c# - 在 C# 中为 Gmail API 创建消息

Question

我正在考虑在我正在开发的应用程序中使用 Gmail API。但是，我不确定如何将他们的 Java 或 Python 示例更改为 C#。现有样本究竟如何转换？

Sample found here.

Answer 1

这是我能够开始工作的，使用 MimeKit .

public void SendEmail(MyInternalSystemEmailMessage email)
{
    var mailMessage = new System.Net.Mail.MailMessage();
    mailMessage.From = new System.Net.Mail.MailAddress(email.FromAddress);
    mailMessage.To.Add(email.ToRecipients);
    mailMessage.ReplyToList.Add(email.FromAddress);
    mailMessage.Subject = email.Subject;
    mailMessage.Body = email.Body;
    mailMessage.IsBodyHtml = email.IsHtml;

    foreach (System.Net.Mail.Attachment attachment in email.Attachments)
    {
        mailMessage.Attachments.Add(attachment);
    }

    var mimeMessage = MimeKit.MimeMessage.CreateFromMailMessage(mailMessage);

    var gmailMessage = new Google.Apis.Gmail.v1.Data.Message {
        Raw = Encode(mimeMessage)
    };

    Google.Apis.Gmail.v1.UsersResource.MessagesResource.SendRequest request = service.Users.Messages.Send(gmailMessage, ServiceEmail);

    request.Execute();
}

public static string Encode(MimeMessage mimeMessage)
{
    using (MemoryStream ms = new MemoryStream())
    {
        mimeMessage.WriteTo(ms);
        return Convert.ToBase64String(ms.GetBuffer())
            .TrimEnd('=')
            .Replace('+', '-')
            .Replace('/', '_');
    }
}

注意:如果您遇到电子邮件退回问题，可能是因为没有设置 ReplyToList 字段。请参阅:GMail API Emails Bouncing