摘要： 最近项目中需要用到exchange的操作，就参照msdn弄了一个简单的操作类。目前先实现了，发送邮件和拉取收件箱的功能，其他的以后在慢慢的添加。 using Microsoft.Exchange.

using Microsoft.Exchange.WebServices.Data;using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Text;using System.Threading.Tasks;

namespace WebSite.Utilities.Mail

{

    /// <summary>

    /// exchange邮件客户端类

    /// </summary>

    public class ExChangeMailClient

    {

        /// <summary>

        /// exchange服务对象

        /// </summary>

        private static ExchangeService _exchangeService = new ExchangeService(ExchangeVersion.Exchange2010_SP1);

        /// <summary>

        /// 获取收件箱

        /// </summary>

        /// <param name="userId">当前用户名</param>

        /// <param name="pwd">密码</param>

        /// <param name="domain">域</param>

        /// <param name="pageSize">一次加载的数量</param>

        /// <param name="offset">偏移量</param>

        /// <returns></returns>

        public static List<Email> GetInbox(string userId, string pwd, string domain, int pageSize, int offset)

        {

            try

            {

                if (string.IsNullOrEmpty(userId) || string.IsNullOrEmpty(pwd) || string.IsNullOrEmpty(domain))

                {

                    throw new ArgumentNullException("当前用户信息为空，无法访问exchange服务器");

                }

                List<Email> lstEmails = new List<Email>();

                _exchangeService.Credentials = new NetworkCredential(userId, pwd, domain);

                _exchangeService.Url = new Uri(WebConfig.ExchangeServerUrl);

                ItemView view = new ItemView(pageSize, offset);

                FindItemsResults<Item> findResults = _exchangeService.FindItems(WellKnownFolderName.Inbox, SetFilter(), view);

                foreach (Item item in findResults.Items)

                {

                    item.Load(PropertySet.FirstClassProperties);

                    lstEmails.Add(new Email()

                    {

                        ExchangeItemId = item.Id.ChangeKey,

                        body = item.Body.Text,

                        Mail_cc = item.DisplayCc,

                        Mail_from = item.LastModifiedName,

                        IsRead = item.IsNew,

                        Subject = item.Subject,

                        CreateOn = item.DateTimeCreated

                    });

                }

                return lstEmails;

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

        /// <summary>

        /// 根据用户邮件地址返回用户的未读邮件数

        /// </summary>

        /// <param name="user"></param>

        /// <returns></returns>

        public static int GetUnReadMailCountByUserMailAddress(string userId, string pwd, string domain, string email)

        {

            int unRead = 0;

            try

            {

                _exchangeService.Credentials = new NetworkCredential(userId, pwd, domain);

                _exchangeService.Url = new Uri(WebConfig.ExchangeServerUrl);

                _exchangeService.ImpersonatedUserId = new Microsoft.Exchange.WebServices.Data.ImpersonatedUserId(Microsoft.Exchange.WebServices.Data.ConnectingIdType.SmtpAddress, email);

                unRead = Microsoft.Exchange.WebServices.Data.Folder.Bind(_exchangeService, Microsoft.Exchange.WebServices.Data.WellKnownFolderName.Inbox).UnreadCount;

            }

            catch (Exception ex)

            {

                throw ex;

            }

            return unRead;

        }

        /// <summary>

        /// 过滤器

        /// </summary>

        /// <returns></returns>

        private static SearchFilter SetFilter()

        {

            List<SearchFilter> searchFilterCollection = new List<SearchFilter>();

            //searchFilterCollection.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false));

            //searchFilterCollection.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, true));

            //筛选今天的邮件

            SearchFilter start = new SearchFilter.IsGreaterThanOrEqualTo(EmailMessageSchema.DateTimeCreated, Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd 00:00:00")));

            SearchFilter end = new SearchFilter.IsLessThanOrEqualTo(EmailMessageSchema.DateTimeCreated, Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd 23:59:59")));

            searchFilterCollection.Add(start);

            searchFilterCollection.Add(end);

            SearchFilter filter = new SearchFilter.SearchFilterCollection(LogicalOperator.And, searchFilterCollection.ToArray());

            return filter;

        }

        /// <summary>

        /// 发送邮件

        /// </summary>

        /// <param name="email"></param>

        /// <returns></returns>

        public static void SendMail(Email email, string userId, string pwd, string domain)

        {

            try

            {

                _exchangeService.Credentials = new NetworkCredential(userId, pwd, domain);

                _exchangeService.Url = new Uri(WebConfig.ExchangeServerUrl);

                //发送人

                Mailbox mail = new Mailbox(email.Mail_from);

                //邮件内容

                EmailMessage message = new EmailMessage(_exchangeService);

                string[] strTos = email.Mail_to.Split(';');

                //接收人

                foreach (string item in strTos)

                {

                    if (!string.IsNullOrEmpty(item))

                    {

                        message.ToRecipients.Add(item);

                    }

                }

                //抄送人

                foreach (string item in email.Mail_cc.Split(';'))

                {

                    if (!string.IsNullOrEmpty(item))

                    {

                        message.CcRecipients.Add(item);

                    }

                }

                //邮件标题

                message.Subject = email.Subject;

                //邮件内容

                message.Body = new MessageBody(email.body);

                //发送并且保存                message.SendAndSaveCopy();

            }

            catch (Exception ex)

            {

                throw new Exception("发送邮件出错，" + ex.Message + "\r\n" + ex.StackTrace);

            }

        }

    }

}

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