在C＃中阅读Gmail中的电子邮件

我正在尝试阅读Gmail中的电子邮件。 我已经尝试了我能找到的每个API /开源项目，并且不能让它们中的任何一个工作。

有没有人有一个工作代码示例，可以让我从Gmail帐户validation和下载电子邮件？

最终工作版本发布如下： https ： //stackoverflow.com/a/19570553/550198

Answer 1

使用以下库： https ： //github.com/pmengal/MailSystem.NET

这是我的完整代码示例：

电子邮件存储库

using System.Collections.Generic; using System.Linq; using ActiveUp.Net.Mail; namespace GmailReadImapEmail { public class MailRepository { private Imap4Client client; public MailRepository(string mailServer, int port, bool ssl, string login, string password) { if (ssl) Client.ConnectSsl(mailServer, port); else Client.Connect(mailServer, port); Client.Login(login, password); } public IEnumerable GetAllMails(string mailBox) { return GetMails(mailBox, "ALL").Cast(); } public IEnumerable GetUnreadMails(string mailBox) { return GetMails(mailBox, "UNSEEN").Cast(); } protected Imap4Client Client { get { return client ?? (client = new Imap4Client()); } } private MessageCollection GetMails(string mailBox, string searchPhrase) { Mailbox mails = Client.SelectMailbox(mailBox); MessageCollection messages = mails.SearchParse(searchPhrase); return messages; } } } 

用法

 [TestMethod] public void ReadImap() { var mailRepository = new MailRepository( "imap.gmail.com", 993, true, "[e-mail]", "yourPassword" ); var emailList = mailRepository.GetAllMails("inbox"); foreach (Message email in emailList) { Console.WriteLine("
{0}: {1}
{2}
", email.From, email.Subject, email.BodyHtml.Text); if (email.Attachments.Count > 0) { foreach (MimePart attachment in email.Attachments) { Console.WriteLine("
Attachment: {0} {1}
", attachment.ContentName, attachment.ContentType.MimeType); } } } } 

---

另一个例子，这次使用MailKit

 public class MailRepository : IMailRepository { private readonly string mailServer, login, password; private readonly int port; private readonly bool ssl; public MailRepository(string mailServer, int port, bool ssl, string login, string password) { this.mailServer = mailServer; this.port = port; this.ssl = ssl; this.login = login; this.password = password; } public IEnumerable GetUnreadMails() { var messages = new List(); using (var client = new ImapClient()) { client.Connect(mailServer, port, ssl); // Note: since we don't have an OAuth2 token, disable // the XOAUTH2 authentication mechanism. client.AuthenticationMechanisms.Remove("XOAUTH2"); client.Authenticate(login, password); // The Inbox folder is always available on all IMAP servers... var inbox = client.Inbox; inbox.Open(FolderAccess.ReadOnly); var results = inbox.Search(SearchOptions.All, SearchQuery.Not(SearchQuery.Seen)); foreach (var uniqueId in results.UniqueIds) { var message = inbox.GetMessage(uniqueId); messages.Add(message.HtmlBody); //Mark message as read //inbox.AddFlags(uniqueId, MessageFlags.Seen, true); } client.Disconnect(true); } return messages; } public IEnumerable GetAllMails() { var messages = new List(); using (var client = new ImapClient()) { client.Connect(mailServer, port, ssl); // Note: since we don't have an OAuth2 token, disable // the XOAUTH2 authentication mechanism. client.AuthenticationMechanisms.Remove("XOAUTH2"); client.Authenticate(login, password); // The Inbox folder is always available on all IMAP servers... var inbox = client.Inbox; inbox.Open(FolderAccess.ReadOnly); var results = inbox.Search(SearchOptions.All, SearchQuery.NotSeen); foreach (var uniqueId in results.UniqueIds) { var message = inbox.GetMessage(uniqueId); messages.Add(message.HtmlBody); //Mark message as read //inbox.AddFlags(uniqueId, MessageFlags.Seen, true); } client.Disconnect(true); } return messages; } } 

用法

 [Test] public void GetAllEmails() { var mailRepository = new MailRepository("imap.gmail.com", 993, true, "[e-mail]", "YOURPASSWORDHERE"); var allEmails = mailRepository.GetAllMails(); foreach(var email in allEmails) { Console.WriteLine(email); } Assert.IsTrue(allEmails.ToList().Any()); } 

Answer 2

您不需要任何额外的第三方库 。 您可以阅读Gmail在此处提供的API中的数据： https ： //mail.google.com/mail/feed/atom

XML格式的响应可以通过以下代码处理：

 try { System.Net.WebClient objClient = new System.Net.WebClient(); string response; string title; string summary; //Creating a new xml document XmlDocument doc = new XmlDocument(); //Logging in Gmail server to get data objClient.Credentials = new System.Net.NetworkCredential("Email", "Password"); //reading data and converting to string response = Encoding.UTF8.GetString( objClient.DownloadData(@"https://mail.google.com/mail/feed/atom")); response = response.Replace( @"", @""); //loading into an XML so we can get information easily doc.LoadXml(response); //nr of emails nr = doc.SelectSingleNode(@"/feed/fullcount").InnerText; //Reading the title and the summary for every email foreach (XmlNode node in doc.SelectNodes(@"/feed/entry")) { title = node.SelectSingleNode("title").InnerText; summary = node.SelectSingleNode("summary").InnerText; } } catch (Exception exe) { MessageBox.Show("Check your network connection"); } 

Answer 3

您是否尝试过具有完整MIME支持的 POP3 电子邮件客户端 ？

如果你不这样做，那对你来说就是一个很好的例子。 作为一个替代者;

OpenPop.NET

C＃中的.NET类库，用于与POP3服务器通信。 易于使用但function强大。 包含由数百个测试用例支持的强大的MIME解析器。 有关更多信息，请访问我们的项目主页。

Lumisoft

Answer 4

您还可以尝试Mail.dll IMAP客户端 。

它支持所有Gmail IMAP协议扩展 ：

• 线程ID，
• 消息ID，
• 标签，
• 本地化文件夹名称，
• 谷歌搜索语法
• OAuth身份validation。

请注意，Mail.dll是我开发的商业产品。