深入Lumisoft.NET组件与.NET API实现邮件发送功能的对比分析_asp.net教程-查字典教程网
深入Lumisoft.NET组件与.NET API实现邮件发送功能的对比分析
深入Lumisoft.NET组件与.NET API实现邮件发送功能的对比分析
发布时间:2016-12-29 来源:查字典编辑
摘要:我在另一篇文章《深入Lumisoft.NET实现邮件发送功能的方法详解》有大致对这个Lumisoft.NET组件的使用进行了介绍,当然Lum...

我在另一篇文章《深入Lumisoft.NET实现邮件发送功能的方法详解》有大致对这个Lumisoft.NET组件的使用进行了介绍,当然Lumisoft.NET组件除了提供邮件发送功能外,还提供了邮件接收等功能的处理(包括基于POP3协议和IMAP协议),而.NET则除了提供SMTP协议功能外,则没有提供POP3协议处理的相关类库,因此收取邮件这需要自己进行封装(需要也可以参考codeproject.com上的相关文章)。

1、.NET的邮件发送功能实现

.NET本身封装了一个SmtpClient类以及相关的邮件对象类,这样利用这些类库,也可以方便实现邮件的发送功能的了。

如添加发送人地址,抄送地址,以及暗送地址(多个地址用逗号分开)代码如下。

复制代码 代码如下:

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的附件和嵌入式资源由对象Attachment和LinkedResource进行管理,他们的利用代码如下所示:

复制代码 代码如下:

//附件

foreach (string fileName in mailInfo.Attachments)

{

mail.Attachments.Add(new Attachment(fileName));

}

//嵌入资源

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);

发送邮件的其他部分代码如下所示

复制代码 代码如下:

mail.IsBodyHtml = mailInfo.IsBodyHtml;

mail.BodyEncoding = Encoding.UTF8;

mail.Subject = mailInfo.Subject;

mail.SubjectEncoding = Encoding.UTF8;

//发送账户设置信息

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发送邮件操作的完整代码如下:

复制代码 代码如下:

/// <summary>

/// 发送外部邮件(系统配置,系统邮件)

/// </summary>

/// <param name="mailInfo">发送邮件信息</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>

/// 通用发送邮件操作

/// </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));

}

//嵌入资源

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);

mail.IsBodyHtml = mailInfo.IsBodyHtml;

mail.BodyEncoding = Encoding.UTF8;

mail.Subject = mailInfo.Subject;

mail.SubjectEncoding = Encoding.UTF8;

//发送账户设置信息

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;

}

string message = string.Format("发送给【{0}】的邮件“{1}”,{2},时间:{3}",

mailInfo.ToEmail[0], mailInfo.Subject, success ? "发送成功" : "发送失败", DateTime.Now);

LogTextHelper.Info(message);

return success;

}

2、基于Lumisoft.NET组件的邮件发送功能实现

基于Lumisoft.NET组件的邮件发送,也是一种很常用的,因为这个开源组件非常强大,经常可以在一些程序中被使用。

这个发送邮件的功能主要是利用SMTP_Client类来实现的,如下代码所示。注意其中的Authenticate函数已经被舍弃,可以使用Auth方法进行验证。但是函数参数有所不同,根据验证对象,使用不同的验证方式,一般选择AUTH_SASL_Client_Plain对象即可。

复制代码 代码如下:

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类型的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;

}

构造用于SMTP发送的数据,可以使用Mail_Message 对象,也可以使用Mime对象,虽然读都可以实现发送功能,不过Mime对象是舍弃的对象了。

构造Mail_Message对象后,创建用于发送的格式要转换为Stream对象。转换为发送的Stream操作如下所示。

复制代码 代码如下:

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;

}

构造Mail_Message格式的邮件操作如下所示。

复制代码 代码如下:

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));

}

//设置回执通知

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;

//普通文本邮件内容,如果对方的收件客户端不支持HTML,这是必需的

string plainTextBody = "如果你邮件客户端不支持HTML格式,或者你切换到“普通文本”视图,将看到此内容";

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>这是一份测试邮件,<img src="cid:test.jpg">来自<font color=red><b>LumiSoft.Net</b></font></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;

}

而构造Mime格式的操作如下所示。

复制代码 代码如下:

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;

//设置回执通知

if (!string.IsNullOrEmpty(notifyEmail) && ValidateUtil.IsEmail(notifyEmail))

{

mainEntity.DSN = notifyEmail;

}

//设置统一回复地址

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);

}

//嵌入图片

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;

}

综合以上两者的发送功能,都可以实现邮件的发送操作,如下界面是发送邮件界面。

3、LumiSoft.NET存储eml邮件文件以及发送eml文件操作

除了上面的发送普通邮件,Lumisoft还支持吧邮件序列号存储到文件(.eml邮件文件)里面,然后也可以通过把文件读取到流里面,进行发送,对于某种场合,可以把邮件存储到eml文件是一个很好的操作。

存储EML文件的相关操作如下所示。

复制代码 代码如下:

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 = "测试邮件";

string body = "<html>这是一份测试邮件,来自<font color=red><b>LumiSoft.Net</b></font></html>";

string bodyEmbedy = "<html>这是一份测试邮件<img src="cid:test.jpg">,来自<font color=red><b>LumiSoft.Net</b></font></html>";

Dictionary<string, string> embedList = new Dictionary<string, string>();

embedList.Add("test.jpg", "C:test.jpg");

//存储为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");

}

发送EML文件操作如下所示。

复制代码 代码如下:

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");

}

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