使用c#給outlook新增工作、發送郵件

    c#在使用outlook提供的一些API時，需要將outlook相關的com引用到項目中。 具體方法就是用vs開啟工程後，在工程上添加引用，在com選項卡上，選擇Microsoft Outlook 12.0 Object Library,如果安裝的不是outlook2007，則對應com的版本不一樣。注意下面描述的方法是在命令列模式或者winform模式下的，不是web模式下的。 在web模式下使用的方法稍有不同，不在此處討論。 

    給outlook新增工作，代碼如下：
        /// <summary>
        /// 給outlook添加一個新的任務
        /// </summary>
        /// <param name="subject">新任務標題</param>
        /// <param name="body">新任務本文</param>
        /// <param name="dueDate">新任務到期時間</param>
        /// <param name="importance">新任務優先順序</param>
        public static void AddNewTask(string subject, string body, DateTime dueDate, OlImportance importance)
        {
            try
            {
                Application outLookApp = new Application();
                TaskItem newTask = (TaskItem)outLookApp.CreateItem(OlItemType.olTaskItem);
                newTask.Body = body;
                newTask.Subject = subject;
                newTask.Importance = importance;
                newTask.DueDate = dueDate;
                newTask.Save();
            }
            catch(System.Exception e)
            {
                throw e;
            }
        }
最簡單的發送郵件
    下面是一個最簡單的發送郵件的例子，在該例子中，只能給一個郵箱地址發郵件，而且還不能夠添加附件。代碼如下：

        /// <summary>
        /// 一個最簡單的發送郵件的例子。同步方式。只支援發送到一個地址，而且沒有附件。
        /// </summary>
        /// <param name="server">smtp伺服器位址</param>
        /// <param name="from">寄件者郵箱</param>
        /// <param name="to">接收者郵箱</param>
        /// <param name="subject">主題</param>
        /// <param name="body">本文</param>
        /// <param name="isHtml">本文是否以html形式展現</param>
        public static void SimpleSeedMail(string server, string from, string to, string subject, string body, bool isHtml)
        {
            try
            {
                MailMessage message = new MailMessage(from, to, subject, body);
                message.IsBodyHtml = isHtml;
                SmtpClient client = new SmtpClient(server);
                client.Credentials = new NetworkCredential("寄件者信箱使用者名（即@前面的東東）","寄件者郵箱密碼");
                client.Send(message);
            }
            catch (System.Exception e)
            {
                throw e;
            }
        }
向多人發郵件，並支援發送多個附件
    代碼如下：

        /// <summary>
        /// 支援向多人發郵件，並支援多個附件的一個發送郵件的例子。
        /// </summary>
        /// <param name="server">smtp伺服器位址</param>
        /// <param name="from">寄件者郵箱</param>
        /// <param name="to">接收者郵箱，多個接收者以;隔開</param>
        /// <param name="subject">郵件主題</param>
        /// <param name="body">郵件內文</param>
        /// <param name="mailAttach">附件</param>
        /// <param name="isHtml">郵件內文是否需要以html的方式展現</param>
        public static void MultiSendEmail(string server, string from, string to, string subject, string body, ArrayList mailAttach, bool isHtml)
        {
            MailMessage eMail = new MailMessage();
            SmtpClient eClient = new SmtpClient(server);
            eClient.Credentials = new NetworkCredential("寄件者信箱使用者名（即@前面的東東）", "寄件者郵箱密碼");

            eMail.Subject = subject;
            eMail.SubjectEncoding = Encoding.UTF8;

            eMail.Body = body;
            eMail.BodyEncoding = Encoding.UTF8;

            eMail.From = new MailAddress(from);

            string[] arrMailAddr;

            try
            {
                #region 添加多個收件者
                eMail.To.Clear();
                if (!string.IsNullOrEmpty(to))
                {
                    arrMailAddr = to.Split(';');
                    foreach (string strTo in arrMailAddr)
                    {
                        if (!string.IsNullOrEmpty(strTo))
                        {
                            eMail.To.Add(strTo);
                        }
                    }
                }
                #endregion
                #region 添加多個附件
                eMail.Attachments.Clear();
                if (mailAttach != null)
                {
                    for (int i = 0; i < mailAttach.Count; i++)
                    {
                        if (!string.IsNullOrEmpty(mailAttach[i].ToString()))
                        {
                            eMail.Attachments.Add(new System.Net.Mail.Attachment(mailAttach[i].ToString()));
                        }
                    }
                }
                #endregion
                #region 發送郵件
                eClient.Send(eMail);
                #endregion
            }
            catch (System.Exception e)
            {
                throw e;
            }

        }//end of method
非同步發送郵件的一個例子。以163的smtp伺服器為例。
    代碼如下：

using System;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
using System.Threading;
using System.ComponentModel;
namespace Examples.SmptExamples.Async
{
    public class SimpleAsynchronousExample
    {
        static bool mailSent = false;

        private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
        {
            // Get the unique identifier for this asynchronous operation.
            String token = (string)e.UserState;

            if (e.Cancelled)
            {
                Console.WriteLine("[{0}] Send canceled.", token);
            }
            if (e.Error != null)
            {
                Console.WriteLine("[{0}] {1}", token, e.Error.ToString());
            }
            else
            {
                Console.WriteLine("Message sent.");
            }
            mailSent = true;
        }
      
        public static void Main(string[] args)
        {
            SmtpClient client = new SmtpClient("smtp.163.com");
            client.Credentials = client.Credentials = new NetworkCredential("寄件者信箱使用者名", "寄件者郵箱密碼");

            MailAddress from = new MailAddress("softwarezxj@163.com");
            MailAddress to = new MailAddress("lastBeachhead@gmail.com");
            MailMessage message = new MailMessage(from, to);
            message.Body = "這是一封測試非同步發送郵件的郵件 ";
            message.BodyEncoding = System.Text.Encoding.UTF8;
            message.Subject = "測試非同步發郵件";
            message.SubjectEncoding = System.Text.Encoding.UTF8;
           
            // 設定回呼函數
            client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
            // SendAsync方法的第二個參數可以是任何對象，這裡使用一個字串標識本次發送
            //傳入的該對象可以在郵件發送結束觸發的回呼函數中訪問到。
            string userState = "test message1";
            client.SendAsync(message, userState);
            Console.WriteLine("Sending message... press c to cancel mail. Press any other key to exit.");
            string answer = Console.ReadLine();
           
            if (answer.StartsWith("c") && mailSent == false)
            {
                client.SendAsyncCancel();
            }
            //清理工作
            message.Dispose();
            Console.WriteLine("Goodbye.");
            Console.ReadLine();
        }
    }
}