c# - 将文件附加到电子邮件 C#

Question

我已经尝试了本网站提供的许多解决方案来将文件附加到电子邮件，但无论我尝试什么，我总是在我尝试将文件附加到我的 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吗？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方法接受构成附件的文件(由带文件名的完整文件系统路径表示)或 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