深入Lumisoft.NET組件與.NET API實現郵件發送功能的對比分析_.Net教程

推薦：深入Lumisoft.NET實現郵件發送功能的方法詳解
本篇文章對使用Lumisoft.NET實現郵件發送功能的方法機型了詳細的分析介紹。需要的朋友參考下

我在另一篇文章《》有大致對這個Lumisoft .NET組件的使用進行了介紹，當然Lumisoft.NET組件除了提供郵件發送功能外，還提供了郵件接收等功能的處理（包括基于POP3協議和IMAP協議），而.NET則除了提供SMTP協議功能外，則沒有提供POP3協議處理的相關類庫，因此收取郵件這需要自己進行封裝（需要也可以參考codeproject.com上的相關文章）。

1、.NET的郵件發送功能實現
.NET本身封裝了一個SmtpClient類以及相關的郵件對象類，這樣利用這些類庫，也可以方便實現郵件的發送功能的了。

如添加發送人地址，抄送地址，以及暗送地址（多個地址用逗號分開）代碼如下。

復制代碼代碼如下:www.zhaotila.cn

string toEmails = mailInfo.ToEmail;

string bcc = "";
mailInfo.RecipientBCC.ForEach(obj => bcc += string.Format("{0},", obj));
bcc = bcc.Trim(',');

string cc = "";
mailInfo.RecipientCC.ForEach(obj => cc += string.Format("{0},", obj));
cc = cc.Trim(',');

MailMessage mail = new MailMessage(settingInfo.MailFrom, toEmails);
if (!string.IsNullOrEmpty(bcc))
{
mail.Bcc.Add(bcc);
}
if (!string.IsNullOrEmpty(cc))
{
mail.CC.Add(cc);
}

.NET的附件和嵌入式資源由對象Attachment和LinkedResource進行管理，他們的利用代碼如下所示：

復制代碼代碼如下:www.zhaotila.cn

//附件
foreach (string fileName in mailInfo.Attachments)
{
mail.Attachments.Add(new Attachment(fileName));
}

//嵌入資源
AlternateView view = AlternateView.CreateAlternateViewFromString(mailInfo.Body, Encoding.UTF8, MediaTypeNames.Text.Html);
foreach (LinkedAttachementInfo link in mailInfo.EmbedObjects)
{
LinkedResource resource = new LinkedResource(link.Stream, link.MimeType);
resource.ContentId = link.ContentId;
view.LinkedResources.Add(resource);
}
mail.AlternateViews.Add(view);

發送郵件的其他部分代碼如下所示

復制代碼代碼如下:www.zhaotila.cn

mail.IsBodyHtml = mailInfo.IsBodyHtml;
mail.BodyEncoding = Encoding.UTF8;
mail.Subject = mailInfo.Subject;
mail.SubjectEncoding = Encoding.UTF8;

//發送賬戶設置信息
SmtpClient client = new SmtpClient();
client.Host = settingInfo.SmtpServer;
client.Port = settingInfo.SmptPort;
client.UseDefaultCredentials = false;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.Credentials = new NetworkCredential(settingInfo.SmtpUser, settingInfo.SmtpPass);

bool success = false;
try
{
client.Send(mail);
success = true;
}
catch (Exception ex)
{
LogTextHelper.Error(ex);
//throw;
}

上面利用.net的SmtpClient發送郵件操作的完整代碼如下:

復制代碼代碼如下:www.zhaotila.cn

/// <summary>
/// 發送外部郵件（系統配置，系統郵件）
/// </summary>
/// <param name="mailInfo">發送郵件信息</param>
/// <returns></returns>
public CommonResult Send(MailInfo mailInfo)
{
CommonResult result = new CommonResult();
try
{
AppConfig config = new AppConfig();
string MailDomain = config.AppConfigGet("MailDomain");
string MailUsername = config.AppConfigGet("MailUsername");
string MailPassword = config.AppConfigGet("MailPassword");
string MailPort = config.AppConfigGet("MailPort");
string MailFrom = config.AppConfigGet("MailFrom");
int port = 25;
int.TryParse(MailPort, out port);

SmtpSettingInfo settingInfo = new SmtpSettingInfo(MailDomain, port,
MailUsername, MailPassword, MailFrom);

result.Success = PrivateSendEmail(mailInfo, settingInfo);
}
catch (Exception ex)
{
result.ErrorMessage = ex.Message;
throw;
}

return result;
}

/// <summary>
/// 通用發送郵件操作
/// </summary>
private static bool PrivateSendEmail(MailInfo mailInfo, SmtpSettingInfo settingInfo)
{
string toEmails = mailInfo.ToEmail;

string bcc = "";
mailInfo.RecipientBCC.ForEach(obj => bcc += string.Format("{0},", obj));
bcc = bcc.Trim(',');

string cc = "";
mailInfo.RecipientCC.ForEach(obj => cc += string.Format("{0},", obj));
cc = cc.Trim(',');

MailMessage mail = new MailMessage(settingInfo.MailFrom, toEmails);
if (!string.IsNullOrEmpty(bcc))
{
mail.Bcc.Add(bcc);
}
if (!string.IsNullOrEmpty(cc))
{
mail.CC.Add(cc);
}

//附件
foreach (string fileName in mailInfo.Attachments)
{
mail.Attachments.Add(new Attachment(fileName));
}

bool success = false;
try
{
client.Send(mail);
success = true;
}
catch (Exception ex)
{
LogTextHelper.Error(ex);
//throw;
}

string message = string.Format("發送給【{0}】的郵件“{1}”，{2}，時間：{3}",
mailInfo.ToEmail[0], mailInfo.Subject, success ? "發送成功" : "發送失敗", DateTime.Now);
LogTextHelper.Info(message);

return success;
}

2、基于Lumisoft.NET組件的郵件發送功能實現

基于Lumisoft.NET組件的郵件發送，也是一種很常用的，因為這個開源組件非常強大，經�？梢栽谝恍┏绦蛑斜皇褂�。

這個發送郵件的功能主要是利用SMTP_Client類來實現的，如下代碼所示。注意其中的Authenticate函數已經被舍棄，可以使用Auth方法進行驗證。但是函數參數有所不同，根據驗證對象，使用不同的驗證方式，一般選擇AUTH_SASL_Client_Plain對象即可。

復制代碼代碼如下:www.zhaotila.cn

public bool Send()
{
bool sended = false;
using (SMTP_Client client = new SMTP_Client())
{
client.Connect(smtpServer, smtpPort, smtpUseSsl);
client.EhloHelo(smtpServer);
var authhh = new AUTH_SASL_Client_Plain(username, password);
client.Auth(authhh);
//client.Authenticate(username, password);
//string text = client.GreetingText;
client.MailFrom(from, -1);
foreach (string address in toList.Keys)
{
client.RcptTo(address);
}

//采用Mail_Message類型的Stream
Mail_Message m = Create_PlainText_Html_Attachment_Image(toList, ccList, from, fromDisplay, subject, body, attachments);
using (MemoryStream stream = new MemoryStream())
{
m.ToStream(stream, new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q, Encoding.UTF8), Encoding.UTF8);
stream.Position = 0;
client.SendMessage(stream);

sended = true;
}
if (m != null)
{
m.Dispose();
}

client.Disconnect();
}
return sended;
}

構造用于SMTP發送的數據，可以使用Mail_Message 對象，也可以使用Mime對象，雖然讀都可以實現發送功能，不過Mime對象是舍棄的對象了。

構造Mail_Message對象后，創建用于發送的格式要轉換為Stream對象。轉換為發送的Stream操作如下所示。

復制代碼代碼如下:www.zhaotila.cn

using (MemoryStream stream = new MemoryStream())
{
m.ToStream(stream, new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q, Encoding.UTF8), Encoding.UTF8);
stream.Position = 0;
client.SendMessage(stream);

sended = true;
}

構造Mail_Message格式的郵件操作如下所示。

復制代碼代碼如下:www.zhaotila.cn

private Mail_Message Create_PlainText_Html_Attachment_Image(Dictionary<string,string> tomails, Dictionary<string, string> ccmails, string mailFrom, string mailFromDisplay,
string subject, string body, Dictionary<string, string> attachments, string notifyEmail = "", string plaintTextTips = "")
{
Mail_Message msg = new Mail_Message();
msg.MimeVersion = "1.0";
msg.MessageID = MIME_Utils.CreateMessageID();
msg.Date = DateTime.Now;
msg.Subject = subject;
msg.From = new Mail_t_MailboxList();
msg.From.Add(new Mail_t_Mailbox(mailFromDisplay, mailFrom));
msg.To = new Mail_t_AddressList();
foreach (string address in tomails.Keys)
{
string displayName = tomails[address];
msg.To.Add(new Mail_t_Mailbox(displayName, address));
}
msg.Cc = new Mail_t_AddressList();
foreach (string address in ccmails.Keys)
{
string displayName = ccmails[address];
msg.Cc.Add(new Mail_t_Mailbox(displayName, address));
}

//設置回執通知
if (!string.IsNullOrEmpty(notifyEmail) && ValidateUtil.IsEmail(notifyEmail))
{
msg.DispositionNotificationTo.Add(new Mail_t_Mailbox(notifyEmail, notifyEmail));
}

#region MyRegion

//--- multipart/mixed -----------------------------------
MIME_h_ContentType contentType_multipartMixed = new MIME_h_ContentType(MIME_MediaTypes.Multipart.mixed);
contentType_multipartMixed.Param_Boundary = Guid.NewGuid().ToString().Replace('-', '.');
MIME_b_MultipartMixed multipartMixed = new MIME_b_MultipartMixed(contentType_multipartMixed);
msg.Body = multipartMixed;

//--- multipart/alternative -----------------------------
MIME_Entity entity_multipartAlternative = new MIME_Entity();
MIME_h_ContentType contentType_multipartAlternative = new MIME_h_ContentType(MIME_MediaTypes.Multipart.alternative);
contentType_multipartAlternative.Param_Boundary = Guid.NewGuid().ToString().Replace('-', '.');
MIME_b_MultipartAlternative multipartAlternative = new MIME_b_MultipartAlternative(contentType_multipartAlternative);
entity_multipartAlternative.Body = multipartAlternative;
multipartMixed.BodyParts.Add(entity_multipartAlternative);

//--- text/plain ----------------------------------------
MIME_Entity entity_text_plain = new MIME_Entity();
MIME_b_Text text_plain = new MIME_b_Text(MIME_MediaTypes.Text.plain);
entity_text_plain.Body = text_plain;

//普通文本郵件內容，如果對方的收件客戶端不支持HTML，這是必需的
string plainTextBody = "如果你郵件客戶端不支持HTML格式，或者你切換到“普通文本”視圖，將看到此內容";
if (!string.IsNullOrEmpty(plaintTextTips))
{
plainTextBody = plaintTextTips;
}

text_plain.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, plainTextBody);
multipartAlternative.BodyParts.Add(entity_text_plain);

//--- text/html -----------------------------------------
string htmlText = body;//"<html>這是一份測試郵件，<img src=\"cid:test.jpg\">來自LumiSoft.Net</html>";
MIME_Entity entity_text_html = new MIME_Entity();
MIME_b_Text text_html = new MIME_b_Text(MIME_MediaTypes.Text.html);
entity_text_html.Body = text_html;
text_html.SetText(MIME_TransferEncodings.QuotedPrintable, Encoding.UTF8, htmlText);
multipartAlternative.BodyParts.Add(entity_text_html);

//--- application/octet-stream -------------------------
WebClient client = new WebClient();
foreach (string attach in attachments.Keys)
{
try
{
byte[] bytes = client.DownloadData(attach);
using (MemoryStream stream = new MemoryStream(bytes))
{
multipartMixed.BodyParts.Add(Mail_Message.CreateAttachment(stream, attachments[attach]));
}
}
catch (Exception ex)
{
LogTextHelper.Error(ex);
}
}

#endregion

return msg;
}

而構造Mime格式的操作如下所示。

復制代碼代碼如下:www.zhaotila.cn

private Mime Create_Html_Attachment_Image(string mailTo, string mailFrom, string mailFromDisplay,
string subject, string body, List<string> attachments, Dictionary<string, string> embedImages, string notifyEmail = "", string plaintTextTips = "",
string replyEmail = "")
{
Mime m = new Mime();
MimeEntity mainEntity = m.MainEntity;

mainEntity.From = new AddressList();
mainEntity.From.Add(new MailboxAddress(mailFromDisplay, mailFrom));
mainEntity.To = new AddressList();
mainEntity.To.Add(new MailboxAddress(mailTo, mailTo));
mainEntity.Subject = subject;
mainEntity.ContentType = MediaType_enum.Multipart_mixed;

//設置回執通知
if (!string.IsNullOrEmpty(notifyEmail) && ValidateUtil.IsEmail(notifyEmail))
{
mainEntity.DSN = notifyEmail;
}

//設置統一回復地址
if (!string.IsNullOrEmpty(replyEmail) && ValidateUtil.IsEmail(replyEmail))
{
mainEntity.ReplyTo = new AddressList();
mainEntity.ReplyTo.Add(new MailboxAddress(replyEmail, replyEmail));
}

MimeEntity textEntity = mainEntity.ChildEntities.Add();
textEntity.ContentType = MediaType_enum.Text_html;
textEntity.ContentTransferEncoding = ContentTransferEncoding_enum.QuotedPrintable;
textEntity.DataText = body;

//附件
foreach (string attach in attachments)
{
MimeEntity attachmentEntity = mainEntity.ChildEntities.Add();
attachmentEntity.ContentType = MediaType_enum.Application_octet_stream;
attachmentEntity.ContentDisposition = ContentDisposition_enum.Attachment;
attachmentEntity.ContentTransferEncoding = ContentTransferEncoding_enum.Base64;
FileInfo file = new FileInfo(attach);
attachmentEntity.ContentDisposition_FileName = file.Name;
attachmentEntity.DataFromFile(attach);
}

//嵌入圖片
foreach (string key in embedImages.Keys)
{
MimeEntity attachmentEntity = mainEntity.ChildEntities.Add();
attachmentEntity.ContentType = MediaType_enum.Application_octet_stream;
attachmentEntity.ContentDisposition = ContentDisposition_enum.Inline;
attachmentEntity.ContentTransferEncoding = ContentTransferEncoding_enum.Base64;
string imageFile = embedImages[key];
FileInfo file = new FileInfo(imageFile);
attachmentEntity.ContentDisposition_FileName = file.Name;

//string displayName = Path.GetFileNameWithoutExtension(fileName);
attachmentEntity.ContentID = key;//BytesTools.BytesToHex(Encoding.Default.GetBytes(fileName));

attachmentEntity.DataFromFile(imageFile);
}

return m;
}

綜合以上兩者的發送功能，都可以實現郵件的發送操作，如下界面是發送郵件界面。

3、LumiSoft.NET存儲eml郵件文件以及發送eml文件操作

除了上面的發送普通郵件，Lumisoft還支持吧郵件序列號存儲到文件(.eml郵件文件)里面，然后也可以通過把文件讀取到流里面，進行發送，對于某種場合，可以把郵件存儲到eml文件是一個很好的操作。

存儲EML文件的相關操作如下所示。

復制代碼代碼如下:www.zhaotila.cn

private void btnCreateFile_Click(object sender, EventArgs e)
{
string attachFile = Path.Combine(Application.StartupPath, "Attachment/Hotel2.png");
List<string> attachments = new List<string>();
attachments.Add(attachFile);
string subject = "測試郵件";
string body = "<html>這是一份測試郵件，來自LumiSoft.Net</html>";
string bodyEmbedy = "<html>這是一份測試郵件<img src=\"cid:test.jpg\">，來自LumiSoft.Net</html>";
Dictionary<string, string> embedList = new Dictionary<string, string>();
embedList.Add("test.jpg", "C:\\test.jpg");

//存儲為Eml文件
string path = Path.Combine(Application.StartupPath, "Eml");
DirectoryUtil.AssertDirExist(path);
string emlFile = string.Format("{0}/{1}.eml", path, DateTime.Now.ToFileTime());

Mime m = Create_Html_Attachment_Image(to, from, from, subject, bodyEmbedy, attachments, embedList);
m.ToFile(emlFile);

MessageUtil.ShowTips("OK");
}

發送EML文件操作如下所示。

復制代碼代碼如下:www.zhaotila.cn

private void btnSendFile_Click(object sender, EventArgs e)
{
using (SMTP_Client client = new SMTP_Client())
{
int smtpPort = smtpUseSsl ? WellKnownPorts.SMTP_SSL : WellKnownPorts.SMTP;

client.Connect(smtpServer, smtpPort, smtpUseSsl);
client.EhloHelo(smtpServer);
//var authhh = new AUTH_SASL_Client_Plain(username, password);
//client.Auth(authhh);
client.Authenticate(username, password);
//string text = client.GreetingText;
client.MailFrom(from, -1);
client.RcptTo(to);

string path = Path.Combine(Application.StartupPath, "Eml");
string emlFile = Directory.GetFiles(path)[0];
var msg = Mail_Message.ParseFromFile(emlFile);

MemoryStream stream = new MemoryStream();
msg.ToStream(stream, new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q, Encoding.UTF8), Encoding.UTF8);
stream.Position = 0;
client.SendMessage(stream);
client.Disconnect();
}
MessageUtil.ShowTips("OK");
}

分享：深入Lumisoft.NET組件開發碰到亂碼等問題的解決方法
本篇文章介紹了，在Lumisoft.NET組件開發中碰到亂碼等一些問題的解決方法。需要的朋友參考下

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來源：模板無憂/所屬分類：.Net教程/更新時間：2013-05-08

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