上篇文章中介绍了通过Exchange Web Service来读取用户邮件或任务信息，大家可以看到需要写的代码很多且也比较复杂。接下介绍读取Exchange邮件或任务的第二种方法---通过Exchange Web Service Managed API 1.1.
Exchange Web Service Managed API:是微软提供的通过Exchange Web Service开发客户端应用程序来快速读取Exchange邮件、任务、发送邮件、删除邮件等的管理接口。
使用API的好处：
1、不用需要引用Exchange Web Service
2、代码量大大减少，提高开发效率
3、提高性能且更简单容易的对Exchange进行管理和操作
下载地址：
通过API来读取Exchange的邮件或任务的实现过程，如下：
1、引用如下命名空间：
using Microsoft.Exchange.WebServices.Data;
using System.Net;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
2、实现代码
/// <summary> /// 读取所有Exchange对象数目，不使用模拟功能 /// </summary> /// <param name="serverName">服务器名称</param> /// <param name="useAutodiscover">是否自动发现服务器URL</param> public void EWSImpersonations(string serverName, bool useAutodiscover) { try { //Call SSL Web service must added!!! ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);//如果是Exchange 2010，则切换到2010 //建立信任连接 //ICredentials creds = CredentialCache.DefaultNetworkCredentials; ICredentials creds = new NetworkCredential("username", "password", "domain"); service.Credentials = new WebCredentials(creds); if (!useAutodiscover) { string[] servers = serverName.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); for (int i = 0; i < servers.Length; i++) { try { service.Url = new Uri("https://" + servers[i] + "/ews/exchange.asmx"); break; } catch { } } } service.PreAuthenticate = true; //创建读取信息视图 ItemView view = new ItemView(10); view.OrderBy.Add(ItemSchema.DateTimeReceived, Microsoft.Exchange.WebServices.Data.SortDirection.Descending); #region ReadEmail Folder inbox = Folder.Bind(service, WellKnownFolderName.Inbox);//Inbox文件夹，不包括子文件夹 int unread = inbox.UnreadCount; Microsoft.Exchange.WebServices.Data.EmailMessage em = null; FindItemsResults<Item> findMailResults = service.FindItems(WellKnownFolderName.Inbox, view); Response.Write("<br>unread mail subject: <br><br>"); foreach (Item m in findMailResults) { em = (Microsoft.Exchange.WebServices.Data.EmailMessage)m; if (!em.IsRead) { Response.Write(em.Subject + string.Format(" 发件人: {0} <br>", em.From.Name.ToString())); } } //find all child folders mail message FindInboxChildFolders(service, view, serverName, ref unread); Response.Write("unread mail : " + unread.ToString() + "<br>"); #endregion Response.Write("=================================================="); #region ReadTask int newTasks = 0;//unread task number FindItemsResults<Item> findResults = service.FindItems(WellKnownFolderName.Tasks,view); //读取任务文件夹，不包括子文件夹 Microsoft.Exchange.WebServices.Data.Task t = null; Response.Write("<br>unread task subject:<br>"); foreach (Item item in findResults.Items) { t = (Microsoft.Exchange.WebServices.Data.Task)(item); if (!t.IsComplete) { newTasks++; Response.Write(t.Subject); Response.Write("<br>status :" + t.Status); } } //Find all task child folder FindTaskChildFolders(service, view, serverName, ref newTasks); Response.Write("<br><br> unread task :" + newTasks.ToString()); #endregion } catch (Exception ex) { Response.Write(errorMessage); } } /// <summary> /// Find all child folder mail message /// </summary> /// <param name="service"></param> /// <param name="view"></param> /// <param name="serverName"></param> /// <param name="unread"></param> private void FindInboxChildFolders(ExchangeService service, ItemView view, string serverName, ref int unread) { try { FindFoldersResults findResults = service.FindFolders(WellKnownFolderName.Inbox,new FolderView(int.MaxValue)); Microsoft.Exchange.WebServices.Data.EmailMessage em = null; foreach (Folder folder in findResults.Folders) { FindItemsResults<Item> findMailResults = folder.FindItems(view); unread += folder.UnreadCount; foreach (Item m in findMailResults) { em = (Microsoft.Exchange.WebServices.Data.EmailMessage)m; if (!em.IsRead) { Response.Write(em.Subject + string.Format(" 发件人: {0} <br>", em.From.Name.ToString())); } } } } catch { } } /// <summary> /// Find all task child folder /// </summary> /// <param name="service"></param> /// <param name="view"></param> /// <param name="serverName"></param> /// <param name="newTasks"></param> private void FindTaskChildFolders(ExchangeService service, ItemView view, string serverName, ref int newTasks) { try { FindFoldersResults findResults = service.FindFolders(WellKnownFolderName.Tasks,new FolderView(int.MaxValue)); Microsoft.Exchange.WebServices.Data.Task t = null; foreach (Folder folder in findResults.Folders) { FindItemsResults<Item> findTaskResults = folder.FindItems(view); foreach (Item task in findTaskResults) { t = (Microsoft.Exchange.WebServices.Data.Task)(task); if (!t.IsComplete) { newTasks++; Response.Write( t.Subject ); Response.Write("<br>status :" + t.Status); } } } } catch (Exception) { } } #endregion /// <summary> /// 忽略SSL证书请求 /// </summary> /// <param name="sender"></param> /// <param name="certificate"></param> /// <param name="chain"></param> /// <param name="errors"></param> /// <returns></returns> public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; }