事件处理程序未添加到新邮件项目

本文关键字:新邮件 项目 添加 程序 事件处理 | 更新日期: 2023-09-27 18:11:40

我正在尝试创建一个简单的Outlook 2010插件来响应新的附件事件。下面的代码只有在取消注释MessageBox时才有效。显示行。但删除后,似乎没有添加事件处理程序。关于程序流,我遗漏了什么,这意味着模态消息框会影响事件处理程序的位置?

public partial class ThisAddIn
{
    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        Application.Inspectors.NewInspector += Inspectors_NewInspector;
    }
    void Inspectors_NewInspector(Outlook.Inspector Inspector)
    {
        Outlook.MailItem mailItem = Inspector.CurrentItem as Outlook.MailItem;
        if (mailItem != null)
        {
            if (mailItem.EntryID == null)
            {
                mailItem.BeforeAttachmentAdd += mailItem_BeforeAttachmentAdd;
                //System.Windows.Forms.MessageBox.Show("Twice");
            }
        }
    }
    void mailItem_BeforeAttachmentAdd(Outlook.Attachment Attachment, ref bool Cancel)
    {
        Cancel = true;
    }
    private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
    {
    }

事件处理程序未添加到新邮件项目

引发事件的COM对象必须是活动的。在你的情况下,你正在使用多个点符号和编译器创建一个隐式变量;一旦该变量被垃圾收集,它将停止触发事件。对于邮件项目也是如此—您将需要捕获检查员。关闭事件并从_mailItems列表中删除项目;

public partial class ThisAddIn
{
    private Inspectors _inspectors;
    private List<MailItem> _mailItems = new List<MailItem>();
    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        _inspectors = Application.Inspectors;
        _inspectors.NewInspector += Inspectors_NewInspector;
    }
    void Inspectors_NewInspector(Outlook.Inspector Inspector)
    {
        Outlook.MailItem mailItem = Inspector.CurrentItem as Outlook.MailItem;
        if (mailItem != null)
        {
            if (mailItem.EntryID == null)
            {
                _mailItems.Add(mailItem):
                mailItem.BeforeAttachmentAdd += mailItem_BeforeAttachmentAdd;
                //System.Windows.Forms.MessageBox.Show("Twice");
            }
        }
    }
    void mailItem_BeforeAttachmentAdd(Outlook.Attachment Attachment, ref bool Cancel)
    {
        Cancel = true;
    }
    private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
    {
    }