无法显示或隐藏我的 VSTO Excel 加载项

Question

I have a ribbon called Ribbon 1

I want my ribbon to show only when a workbook is open. If only the excel application is running and no workbooks are open then I want to hide my ribbon tab. How can I do that?

This is what I tried but it is not hiding the ribbon

Public Class ThisAddIn
    Private Sub Application_WorkbookOpen(ByVal doc As Excel.Workbook) Handles Application.WorkbookOpen
        If Application.Workbooks.Count > 0 Then
            If Globals.Ribbons.Ribbon1.Tab1.Visible = False Then Globals.Ribbons.Ribbon1.Tab1.Visible = True
        End If
    End Sub

    Private Sub Application_WorkbookBeforeClose(ByVal doc As Excel.Workbook, ByRef Cancel As Boolean) Handles Application.WorkbookBeforeClose
        If Application.Workbooks.Count = 1 Then
            If Globals.Ribbons.Ribbon1.Tab1.Visible = True Then Globals.Ribbons.Ribbon1.Tab1.Visible = False
        End If
    End Sub
End Class

I am not getting any error. It is simply not hiding it. I put a break point on If Globals.Ribbons.Ribbon1.Tab1.Visible = True Then Globals.Ribbons.Ribbon1.Tab1.Visible = False . The line executed but the tab didn't hide. I am having a brain freeze! Is this the right way to do what I want?

Answer 1

The following equivalent code in c# works if the ControlIdType of the Ribbon is set to Custom , however it doesn't work if it is set to Office (I assume it is the case for you..). So it seems to me that you find a bug/limitation in the VSTO runtime: it is only possible to change the visibility if the tab is custom (ie if it is on a new independent tab).

    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        this.Application.WorkbookBeforeClose += Application_WorkbookBeforeClose;
        this.Application.WorkbookOpen += Application_WorkbookOpen;
    }

    private void Application_WorkbookOpen(Excel.Workbook Wb)
    {
        if (this.Application.Workbooks.Count > 0) {
            if (Globals.Ribbons.Ribbon1.tab1.Visible == false) Globals.Ribbons.Ribbon1.tab1.Visible = true;
        }

    }

    private void Application_WorkbookBeforeClose(Excel.Workbook Wb, ref bool Cancel)
    {
        if (this.Application.Workbooks.Count == 1)
        {
            if (Globals.Ribbons.Ribbon1.tab1.Visible == true) Globals.Ribbons.Ribbon1.tab1.Visible = false;
        }
    }

Edit: As properly shown in Siddharth Rout's answer, it is not a bug: to hide a tab with the Office configuration, we need to hide all the groups.

Answer 2

As Malick mentioned, it depends on the ControlIdType of the Ribbon

If you change it to Custom , your original code posted in the question should work.

For Office you have to hide all the groups. Once all the Groups are hidden, the tab will automatically hide.

Public Class ThisAddIn
    '~~> Workbook Open
    Private Sub Application_WorkbookOpen(ByVal doc As Excel.Workbook) Handles Application.WorkbookOpen
        If Application.Workbooks.Count > 0 Then
            For Each ribbonGroup In Globals.Ribbons.Ribbon1.Tab1.Groups
                ribbonGroup.Visible = True
            Next
        End If
    End Sub

    '~~> This is if the user presses CTRL + N for a new workbook
    Private Sub Application_WorkbookActivate(ByVal doc As Excel.Workbook) Handles Application.WorkbookActivate
        If Application.Workbooks.Count > 0 Then
            For Each ribbonGroup In Globals.Ribbons.Ribbon1.Tab1.Groups
                ribbonGroup.Visible = True
            Next
        End If
    End Sub

    '~~> Before Close
    Private Sub Application_WorkbookBeforeClose(ByVal doc As Excel.Workbook, ByRef Cancel As Boolean) Handles Application.WorkbookBeforeClose
        If Application.Workbooks.Count = 1 Then
            If Globals.Ribbons.Ribbon1.Tab1.Visible = True Then
                For Each ribbonGroup In Globals.Ribbons.Ribbon1.Tab1.Groups
                    ribbonGroup.Visible = False
                Next
            End If
        End If
    End Sub
End Class