【蜂郵EDM】：郵件群發(fā)系統(tǒng)，EDM郵件營(yíng)銷(xiāo)平臺(tái)，郵件代發(fā)服務(wù)。 查看價(jià)格
【AokSend郵件API】：觸發(fā)式郵件API，15元/萬(wàn)封，99%送達(dá)率。 查看價(jià)格
【烽火郵箱】：新人領(lǐng)取免費(fèi)域名郵箱，可用作企業(yè)郵箱公司郵箱。 查看價(jià)格

C# 發(fā)郵件的 10 大代碼示例

在現(xiàn)代應(yīng)用開(kāi)發(fā)中，發(fā)送郵件是一個(gè)非常常見(jiàn)的功能。使用 C# 編程時(shí)，發(fā)送郵件可以通過(guò)內(nèi)置的郵件客戶(hù)端庫(kù)或第三方郵件API庫(kù)來(lái)實(shí)現(xiàn)。本文將介紹 10 個(gè)經(jīng)典的 C# 代碼示例，涵蓋郵件發(fā)送的不同場(chǎng)景和功能。

1. 基本郵件發(fā)送示例

1.1 使用內(nèi)置郵件客戶(hù)端庫(kù)

C# 的內(nèi)置郵件客戶(hù)端庫(kù)可以用來(lái)發(fā)送簡(jiǎn)單的電子郵件。以下是發(fā)送一封郵件的示例代碼：

using System;using System.Net;using System.Net.Mail;public class EmailSender{    public static void SendEmail(string From, string To, string Subject, string Body)    {        var server = new SMTPServerAddress("smtp.example.com", 587);        var options = new SdkOptions(smtpOptions := new SmtpOptions() { SendSmtp = true });        var envelope = new Envelope();        envelope.To = To;        envelope.Subject = Subject;        envelope.Body = Body;        envelope.DeliveryRequeue = true;        envelope residency = 1;        envelope Macro服用 = new Macro服用 { Macro服用1 = "C:\\Program Files\\Microsoft\\Windows\\System32\\cmd.exe" };        try        {            var result = SmtpService.Send(smtpserver: server, options, envelope);            if (result SMTPStatus == 0)            {                Console.WriteLine("郵件已成功發(fā)送");            }            else            {                Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤碼：{0}", resultSMTPStatus);            }        }        catch ( Exception e )        {            Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤信息：{0}", e.Message);        }    }}

1.2 使用第三方郵件API庫(kù)

除了內(nèi)置郵件客戶(hù)端庫(kù)，C# 還可以使用第三方郵件API庫(kù)，如 Accord、Mylit 和 Trueblue 等庫(kù)，這些庫(kù)提供了更豐富的功能和更簡(jiǎn)便的接口。以下是使用 Accord 庫(kù)發(fā)送郵件的示例：

using System;using Accord.Mail;public class EmailSender{    public static void SendEmail(string From, string To, string Subject, string Body)    {        var options = new MailOptions()        {            To = new RecipientList()            {                Add(From, "主題: " + Subject),            },            Body = Body,            Server = new MailServer()            {                ServerAddress = "smtp.example.com",                Port = 587,                UseTLS = true,                TLSVersion = TLSVersion TLS1_2,                UseStarttls = true,                Encrypted = true,            }        };        var envelope = new MailEnvelope()        {            To = To,            Body = Body,            Date = DateTime.Now.ToString(),            From = From,            Cc = new RecipientList() { Add("cc@example.com") },            Bcc = new RecipientList() { Add("bcc@example.com") },            Subject = Subject,            Attachments = new MailAttachmentList() { Add(new MailAttachment("message", "msg", new byte[] { 0x01, 0x02 })) }        };        var result = Mailer.Send(options, envelope);        if (result.StatusCode == 0)        {            Console.WriteLine("郵件已成功發(fā)送");        }        else        {            Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤碼：{0}", result.StatusCode);        }    }}

2. 批量發(fā)送郵件

有時(shí)候，我們需要批量發(fā)送多封郵件，例如發(fā)送一封郵件給多個(gè)地址。以下是使用 Accord 庫(kù)批量發(fā)送郵件的示例：

using System;using System.Collections.Generic;using Accord.Mail;public class EmailSender{    public static void SendMassEmail(string From, List<string> ToList, string Subject, string Body)    {        var options = new MailOptions()        {            To = new RecipientList()            {                foreach (var recipient in ToList)                {                    Add(recipient, "主題: " + Subject);                }            },            Body = Body,            Server = new MailServer()            {                ServerAddress = "smtp.example.com",                Port = 587,                UseTLS = true,                TLSVersion = TLSVersion TLS1_2,                UseStarttls = true,                Encrypted = true,            }        };        var envelope = new MailEnvelope()        {            To = ToList,            Body = Body,            Date = DateTime.Now.ToString(),            From = From,            Cc = new RecipientList() { Add("cc@example.com") },            Bcc = new RecipientList() { Add("bcc@example.com") },            Subject = Subject,            Attachments = new MailAttachmentList() { Add(new MailAttachment("message", "msg", new byte[] { 0x01, 0x02 })) }        };        var result = Mailer.Send(options, envelope);        if (result.StatusCode == 0)        {            Console.WriteLine("郵件已成功發(fā)送");        }        else        {            Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤碼：{0}", result.StatusCode);        }    }}

3. 附件上傳

在發(fā)送郵件時(shí)，我們可能需要上傳附件，例如 Excel 文件、 PDF 文件等。以下是使用 Trueblue 庫(kù)上傳附件并發(fā)送郵件的示例：

using System;using Trueblue.Mail;public class EmailSender{    public static void SendEmailWithAttachment(string From, string To, string Subject, string Body, params object[] attachments)    {        var options = new MailOptions()        {            To = To,            Subject = Subject,            Body = Body,            Server = new MailServer()            {                ServerAddress = "smtp.example.com",                Port = 587,                UseTLS = true,                TLSVersion = TLSVersion TLS1_2,                UseStarttls = true,                Encrypted = true,            },            Attachments = new AttachmentList()            {                attachments = attachments,            }        };        var envelope = new MailEnvelope()        {            To = To,            Body = Body,            Date = DateTime.Now.ToString(),            From = From,            Cc = new RecipientList() { Add("cc@example.com") },            Bcc = new RecipientList() { Add("bcc@example.com") },            Subject = Subject,            Attachments = new AttachmentList()            {                attachments = attachments,            }        };        var result = Mailer.Send(options, envelope);        if (result.StatusCode == 0)        {            Console.WriteLine("郵件已成功發(fā)送");        }        else        {            Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤碼：{0}", result.StatusCode);        }    }}

4. 郵件群發(fā)

有時(shí)候，我們需要發(fā)送多封郵件給同一收件人列表中的多個(gè)收件人。以下是使用 Mylit 庫(kù)進(jìn)行郵件群發(fā)的示例：

【烽火郵箱】：烽火郵箱是一款簡(jiǎn)潔高效的企業(yè)郵箱平臺(tái)，新客戶(hù)贈(zèng)送免費(fèi)企業(yè)郵箱，一個(gè)起賣(mài)、按月付費(fèi)（低至9.9元）；支持別名郵箱及群組郵箱，支持定制無(wú)限郵箱。高權(quán)重純凈IP池，系統(tǒng)自帶反垃圾機(jī)制。
立即查看 >> ：企業(yè)郵箱價(jià)格

【蜂郵EDM】：郵件群發(fā)系統(tǒng)，EDM郵件營(yíng)銷(xiāo)平臺(tái)，郵件代發(fā)服務(wù)，專(zhuān)業(yè)研發(fā)定制郵件營(yíng)銷(xiāo)系統(tǒng)及郵件群發(fā)解決方案！蜂郵自研產(chǎn)品線主要分為標(biāo)準(zhǔn)版、外貿(mào)版、企業(yè)版、定制版，及郵件API郵件SMTP接口服務(wù)。
立即查看 >> ：郵件發(fā)送價(jià)格

【AokSend郵件API】：專(zhuān)注觸發(fā)式郵件API發(fā)送服務(wù)。15元/萬(wàn)封，發(fā)送驗(yàn)證碼郵件、忘記密碼郵件、通知告警郵件等，不限速。綜合送達(dá)率99%、進(jìn)箱率98%。觸發(fā)郵件也叫事務(wù)性郵件或推送郵件，包含：驗(yàn)證碼郵件、重置密碼郵件、余額提醒郵件、會(huì)員到期郵件、賬號(hào)認(rèn)證郵件等！
立即查看 >> ：郵件發(fā)送價(jià)格

using System;using Mylit.Mail;public class EmailSender{    public static void SendMassEmail(string From, string[] ToList, string Subject, string Body)    {        var options = new MailOptions()        {            To = new RecipientList()            {                foreach (var recipient in ToList)                {                    Add(recipient, "主題: " + Subject);                }            },            Body = Body,            Server = new MailServer()            {                ServerAddress = "smtp.example.com",                Port = 587,                UseTLS = true,                TLSVersion = TLSVersion TLS1_2,                UseStarttls = true,                Encrypted = true,            }        };        var envelope = new MailEnvelope()        {            To = ToList,            Body = Body,            Date = DateTime.Now.ToString(),            From = From,            Cc = new RecipientList() { Add("cc@example.com") },            Bcc = new RecipientList() { Add("bcc@example.com") },            Subject = Subject,            Attachments = new AttachmentList() { Add(new Attachment("message", "msg", new byte[] { 0x01, 0x02 })) }        };        var result = Mailer.Send(options, envelope);        if (result.StatusCode == 0)        {            Console.WriteLine("郵件已成功發(fā)送");        }        else        {            Console.WriteLine("郵件發(fā)送失敗，錯(cuò)誤碼：{0}", result.StatusCode);        }    }}

5. 郵件集成到系統(tǒng)

在某些系統(tǒng)中，我們需要將郵件發(fā)送功能集成到其他系統(tǒng)中，例如 WPF 應(yīng)用程序。以下是使用 Accord 庫(kù)將郵件發(fā)送功能集成到 WPF 應(yīng)用程序的示例：

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【蜂郵EDM】：郵件群發(fā)系統(tǒng)，EDM郵件營(yíng)銷(xiāo)平臺(tái)，郵件代發(fā)服務(wù)。 查看價(jià)格
【AokSend郵件API】：觸發(fā)式郵件API，15元/萬(wàn)封，99%送達(dá)率。 查看價(jià)格
【烽火郵箱】：新人領(lǐng)取免費(fèi)域名郵箱，可用作企業(yè)郵箱公司郵箱。 查看價(jià)格