VSTO Outlook：为由主题行确定的邮件项目创建动态自定义上下文菜单

Question

是否可以通过检查项目的内容来将不同的项目添加到邮件项目自定义上下文菜单？
例如，仅当主题行包含“重要”时才添加该项目。

Answer 1

这似乎有效。

void Application_ItemContextMenuDisplay(Office.CommandBar CommandBar, Outlook.Selection Selection)
    {
        foreach (Outlook.MailItem m in Selection)
        {
            if (m.Subject.Contains("IMPORTANT"))
            {
                DeliveryFailureButton(CommandBar, Selection);
                break;
            }
        }
    }

    void DeliveryFailureButton(Office.CommandBar CommandBar, Outlook.Selection Selection)
    {
        Office.CommandBarButton btn = CommandBar.Controls.Add(
              Office.MsoControlType.msoControlButton,
              missing, missing, missing, true) as
              Office.CommandBarButton;
        btn.Caption = "Move to IMPORTANT messages";

        btn.Click += (Office.CommandBarButton Ctrl, ref bool CancelDefault) =>
        {
            string msg = "CRM Records\r\n";

            foreach (Outlook.MailItem item in Selection)
            {
                if (item is Outlook.MailItem)
                {
                    var mitem = item as Outlook.MailItem;
                    msg += "\r\n" + MoveToImportant(mitem);
                }
            }

            MessageBox.Show(msg);

        };
    }