Excel VSTO 插件 showing/hiding 任务窗格

Question

我在这里做教程。空白 excel 页面

一切正常

https://msdn.microsoft.com/en-us/library/bb608590(v=vs.120).aspx

当我加载 excel sheet 某人给我并点击 toggleButton1 以显示我得到的窗格时

{"The taskpane has been deleted or is otherwise no longer valid."}

上线

   private void toggleButton1_Click(object sender, RibbonControlEventArgs e)
    {
        Globals.ThisAddIn.TaskPane.Visible = ((RibbonToggleButton)sender).Checked;
    }

指向该任务窗格的指针是否以某种方式消失了？

Microsoft.Office.Tools.CustomTaskPane PartPhotoTaskPane;
Globals.ThisAddIn.Application.WindowActivate += Application_WindowActivate;

        void Application_WindowActivate(Excel.Workbook Wb, Excel.Window Wn)
    {
        if (PartPhotoTaskPane != null)
        {
            PartPhotoTaskPane.Dispose();
            InitalizePartPhotoViewerTaskPane(EPPF);
        }
        else
        {
            InitalizePartPhotoViewerTaskPane(EPPF);
        }
    }

    /// <summary>
    /// Start up the part photo viewer task pane
    /// </summary>
    private void InitalizePartPhotoViewerTaskPane(ExcelPartPhotoFunctions _EPPF)
    {
        //intialize the part search
        try
        {
            PartPhotoTaskPane = Globals.ThisAddIn.CustomTaskPanes.Add(new PartPhotoSearchPane(_EPPF), "Part Information", Globals.ThisAddIn.Application.ActiveWindow);
            PartPhotoTaskPane.Visible = Properties.Settings.Default.InfoPaneOpenStatus;
            PartPhotoTaskPane.Width = 260;
        }
        catch (Exception e)
        {
            MessageBox.Show("Error starting Part Info Toolbar:" + Environment.NewLine +
            e.Message + Environment.NewLine + e.StackTrace, "Error!", MessageBoxButtons.OK,
            MessageBoxIcon.Error);
        }
    }

尝试 1：

点击事件仍然出错。我猜这与我需要在 class 之间共享该窗格有关吗？

private void toggleButton1_Click(object sender, RibbonControlEventArgs e)
    {
        Globals.ThisAddIn.TaskPane.Visible = ((RibbonToggleButton)sender).Checked;
    }


  private void ExcelEvents_WorkbookActivate(Excel.Workbook wb)
    {
        var taskPane = (customTaskPanes.Where(kvp => kvp.Key.Target == wb).Select(kvp => kvp.Value).FirstOrDefault());

        if (taskPane == null)
        {
            UcCenlarInvest control = new UcCenlarInvest();
            taskPane = this.CustomTaskPanes.Add(control, "My pane for workbook " + wb.Name);
            customTaskPanes[new WeakReference(wb)] = taskPane;
        }
    }

尝试 2：

所以现在功能区 class 可以获取 TaskPane 但我仍然遇到相同的错误。添加了这个：

  private CustomTaskPane taskPane;
    public CustomTaskPane TaskPane
    {
        get
        {
            //return (customTaskPanes.Where(kvp => kvp.Key.Target == wb).Select(kvp => kvp.Value).FirstOrDefault());
              return pane;
        }
        set
        {
            taskPane = value;
        }
    }

.....

  TaskPane = (customTaskPanes.Where(kvp => kvp.Key.Target == wb).Select(kvp => kvp.Value).FirstOrDefault());

Answer 1

Excel 2016 是单文档界面（SDI），Excel 的单个实例中的每个工作簿都包含自己的功能区UI。 more information

如果您打开一个新的工作簿，会出现一个新的功能区，但是指向任务窗格的指针会丢失。您应该实施 WorkbookActivate 事件并添加一个新的任务窗格（如果尚不存在任务窗格）。您还应该保留指向自定义任务窗格的静态指针列表。

查看此解决方案：CustomTaskPane in Excel doesn't appear in new Workbooks

Answer 2

您也可以通过检查任务窗格控件的 IsDisposed 属性来解决此问题，例如

if (taskPane.CustomTaskPane?.Control.IsDisposed == false)
{
    taskPane.CustomTaskPane.Visible = false;
}

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