (False) 是一个公共函数,如下所示:

Public Function PlaintiffLiensAllowed(Liens As Boolean)
    Forms!frmPerson.OptionAAmount.Enabled = Liens
    Forms!frmPerson.OptionBAmount.Enabled = Liens
    Forms!frmPerson.OptionCAmount.Enabled = Liens
    Forms!frmPerson.OptionDAmount.Enabled = Liens
End Function

我还为 OptionA、OptionB、OptionC、OptionD 设置了更新前公共功能,如下所示:

Public Function ChangeAOption(OptionCheck As Control, OptionAmount As Control, OptionName As String)
    Dim Msg, Style, Title
    Dim Msg2, Style2, Title2

    If OptionCheck = True Then

        If Nz(OptionAmount, 0) > 0 Then
            Msg = "There is a " & OptionName & " Option amount. Unchecking " & OptionName & " Option, will require the amount to be 0." & vbCrLf & _
            "Would you like to uncheck " & OptionName & " Option and make the amount 0?"
            Style = vbYesNo
            Title = "Confirm No " & OptionName & " Option."
            Response = MsgBox(Msg, Style, Title)

            If Response = vbYes Then
                OptionAmount = 0
                OptionCheck = False
            Else
                OptionCheck.Undo
                MsgBox "Ok, we will leave it as is.", vbOKOnly, "Better Safe Than Sorry."
            End If
        Else
            OptionCheck = False
        End If
    Else
        If Forms!frmPerson.NoOptions = True Then
            Msg2 = "No Options is Checked. Checking " & OptionName & " Options will require no Options to be unchecked." & vbCrLf & _
            "Would you like to uncheck no Options?"
            Style2 = vbYesNo
            Title2 = "Confirm No Options False."
            Response2 = MsgBox(Msg2, Style2, Title2)
            If Response2 = vbYes Then
                OptionsAllowPubFunc (True)
                Forms!frmPerson.NoOptions = False
                OptionCheck = True
            Else
                OptionCheck = True
            End If
        Else
        OptionCheck = True
    End If
End Function

我正在对此进行测试,当我尝试选中 No Options 复选框并将其从 false 更改为 true 时,出现运行时错误“-2147352567 (80020009)”:

为该字段设置为 BeforeUpdate 或 ValidationRule 属性的宏或函数正在阻止 [人员应用程序] 在该字段中保存数据。

有人知道我在做什么错吗?有没有更简单的方法来做到这一点?

谢谢!!!

标签: vbams-accessdependenciesbooleanbeforeupdate

解决方案


根据我最近的经验,当触发更新前事件时,它会在任何计算中使用该字段的新值。所以我希望你想要开始那个主要的If陈述,比如If Me.NoOptions = True Then. 我也不相信你需要sElse OptionCheck = True之前的位End If

可能导致问题的是您调用OptionsAllowPubFunc了 ,但实际上调用了您在此问题中包含的函数PlaintiffLiensAllowed- 除非您有一个名为 OptionsAllowPubFunc 的相同函数,否则这会给您一个错误。

最后,我从来没有发现me.undo在这种情况下特别有用,但是更新前给了你一个结果——只要告诉它取消使用Cancel = True(或任何不为 0 的东西),它就不会更新字段和退出潜艇。

如果选项字段取消选中该框,您还可以添加一点以重新启用选项字段。

尝试将其运行为:

Private Sub NoOptions_BeforeUpdate(Cancel As Integer)
Dim Msg As String, Style As VbMsgBoxStyle, Title As String
Dim Response As VbMsgBoxResult, delOLiensSQL As String

If Me.NoOptions = True Then
    If (Me.OptionA = True Or Me.OptionB = True Or Me.OptionC = True Or Me.OptionD = True) Then
        Msg = "You have chosen No Options, but one or more option is checked." & vbCrLf & _
        "Choosing No Options will require removing all Lien amounts." & vbCrLf & _
        "Would you like to change this Person to No Options?"
        Style = vbYesNo
        Title = "All Options Will Be Reset to 0 and False."
        Response = MsgBox(Msg, Style, Title)

        If Response = vbYes Then
            If Nz(DLookup("ID", "tblPersonOtherOptionsD", "FKPerson = " & Me.ID), 0) Then
                delOLiensSQL = "Delete From tblPersonOtherOptionsD Where FKPerson = " & Me.ID
                DoCmd.RunSQL delOoptionssSQL, dbSeeChanges
            End If
            Me.OptionA = False
            Me.OptionAAmount = 0
            Me.OptionB = False
            Me.OptionBAmount = 0
            Me.OptionC = False
            Me.OptionCAmount = 0
            Me.OptionD = False
            PlaintiffLiensAllowed(False)
        Else
            MsgBox "OK, we will leave everything as it is.", vbOKOnly, "Better Safe Than Sorry"
            Cancel = True
        End If
    End If
Else
    PlaintiffLiensAllowed(True)
End If
End Sub

推荐阅读