单击自定义按钮时不会触发 Outlook 事件

Question

我正在开发一个 Microsoft Outlook 插件，我在“插件”选项卡名称中添加了一个按钮OPENISMS。我可以看到该按钮，但是单击时事件不会被触发。我不知道它为什么会这样。请在下面找到添加按钮并向其附加事件的代码。任何帮助将不胜感激。

private void AddButtonToNewDropdown()
{
    Office.CommandBar commandBar = this.Application.ActiveExplorer().CommandBars["Standard"];
    Office.CommandBarControl ctl = commandBar.Controls["&New"];
    if (ctl is Office.CommandBarPopup) 
    {
        Office.CommandBarButton commandBarButton;
        Office.CommandBarPopup newpopup = (Office.CommandBarPopup)ctl;
        commandBarButton = (Office.CommandBarButton)newpopup.Controls.Add(1, missing, missing, missing, true);
        commandBarButton.Caption = "OpenISMS";
        commandBarButton.Tag = "OpenISMS";
        commandBarButton.FaceId = 6000;
        //commandBarButton.Enabled = false;
                      commandBarButton.OnAction = "OpenISMSThruMail.ThisAddIn.ContextMenuItemClicked";
        commandBarButton.Click += new Office._CommandBarButtonEvents_ClickEventHandler(ContextMenuItemClicked); 
    }

}
private void ContextMenuItemClicked(CommandBarButton Ctrl, ref bool CancelDefault)
{
    if (currentExplorer.Selection.Count > 0)
    {
        object selObject = currentExplorer.Selection[1];
        if (selObject is MailItem)
        {
            // do your stuff with the selected message here
            MailItem mail = selObject as MailItem;
            MessageBox.Show("Message Subject: " + mail.Subject);
        }
    }
} 

我正在AddButtonToNewDropdown()从事件中调用方法ThisAddIn_Startup。

Answer 1

您需要CommandBarButton在范围内创建类成员变量 - 否则它将被垃圾收集，并且事件不会像您所观察到的那样触发。

public class ThisAddIn
{
   Office.CommandBarButton commandBarButton;

   private void AddButtonToNewDropdown()
   {
     // ...
   }
}

请参阅有关类似问题的相关 SO 帖子。