我正在开发一个可以发送带有附件的电子邮件的应用程序,它可以工作,直到我尝试使用特殊字符æ,ø,å。
我玩了一些测试不同的编码,看起来这个主题是用ISO-8859-1编码的,而其余的邮件是用UTF-8编码的。
以下是我生成Google Gmail API消息的方法
public Message CreateMessage(string to, string from, string body, string subject, GmailService service, string[] files = null, string bcc = null)
{
AE.Net.Mail.MailMessage message = new AE.Net.Mail.MailMessage()
{
Subject = subject,
Body = body,
From = new MailAddress(from),
};
message.To.Add(new MailAddress(to));
message.ReplyTo.Add(message.From);
message.Headers.Add("Content-Type", "text/plain; charset=utf-8");
if (bcc != null)
message.Bcc.Add(new MailAddress(bcc));
if (files != null)
{
foreach(string file in files)
{
using (var opennedFile = File.Open(file, FileMode.Open, FileAccess.Read))
using (MemoryStream stream = new MemoryStream())
{
string[] FileName = file.Split('\\');
opennedFile.CopyTo(stream);
message.Attachments.Add(new AE.Net.Mail.Attachment(stream.ToArray(), MediaTypeNames.Application.Octet, FileName[FileName.Length - 1], true));
}
}
}
var msgStr = new StringWriter();
message.Save(msgStr);
return new Message() {
Raw = Base64UrlEncode(msgStr.ToString()),
};
}
private static string Base64UrlEncode(string message)
{
var inputBytes = Encoding.GetEncoding("utf-8").GetBytes(message);
return Convert.ToBase64String(inputBytes).Replace('+', '-').Replace('/', '_').Replace("=", "");
}
message.ContentType =“text / plain; charset = utf-8”无法修复此问题,并使附加文件在正文中显示为Base64
答案 0 :(得分:0)
您可以使用the following technique在主题标题中使用UTF-8。
=?charset?encoding?encoded-text?=
然后,您可以使用charset=utf-8
,encoding=B
(B = base64),编码主题为encoded-text
。
示例强>
Subject: =?utf-8?B?aGVsbG8=?= // 'aGVsbG8=' is 'hello' in base64 format.