Question

我想用Outlook向多个客户发送电子邮件。为此我在我的程序中有一个方法，它迭代收件人，组成邮件正文并将第一条邮件显示为预览。

这是该方法的简化版本：

public void CreateMails(List<InfoMailRecipient> recipients)
{
    Microsoft.Office.Interop.Outlook.Application outlook = new Microsoft.Office.Interop.Outlook.Application();
    foreach (InfoMailRecipient recipient in recipients)
    {
        MailItem mail = outlook.CreateItem(OlItemType.olMailItem);
        mail.SentOnBehalfOfName = "Sending User";
        mail.BCC = recipient.EMailAddress;

        mail.Subject = "TEST";
        mail.BodyFormat = OlBodyFormat.olFormatHTML;
        mail.HTMLBody = "<html><body>test</body></html>";
        mail.Display(true);
    }
}

当显示Outlook消息窗口时，无论我是关闭窗口还是单击“发送”，只要应创建下一个MailItem，我就会收到异常“RPC Server unavailable”。显然是因为Outlook已经关闭。我发现当我删除行

时

mail.Display(true);

然后只需拨打.Send();即可正确发送所有邮件。但随后Outlook保持开放。即使我在.Quit()循环后调用foreach。

如何正确处理此Outlook实例？

更新1 - 手动GC呼叫

public void CreateMails(List<InfoMailRecipient> recipients)
{
    Microsoft.Office.Interop.Outlook.Application outlook = new Microsoft.Office.Interop.Outlook.Application();
    foreach (InfoMailRecipient recipient in recipients)
    {
        MailItem mail = outlook.CreateItem(OlItemType.olMailItem);
        mail.SentOnBehalfOfName = "Sending User";
        mail.BCC = recipient.EMailAddress;

        mail.Subject = "TEST";
        mail.BodyFormat = OlBodyFormat.olFormatHTML;
        mail.HTMLBody = "<html><body>test</body></html>";
        mail.Send();
    }
    outlook.Quit();
    GC.Collect();
    GC.WaitForPendingFinalizers();
}

Outlook一直在运行。

Answer 1

这似乎有用 - 你能告诉我们它是否适合你吗？

    public static void Main(string[] args)
    {
        CreateMails(new List<string>() {"emailaddresshere"});
        Console.WriteLine("finished");
        Console.ReadLine();
    }

    public static void CreateMails(List<string> recipients)
    {
        Microsoft.Office.Interop.Outlook.Application outlook = new Microsoft.Office.Interop.Outlook.Application();
        foreach (string recipient in recipients)
        {
            MailItem mail = outlook.CreateItem(OlItemType.olMailItem);
            mail.SentOnBehalfOfName = "Sending User";
            mail.BCC = recipient;

            mail.Subject = "TEST";
            mail.BodyFormat = OlBodyFormat.olFormatPlain;
            mail.HTMLBody = "Hello";
            mail.Send();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(mail); // key change
        }
        GC.Collect();
        GC.Collect();
        GC.WaitForPendingFinalizers();
        outlook.Application.Quit();
        outlook.Quit();
        System.Runtime.InteropServices.Marshal.ReleaseComObject(outlook); // key change
        outlook = null;
        GC.Collect();
        GC.Collect();
        GC.WaitForPendingFinalizers();
    }

同时阅读https://ausdotnet.wordpress.com/category/technical/com-interop/和How to close outlook after automating it in c#。

使用Outlook生成多个邮件

1 个答案: