共享邮箱上的 MailItem.GetConversation()

我正在使用以下代码来显示对话中原始电子邮件的属性。

void DemoConversation()
{
    object selectedItem = 
        Application.ActiveExplorer().Selection[1];
    // For this example, you will work only with 
    //MailItem. Other item types such as
    //MeetingItem and PostItem can participate 
    //in Conversation.
    if (selectedItem is Outlook.MailItem)
    {
        // Cast selectedItem to MailItem.
        Outlook.MailItem mailItem =
            selectedItem as Outlook.MailItem; ;
        // Determine store of mailItem.
        Outlook.Folder folder = mailItem.Parent
            as Outlook.Folder;
        Outlook.Store store = folder.Store;
        if (store.IsConversationEnabled == true)
        {
            // Obtain a Conversation object.
            Outlook.Conversation conv =
                mailItem.GetConversation();
            // Check for null Conversation.
            if (conv != null)
            {
                // Obtain Table that contains rows 
                // for each item in Conversation.
                Outlook.Table table = conv.GetTable();
                Debug.WriteLine("Conversation Items Count: " +
                    table.GetRowCount().ToString());
                Debug.WriteLine("Conversation Items from Table:");
                while (!table.EndOfTable)
                {
                    Outlook.Row nextRow = table.GetNextRow();
                    Debug.WriteLine(nextRow["Subject"]
                        + " Modified: "
                        + nextRow["LastModificationTime"]);
                }
                Debug.WriteLine("Conversation Items from Root:");
                // Obtain root items and enumerate Conversation.
                Outlook.SimpleItems simpleItems 
                    = conv.GetRootItems();
                foreach (object item in simpleItems)
                {
                    // In this example, enumerate only MailItem type.
                    // Other types such as PostItem or MeetingItem
                    // can appear in Conversation.
                    if (item is Outlook.MailItem)
                    {
                        Outlook.MailItem mail = item
                            as Outlook.MailItem;
                        Outlook.Folder inFolder =
                            mail.Parent as Outlook.Folder;
                        string msg = mail.Subject
                            + " in folder " + inFolder.Name;
                        Debug.WriteLine(msg);
                    }
                    // Call EnumerateConversation 
                    // to access child nodes of root items.
                    EnumerateConversation(item, conv);
                }
            }
        }
    }
}

void EnumerateConversation(object item,
    Outlook.Conversation conversation)
{
    Outlook.SimpleItems items =
        conversation.GetChildren(item);
    if (items.Count > 0)
    {
        foreach (object myItem in items)
        {
            // In this example, enumerate only MailItem type.
            // Other types such as PostItem or MeetingItem
            // can appear in Conversation.
            if (myItem is Outlook.MailItem)
            {
                Outlook.MailItem mailItem =
                    myItem as Outlook.MailItem;
                Outlook.Folder inFolder =
                    mailItem.Parent as Outlook.Folder;
                string msg = mailItem.Subject
                    + " in folder " + inFolder.Name;
                Debug.WriteLine(msg);
            }
            // Continue recursion.
            EnumerateConversation(myItem, conversation);
        }
    }
}

它在我的个人收件箱和作为附加收件箱添加的共享邮箱上运行良好。

但我拥有完全访问权限但在 Outlook 客户端中自动映射的所有其他共享邮箱不起作用。

有谁知道如果mailItem.GetConversation()应该与未添加为附加帐户但自动映射的共享邮箱一起使用吗？

因为在这些共享邮箱上，我得到Conversation Items Count: 0即使同一对话中还有其他电子邮件。

谢谢。

它在我的个人收件箱和作为附加收件箱添加的共享邮箱上运行良好。

您似乎只是在配置文件中添加了第二个帐户，而不是共享邮箱。

GetConversation回报Null（在 Visual Basic 中什么都没有）如果该项目不存在对话。如果存储不支持对话视图（例如，Outlook 在经典联机模式下针对早于 Microsoft Exchange Server 2010 的 Microsoft Exchange 版本运行），则项目不存在对话。

Use the 是否启用对话 https://learn.microsoft.com/en-us/office/vba/api/outlook.store.isconversationenabled的财产Store对象来判断商店是否支持Conversation view and GetConversation应该可以工作。