通过回调将动态项目添加到功能区组合框时出现问题

Question

我正在运行1904版的Excel（最新的Office 365每月发行版）。

我正在尝试向功能区中添加一个自定义的ComboBox，并带有一个可以在运行时更改的列表。

无论我做什么，都永远不会调用两次回调：getItemLabel 和getItemID。因此，ComboBox永远不会充满任何数据。其他两个回调如预期的getItemCount和onChange一样被调用。

我本以为2个非行为回调将在getItemCount之后被触发，但我只能在调试代码的去向时看到代码通过getItemCount。 / p>

下面是我通过免费的 Microsoft Office自定义UI编辑器工具将其添加到Excel工作表中的XML文件的摘录：

<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui" onLoad="rxIRibbonUI_onLoad">
    <ribbon>
        <tabs>
            <tab id="xlSherlockTab" label="Share  Register" keytip="K" insertBeforeMso="TabHome">
                <group id="customGroupSettings" label="Settings">
                    <comboBox id="cboSearchIssuer" label="Issuer" getItemCount="RibbonUI.SearchIssuer_getItemCount" getItemID="RibbonUI.SearchIssuer_getItemId" getItemLabel="RibbonUI.SearchIssuer_getItemLabel" onChange="RibbonUI.SearchIssuer_Click"/>
                </group>
            </tab>
        </tabs>
    </ribbon>
</customUI>

包含在称为RibbonUI的标准模块中的VBA代码相关部分的摘录：

'Callback for customUI.onLoad
Sub rxIRibbonUI_onLoad(ribbon As IRibbonUI)
   MsgBox "ribbon_onLoad"
   RibbonManager.SetRibbon ribbonParameter:=ribbon
   ribbon.InvalidateControl ("cboSearchIssuer")
End Sub

''''''''''''''''''''
''rxcboSearchIssuer
''''''''''''''''''''

'Callback for rxcboSearchIssuer onChange
Sub SearchIssuer_Click(control As IRibbonControl, text As String)
    MsgBox text
    RibbonManager.GetRibbon().InvalidateControl ("cboSearchIssuer")
End Sub

'Callback for rxcboSearchIssuer getItemCount
Sub SearchIssuer_getItemCount(control As IRibbonControl, ByRef returnedVal)
    MsgBox DASHBOARD.ListObjects(1).ListRows.Count
    MsgBox control.id
    returendVal = DASHBOARD.ListObjects(1).ListRows.Count
End Sub


''NOT BEING CALLED FROM HERE ONWARDS....

'Callback for rxcboSearchIssuer getItemLabel
Sub SearchIssuer_getItemLabel(control As IRibbonControl, index As Integer, ByRef returnedVal)
    returnedVal = "Harry: " & CStr(index) 'DASHBOARD.ListObjects(1).ListRows(index).Range(1, 3)
End Sub

Sub SearchIssuer_getItemID(control As IRibbonControl, index As Integer, ByRef id)
    id = "cbo" & CStr(index)
End Sub