Outlook ItemAdd事件未始终触发

Question

我正在尝试确定收到的邮件是否是垃圾邮件。 Itemadd事件只工作一次。它不会始终触发。

我该如何解决这个问题？

我这样做：

public partial class ThisAddIn
{

    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        Outlook.MAPIFolder inbox = Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);
        inbox.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(InboxFolderItemAdded);
    }

    private void InboxFolderItemAdded(object Item)
    {
        if (Item is Outlook.MailItem)
        {
            Debug.WriteLine("I'm in!");
            Outlook.MailItem mail = (Outlook.MailItem)Item;
            int[] answer = Predict(mail);

            if(answer[0] == 0) // Not spam
            {
                Outlook.MAPIFolder inboxFolder = ((Outlook.MAPIFolder)this.Application.ActiveExplorer().Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox));
                mail.Move(inboxFolder);
            }

            else if(answer[0] == 1) // Spam
            {
                Outlook.MAPIFolder junkFolder = ((Outlook.MAPIFolder)this.Application.ActiveExplorer().Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderJunk));
                mail.Move(junkFolder);
            }
        }
    }

    private int[] Predict(Outlook.MailItem mailBody)
    {
        Debug.WriteLine("I'm inside in predict function");
        double[]feature = featureExtraction.findFeatureIncomingMail(mailBody.Body);
        int[] answer = tree.Decide(feature);
        return answer;
    }
}

当我发送自己的邮件时，“我在”和“我在预测功能里面”只在调试控制台中显示一次。

Answer 1

首先，您的代码将无法编译 - ItemAdd对象上没有MAPIFolder事件。它由Items对象暴露（从MAPIFolder.Items属性返回）。

其次，引发事件的对象（Items）必须保持活动状态 - 在类级别声明它，而不是作为局部变量，当ThisAddIn_Startup方法退出时垃圾收集器释放它。

Answer 2

工作代码就像

 public partial class ThisAddIn
 {
    Outlook.Items items=null;
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
     Outlook.MAPIFolder inbox = 
    Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);
    items=inbox.Items;
    items.ItemAdd += new 
    Outlook.ItemsEvents_ItemAddEventHandler(InboxFolderItemAdded);
}

private void InboxFolderItemAdded(object Item)
{
    if (Item is Outlook.MailItem)
    {
        Debug.WriteLine("I'm in!");
        Outlook.MailItem mail = (Outlook.MailItem)Item;
        int[] answer = Predict(mail);

        if(answer[0] == 0) // Not spam
        {
            Outlook.MAPIFolder inboxFolder = ((Outlook.MAPIFolder)this.Application.ActiveExplorer().Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox));
            mail.Move(inboxFolder);
        }

        else if(answer[0] == 1) // Spam
        {
            Outlook.MAPIFolder junkFolder = ((Outlook.MAPIFolder)this.Application.ActiveExplorer().Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderJunk));
            mail.Move(junkFolder);
        }
    }
}

private int[] Predict(Outlook.MailItem mailBody)
{
    Debug.WriteLine("I'm inside in predict function");
    double[]feature = featureExtraction.findFeatureIncomingMail(mailBody.Body);
    int[] answer = tree.Decide(feature);
    return answer;
 }
}