/// <summary>
/// Creates a new SMTP email message.
/// </summary>
/// <param name="from">From Mail Box object.</param>
/// <param name="to">To Mail Box object.</param>
/// <param name="cc">CC Mailbox object.</param>
/// <param name="subject">Subject line.</param>
/// <param name="body">Message body.</param>
/// <param name="filesToAttach">Files that has to be attached</param>
public SmtpMessage(MailBox from, MailBox to, MailBox cc, string subject, string body, List<string> filesToAttach=null)
{
Initialize();
From = from;
if (!String.IsNullOrEmpty(to.EmailAddress))
{
To.Add(to);
}
if (cc != null && !string.IsNullOrEmpty(cc.EmailAddress))
{
Cc.Add(cc);
}
Subject = subject;
Body = body;
if (filesToAttach != null)
{
HasAttachments = true;
AttachedFiles = filesToAttach;
}
}
/// <summary>
/// Creates the SMTP message body.
/// </summary>
/// <returns>The string representation of the message.</returns>
public async Task <string> CreateMessageBody()
{
if (From == null)
{
throw new Exception("From field is missing.");
}
if (To.Count == 0)
{
throw new Exception("To field is missing.");
}
StringBuilder message = new StringBuilder();
message.AppendFormat("Date: {0}{1}", DateTime.Now.ToString(DATE_FORMAT), System.Environment.NewLine);
message.AppendFormat("X-Priority: {0}{1}", ((byte)Priority).ToString(), System.Environment.NewLine);
message.AppendFormat("From: \"{0}\"<{1}>{2}", From.Name, From.EmailAddress, System.Environment.NewLine);
message.Append("To: ");
for (int i = 0; i < To.Count; i++)
{
MailBox to = To[i];
string separator = i == To.Count - 1 ? Environment.NewLine : ", ";
message.AppendFormat("\"{0}\"<{1}>{2}", to.Name, to.EmailAddress, separator);
}
if (Cc.Count > 0)
{
message.Append("Cc: ");
}
for (int i = 0; i < Cc.Count; i++)
{
MailBox cc = Cc[i];
string separator = i == Cc.Count - 1 ? Environment.NewLine : ", ";
message.AppendFormat("\"{0}\"<{1}>{2}", cc.Name, cc.EmailAddress, separator);
}
if (Cc.Count > 0)
{
message.AppendFormat("{0}", Environment.NewLine);
}
message.AppendFormat("Subject: {0}{1}", Subject, Environment.NewLine);
message.AppendFormat("MIME-Version: 1.0{0}", Environment.NewLine);
if (HasAttachments)
{
message.AppendFormat("Content-Type: multipart/mixed; boundary=\"{0}\"{1}", Boundary, Environment.NewLine);
message.AppendFormat("{0}", Environment.NewLine);
message.AppendFormat("--{0}{1}", Boundary, Environment.NewLine);
}
if (IsHtml)
{
message.AppendFormat("Content-Type: text/html; {0}", System.Environment.NewLine);
}
else
{
message.AppendFormat("Content-Type: text/plain; charset=\"{0}\"{1}", Encoding.WebName, System.Environment.NewLine);
}
message.Append(Environment.NewLine);
message.Append(Body);
message.Append(Environment.NewLine);
message.Append(Environment.NewLine);
if (HasAttachments)
{
foreach (string file in AttachedFiles)
{
message.AppendFormat("--{0}{1}", Boundary, Environment.NewLine);
message.AppendFormat("Content-Type: application/octet-stream;{0}", Environment.NewLine);
message.AppendFormat("Content-Transfer-Encoding: base64{0}", Environment.NewLine);
string filename = _findFileName(file);
message.AppendFormat("Content-Disposition: attachment; filename= \"" + filename + "\" {0}", Environment.NewLine);
string fileEncoded = await _encodeToBase64(file);
message.Append(Environment.NewLine);
message.Append(fileEncoded);
message.Append(Environment.NewLine);
}
message.AppendFormat("--{0}--{1}", Boundary, Environment.NewLine);
}
message.Append(".");
return(message.ToString());
}
/// <summary>
/// Sends the specified email message.
/// </summary>
/// <param name="from">The sender's email address.</param>
/// <param name="to">The receiver's email address.</param>
/// <param name="subject">The subject line of the email.</param>
/// <param name="message">The message body of the email.</param>
/// <returns>True if the message was sent successfully. False otherwise.</returns>
public async Task<bool> SendAsync(MailBox from, MailBox to, string subject, string message)
{
From = from;
To = to;
Subject = subject;
Message = message;
bool result = await SendAsync();
return result;
}