Question

我尝试过本网站上提供的许多解决方案，将文件附加到电子邮件中，但无论我尝试什么，我总是得到“抱歉，出了点问题。你可能想再试一次”的消息我尝试将文件附加到outlook mailitem的行。

  try
        {
            App = new Microsoft.Office.Interop.Outlook.Application();

            MailItem mailItem = App.CreateItem(OlItemType.olMailItem);

            mailItem.Subject = Subject;
            mailItem.To = To;
            mailItem.CC = CC;
            mailItem.BCC = BCC;
            mailItem.Body = Body;

            // make sure a filename was passed
            if (string.IsNullOrEmpty(FileAtachment) == false)
            {
                // need to check to see if file exists before we attach !
                if (!File.Exists(FileAtachment))
                    MessageBox.Show("Attached document " + FileAtachment + " does not exist", "File Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                else
                {
                    System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(FileAtachment);
                    mailItem.Attachments.Add(attachment, Microsoft.Office.Interop.Outlook.OlAttachmentType.olByValue, Type.Missing, Type.Missing);
                }
            }
            mailItem.Display();     // display the email
        }
        catch (System.Exception ex)
        {
            MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }

任何人都可以提供任何想法如何让它工作？我可以毫无问题地发送电子邮件，但是当我尝试添加附件时它不起作用：（

Answer 1

Attachments.Add方法接受一个文件（由带文件名的完整文件系统路径表示）或构成附件的Outlook项目，但不接受附件对象：

        App = new Microsoft.Office.Interop.Outlook.Application();

        MailItem mailItem = App.CreateItem(OlItemType.olMailItem);

        mailItem.Subject = Subject;
        mailItem.To = To;
        mailItem.CC = CC;
        mailItem.BCC = BCC;
        mailItem.Body = Body;

        // make sure a filename was passed
        if (string.IsNullOrEmpty(FileAtachment) == false)
        {
            // need to check to see if file exists before we attach !
            if (!File.Exists(FileAtachment))
                MessageBox.Show("Attached document " + FileAtachment + " does not exist", "File Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            else
            {
                Attachment attachment = mailItem.Attachments.Add("D:\\text.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olByValue, Type.Missing, Type.Missing);
            }
        }
        mailItem.Display();     // display the email

Answer 2

我正在使用Outlook 2016，对我来说，在添加附件之前显示邮件就可以了（只要附件是有效的文件路径）

    App = new Microsoft.Office.Interop.Outlook.Application();

    MailItem mailItem = App.CreateItem(OlItemType.olMailItem);

    mailItem.Subject = Subject;
    mailItem.To = To;
    mailItem.CC = CC;
    mailItem.BCC = BCC;
    mailItem.Body = Body;

    // display the item before adding the attachments
    mailItem.Display();     // display the email

    // make sure a filename was passed
    if (string.IsNullOrEmpty(FileAtachment) == false)
    {
        // need to check to see if file exists before we attach !
        if (!File.Exists(FileAtachment))
            MessageBox.Show("Attached document " + FileAtachment + " does not exist", "File Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        else
        {
            Attachment attachment = mailItem.Attachments.Add("D:\\text.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olByValue, Type.Missing, Type.Missing);
        }
     }

Answer 3

Attachments.Add需要一个字符串作为参数。该字符串必须是您要附加的文件的标准名称。

将流保存到临时文件，将文件名传递给Attachments。添加，删除文件。

您可以从https://social.msdn.microsoft.com/Forums/vstudio/en-US/17efe46b-18fe-450f-9f6e-d8bb116161d8/attach-stream-data-with-outlook-mail-client?forum=outlookdev

获取详细信息

将文件附加到电子邮件C＃

3 个答案: