EWS：郵箱的一個開放的介面服務

https://3gstudent.github.io/3gstudent.github.io/Exchange-Web-Service(EWS)%E5%BC%80%E5%8F%91%E6%8C%87%E5%8D%97/

EWS是郵箱的一個開放的介面服務，可以取到郵箱的各種信息，郵件收發、會議、日期安排

首先需要引入 Microsoft.Exchange.WebServices.dll 引用

   class Program
    {
        /// <summary>
        /// exchange服務對象    
        /// </summary>
        //private static ExchangeService _exchangeService = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
        static void Main(string[] args)
        {
            #region 需要依賴 Microsoft.Exchange.WebServices 讀取未郵件箱
            //ExchangeService版本為2007SP1
            ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
            //參數是用戶名,密碼,域
            service.Credentials = new WebCredentials("email.qq.com", "Zh.123456", "qq.com");
            //給出Exchange Server的URL https://xxxxxxx
            service.Url = new Uri("https://mail.xxxx.com/ews/exchange.asmx");
            //你自己的郵件地址 [email protected] 
            service.AutodiscoverUrl("email.com", RedirectionCallback);
            //創建過濾器, 條件為郵件未讀.
            SearchFilter sf = new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, true);
            //查找Inbox,加入過濾器條件,結果10條
            FindItemsResults<Item> findResults = service.FindItems(WellKnownFolderName.Inbox, sf, new ItemView(10));
            foreach (Item item in findResults.Items)
            {
                EmailMessage email = EmailMessage.Bind(service, item.Id);
                if (!email.IsRead)
                {
                    Console.WriteLine(email.Body);
                    //標記為已讀
                    email.IsRead = true;
                    //將對郵件的改動提交到伺服器
                    email.Update(ConflictResolutionMode.AlwaysOverwrite);
                }
            }
            #endregion
    
            #region 不需要依賴 Microsoft.Exchange.WebServices 郵件發送
            String user = "[email protected]";
            String password = "Zh.123456"; 
            ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => { return true; };
            StreamReader sendData = new StreamReader("ews.xml", Encoding.Default);
            byte[] sendDataByte = Encoding.UTF8.GetBytes(sendData.ReadToEnd());
            sendData.Close();
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://mail.xxxxx.com/ews/exchange.asmx");
                request.Method = "POST";
                request.ContentType = "text/xml";
                request.ContentLength = sendDataByte.Length;
                request.AllowAutoRedirect = false;
                request.Credentials = new NetworkCredential(user, password);
                Stream requestStream = request.GetRequestStream();
                requestStream.Write(sendDataByte, 0, sendDataByte.Length);
                requestStream.Close();

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode != HttpStatusCode.OK)
                {
                    throw new WebException(response.StatusDescription);
                }
                Stream receiveStream = response.GetResponseStream();

                StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);

                String receiveString = readStream.ReadToEnd();
                response.Close();
                readStream.Close();

                StreamWriter receiveData = new StreamWriter("out.xml");
                receiveData.Write(receiveString);
                receiveData.Close();
            }
            catch (WebException e)
            {
                Console.WriteLine("[!]{0}", e.Message);
                Environment.Exit(0);
            }
            Console.WriteLine("[+]Done");

            #endregion
        }
        static bool RedirectionCallback(string url)
        {
            // Return true if the URL is an HTTPS URL.
            return true;
        }

        public static void SendByExChange(string[] toemails, string[] Ctoemails, string title, string body, string[] fileName)
        {
            try
            {
                ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };//至關重要的一句 否則會報錯：The Autodiscover service couldn't be located.
                ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
                service.Credentials = new NetworkCredential("[email protected]", "Zh.123456");
                service.Url = new Uri(@"https://mail.xxxxx.com/ews/exchange.asmx");//exchange伺服器上介面地址
                service.TraceEnabled = false;
                service.AutodiscoverUrl("[email protected]");
                EmailMessage message = new EmailMessage(service);
                message.Subject = title;
                message.Body = body;
                if (fileName != null)
                {
                    foreach (var str in fileName)
                        message.Attachments.AddFileAttachment(str);
                }
                if (Ctoemails != null)
                {
                    foreach (var email in Ctoemails)
                        message.CcRecipients.Add(email);
                }
                if (toemails != null)
                {
                    foreach (var email in toemails)
                        message.ToRecipients.Add(email);
                }

                message.SendAndSaveCopy();
            }
            catch (Exception ex)
            {
                //Utility.LogHelper.WriteLog("發送郵件失敗", ex);
            }
        }
    }