/// <summary>
/// 获取该邮件的 Base64 编码方式编码结果，当未设置姓名时，姓名即为邮件地址
/// </summary>
/// <param name="enc">要进行编码的编码类型</param>
/// <param name="Charset">文件编码字符集</param>
internal protected virtual string Base64Encoding(Encoding enc, string Charset)
{
//判断姓名是否为空
if (string.IsNullOrEmpty(this.Name))
{
return(string.Format("\"{0}\" <{0}>", this.Address));
}
//判断姓名是否为键盘可打印，如果是，则不进行编码，如果不是，则进行编码
if (MailCommon.IsAscii(this.Name))
{
return(string.Format("\"{0}\" <{1}>", this.Name, this.Address));
}
//进行编码输出
return(Coding.EncodBase64Head(this.Name, enc, Charset) + string.Format(" <{0}>", this.Address));
}
/// <summary>
/// 获取附件的Mime头
/// </summary>
/// <param name="NextPart">邮件分隔符</param>
/// <param name="enc">字符编码类型</param>
/// <param name="Charset">文件编码字符集</param>
public string MimeHead(string NextPart, Encoding enc, string Charset)
{
StringBuilder sb = new StringBuilder();
//加入分隔
sb.Append("--");
sb.Append(NextPart + MailCommon.NewLine);
if (!string.IsNullOrEmpty(this.ContentID))
{
sb.AppendFormat("Content-ID: <{0}>", this.ContentID);
sb.Append(MailCommon.NewLine);
}
sb.AppendFormat("Content-Type: {0};", this.MimeType);
sb.Append(MailCommon.NewLine);
string temp = "";
//判断文件名称是否须要编码
if (MailCommon.IsAscii(this.Name))
{
temp = string.Format("=\"{0}\"", this.Name);
}
else
{
temp = string.Format("=\"{0}\"", Coding.EncodBase64Head(this.Name, enc, Charset));
}
sb.Append(" name" + temp + MailCommon.NewLine);
sb.Append("Content-Transfer-Encoding: base64" + MailCommon.NewLine);
sb.Append("Content-Disposition: attachment;" + MailCommon.NewLine);
sb.Append(" filename" + temp + MailCommon.NewLine);
sb.Append(MailCommon.NewLine + MailCommon.NewLine);
return(sb.ToString());
}
/// <summary>
/// 进行邮件头的读取
/// </summary>
/// <returns>返回所生成的邮件头值</returns>
internal protected virtual string ReadHead()
{
if (this.From == null || string.IsNullOrEmpty(this.From.Address) || this.To == null || this.To.Count == 0)
{
throw new InvalidOperationException("Message Not Set From Or To !");
}
if (string.IsNullOrEmpty(this.Subject))
{
throw new InvalidOperationException("Not Set Subject!");
}
StringBuilder sb = new StringBuilder();
//写入邮件ID
sb.Append(this.MessageID + MailCommon.NewLine);
//from
sb.Append("From: ");
sb.Append(this.EncodeType == MailEncodeType.BASE64 ? this.From.Base64Encoding(this.Charset, this.SetCharset) : this.From.QPEncoding(this.Charset, this.SetCharset));
sb.Append(MailCommon.NewLine);
//replay
if (this.replyto != null)
{
sb.Append("Replay-To: ");
sb.Append(this.EncodeType == MailEncodeType.BASE64 ? this.ReplyTo.Base64Encoding(this.Charset, this.SetCharset) : this.ReplyTo.QPEncoding(this.Charset, this.SetCharset));
sb.Append(MailCommon.NewLine);
}
//to
sb.Append("To: ");
sb.Append(this.CreateAddressList(this.To));
sb.Append(MailCommon.NewLine);
//cc
if (this.Cc != null && this.Cc.Count > 0)
{
sb.Append("CC: ");
sb.Append(this.CreateAddressList(this.Cc));
sb.Append(MailCommon.NewLine);
}
//Subject
sb.Append("Subject: ");
if (MailCommon.IsAscii(this.Subject))
{
sb.Append(this.Subject);
}
else
{
sb.Append(this.EncodeType == MailEncodeType.BASE64 ? Coding.EncodBase64Head(this.Subject, this.Charset, this.SetCharset) : Coding.EncodQPHead(this.Subject, this.Charset, this.SetCharset));
}
sb.Append(MailCommon.NewLine);
//Data
sb.Append("Date: ");
sb.Append(DateTime.Now.ToString("R"));
sb.Append(MailCommon.NewLine);
//Mime
sb.Append(MailCommon.MimeVersion);
sb.Append(MailCommon.NewLine);
//Notification
if (this.Notification != null)
{
sb.Append("Disposition-Notification-To: ");
sb.Append(this.EncodeType == MailEncodeType.BASE64 ? this.Notification.Base64Encoding(this.Charset, this.SetCharset) : this.Notification.QPEncoding(this.Charset, this.SetCharset));
sb.Append(MailCommon.NewLine);
}
//priority
sb.Append("X-Priority: ");
sb.Append((int)this.Priority);
sb.Append(MailCommon.NewLine);
sb.Append("X-MSMail-Priority: ");
sb.Append(this.Priority.ToString());
sb.Append(MailCommon.NewLine);
//Mailer
sb.Append(MailCommon.XMailer);
sb.Append(MailCommon.NewLine);
//Content-Type
sb.Append(CreateContentType());
sb.Append(MailCommon.NewLine);
//自定Headers
if (this.headers != null)
{
for (int i = 0; i < this.headers.Count; i++)
{
sb.Append(this.headers[i].ToString());
sb.Append(MailCommon.NewLine);
}
}
sb.Append(MailCommon.NewLine);
return(sb.ToString());
}