using System;using System.Collections.Concurrent;using System.Collections.Generic;using System.Collections.ObjectModel;using System.ComponentModel;using System.IO;using System.Linq;using System.Net;using System.Net.Mail;using System.Net.Mime;using System.Text;using System.Threading;using System.Web;namespace MailHelpers{ ////// MailHelper 的摘要说明 /// public class MailHelper { #region 构造函数 ////// 构建 MailHelper 实例 /// public MailHelper() { } ////// 构建 MailHelper 实例 /// /// smtp服务器地址 /// 端口 /// 用户名 /// 密码 public MailHelper(string smtpclient = null, int port = 0, string user = null, string password = null) { SmtpClientAdd = smtpclient; Port = port; User = user; Password = password; } ////// 构建 MailHelper 实例 /// /// SmtpClient实例 /// 是否自动释放SmtpClient实例 public MailHelper(SmtpClient mSmtpClient, bool autoReleaseSmtp) { SetSmtpClient(mSmtpClient, autoReleaseSmtp); } #endregion 构造函数 #region 公开属性 private int priority = 0; ////// 设置此电子邮件的密送地址列表,分号(;)分隔。 /// public string Bcc { get; set; } ////// 设置邮件正文。 /// public string Body { get; set; } ////// 设置此电子邮件的抄送地址列表,分号(;)分隔。 /// public string Cc { get; set; } ////// 设置此电子邮件的发信人地址。 /// public string From { get; set; } ////// 设置此电子邮件的发信人地址。 /// public string FromDisplayName { get; set; } ////// 设置邮件正文是否为 Html 格式的值。 /// public bool IsBodyHtml { get; set; } ////// 异步发送标志 /// public bool m_IsAsync { get; set; } ////// 设置此电子邮件的优先级 0-Normal 1-Low 2-High /// 默认Normal。 /// public int Priority { get { return this.priority; } set { if (value < 0 || value > 2) priority = 0; else priority = value; } } ////// 设置此电子邮件的主题。 /// public string Subject { get; set; } ////// 设置此电子邮件的收件地址列表,分号(;)分隔。 /// public string To { get; set; } #endregion 公开属性 #region 内部字段、属性 ////// 默认为false。设置在 MailHelper 类内部,发送完邮件后是否自动释放 SmtpClient 实例 /// Smtp不管是在 MailHelper 内部还是在外部都必须进行主动释放, /// 因为:SmtpClient 没有提供 Finalize() 终结器,所以GC不会进行回收,只能使用完后主动进行释放,否则会发生内存泄露问题。 /// /// 何时将 autoReleaseSmtp 设置为false,就是SmtpClient需要重复使用的情况,即需要使用“相同MailHelper”向“相同Smtp服务器”发送大批量的邮件时。 /// private bool m_autoDisposeSmtp = false; // 指定一个电子邮件不同格式显示的副本。 private CollectionAlternateViews { get; set; } // 附件集合 private Collection Attachments { get; set; } private SmtpClient m_SmtpClient { get; set; } /// /// smtp密码 /// private string Password { get; set; } ////// smtp端口 /// private int Port { get; set; } ////// smtp服务器地址 /// private string SmtpClientAdd { get; set; } ////// smtp用户名 /// private string User { get; set; } #endregion 内部字段、属性 #region 计划邮件数量 和 已执行完成邮件数量 // 记录和获取在大批量执行异步短信发送时已经处理了多少条记录 // 1、根据此值手动或自动释放 SmtpClient .实际上没有需要根据此值进行手动释放,因为完全可以用自动释放替换此逻辑 // 2、根据此值可以自己设置进度 private long m_CompletedSendCount = 0; // 计划邮件数量 private long m_PrepareSendCount = 0; public long CompletedSendCount { get { return Interlocked.Read(ref m_CompletedSendCount); } private set { Interlocked.Exchange(ref m_CompletedSendCount, value); } } public long PrepareSendCount { get { return Interlocked.Read(ref m_PrepareSendCount); } private set { Interlocked.Exchange(ref m_PrepareSendCount, value); } } #endregion 计划邮件数量 和 已执行完成邮件数量 #region 异步 发送邮件相关参数 // 案例:因为异步发送邮件在SmtpClient处必须加锁保证一封一封的发送。 // 这样阻塞了主线程。所以换用队列的方式以无阻塞的方式进行异步发送大批量邮件 private AutoResetEvent m_AutoResetEvent = null; // 因为 MessageQueue 可能在 m_SendMailThread 线程中进行出队操作,所以使用并发队列ConcurrentQueue. // 队列中的数据只能通过取消异步发送进行清空,或则就会每一元素都执行发送邮件 private ConcurrentQueuem_MessageQueue = null; // 待发送队列缓存数量。单独开个计数是为了提高获取此计数的效率 private int m_messageQueueCount = 0; // 发送任务可能很长,所以使用 Thread 而不是用ThreadPool。(避免长时间暂居线程池线程),并且SmtpClient只支持一次一封邮件发送 private Thread m_SendMailThread = null; /// /// 在执行异步发送时传递的对象,用于传递给异步发生完成时调用的方法 OnSendCompleted 。 /// public object AsycUserState { get; set; } private AutoResetEvent AutoResetEvent { get { if (m_AutoResetEvent == null) m_AutoResetEvent = new AutoResetEvent(true); return m_AutoResetEvent; } } private ConcurrentQueueMessageQueue { get { if (m_MessageQueue == null) m_MessageQueue = new ConcurrentQueue (); return m_MessageQueue; } } #endregion 异步 发送邮件相关参数 #region SmtpClient 相关方法 /// /// 根据默认值创建一个链接 /// public SmtpClient CreatSmtpClient() { var smtp = new SmtpClient(SmtpClientAdd, Port); smtp.EnableSsl = false; smtp.UseDefaultCredentials = false; smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.Credentials = new NetworkCredential(User, Password); smtp.Timeout = 100000; return smtp; } ////// 检查此 MailHelper 实例是否已经设置了 SmtpClient /// ///true代表已设置 public bool ExistsSmtpClient() { return m_SmtpClient != null; } ////// 释放 SmtpClient /// public void ManualDisposeSmtp() { this.InnerDisposeSmtp(); } ////// 设置 SmtpClient 实例 和是否自动释放Smtp的唯一入口 /// 1、将内部 计划数量 和 已完成数量 清零,重新统计以便自动释放SmtpClient /// 2、若要对SmtpClent设置SendCompleted事件,请在调用此方法前进行设置 /// /// SmtpClient 实例 /// 设置在 MailHelper 类内部,发送完邮件后是否自动释放 SmtpClient 实例 public void SetSmtpClient(SmtpClient mSmtpClient, bool autoReleaseSmtp) { //#if DEBUG // Debug.WriteLine("设置SmtpClient,自动释放为" + (autoReleaseSmtp ? "TRUE" : "FALSE")); //#endif m_SmtpClient = mSmtpClient; m_autoDisposeSmtp = autoReleaseSmtp; // 将内部 计划数量 和 已完成数量 清零,重新统计以便自动释放SmtpClient (MailHelper实例唯一的清零地方) //m_PrepareSendCount = 0; m_CompletedSendCount = 0; // 注册回调事件.释放对象---该事件不进行取消注册,只在释放SmtpClient时,一起释放 (所以SmtpClient与MailHelper绑定后,就不要再单独使用了) m_SmtpClient.SendCompleted += SendCompleted4Dispose; } ////// 释放SmtpClient /// private void AutoDisposeSmtp() { if (m_autoDisposeSmtp && m_SmtpClient != null) { if (PrepareSendCount == 0) { // PrepareSendCount=0 说明还未设置计划批量邮件数,所以不自动释放SmtpClient。 // 不能因为小于CompletedSendCount就报错,因为可能是先发送再设置计划邮件数量 } else if (PrepareSendCount < CompletedSendCount) { throw new Exception(MailValidatorHelper.EMAIL_ASYNC_SEND_PREPARE_ERROR); } else if (PrepareSendCount == CompletedSendCount) { InnerDisposeSmtp(); } } else { // 不清空和Dispose()内部的SmtpClient字段,即用在需要重复使用时不需要再调用 SetSmtpClient() 进行设置。 } } ////// 释放SmtpClient /// private void InnerDisposeSmtp() { if (m_SmtpClient != null) { //#if DEBUG // Debug.WriteLine("释放SMtpClient"); //#endif m_SmtpClient.Dispose(); m_SmtpClient = null; // 在设置 SmtpClient 入口处重新进行设置 m_autoDisposeSmtp = false; PrepareSendCount = 0; CompletedSendCount = 0; } } #endregion SmtpClient 相关方法 #region 发送邮件 相关方法 ////// 取消异步邮件发送 /// public void SendAsyncCancel() { // 因为此类为非线程安全类,所以 SendAsyncCancel 和发送邮件方法中操作MessageQueue部分的代码肯定是串行化的。 // 所以不存在一边入队,一边出队导致无法完全取消所有邮件发送 // 1、清空队列。 // 2、取消正在异步发送的mail。 // 3、设置计划数量=完成数量 // 4、执行 AutoDisposeSmtp() // 1、清空队列。 MailUserState tempMailUserState = null; while (MessageQueue.TryDequeue(out tempMailUserState)) { Interlocked.Decrement(ref m_messageQueueCount); MailMessage message = tempMailUserState.CurMailMessage; InnerDisposeMessage(message); } tempMailUserState = null; // 2、取消正在异步发送的mail。 m_SmtpClient.SendAsyncCancel(); // 3、设置计划数量=完成数量 PrepareSendCount = CompletedSendCount; // 4、执行 AutoDisposeSmtp() AutoDisposeSmtp(); } ////// 发送一封邮件 /// /// 邮件标题 /// 邮件正文 /// 收件列表(;分隔) /// 抄送列表(;分隔) /// 密送列表(;分隔) public void SendMail(string subject, string body, string to, string cc = null, string bcc = null, string from = null, string fromName = null) { SetMailInfo(subject, body, to, cc, bcc, from, fromName); m_PrepareSendCount = 1; SendMail(); } ////// 发送邮件 /// /// smtp链接,如不设置则自动根据默认值创建一个 /// 是否自动释放smtp链接 public void SendMail(SmtpClient smtpClient = null, bool autoReleaseSmtp = true) { SetSmtpClient(smtpClient ?? CreatSmtpClient(), autoReleaseSmtp); InnerSendMessage(); } ////// 计划批量发送邮件的个数,配合自动释放SmtpClient。(批量邮件发送不调用此方法就不会自动释放SmtpClient) /// 0、此方法可以在发送邮件方法之前或之后调用 /// 1、只有设置后才会自动根据 m_autoDisposeSmtp 字段进行释放SmtpClient。 /// 2、若 m_autoDisposeSmtp = false 即由自己手动进行设置的无需调用此方法设置预计邮件数 /// /// 计划邮件数量 public void SetBatchMailCount(long preCount) { PrepareSendCount = preCount; if (preCount < CompletedSendCount) { throw new ArgumentOutOfRangeException(nameof(preCount), MailValidatorHelper.EMAIL_ASYNC_SEND_PREPARE_ERROR); } if (preCount == CompletedSendCount) { if (m_autoDisposeSmtp) InnerDisposeSmtp(); } } ////// 设置邮件基本信息 /// /// 邮件标题 /// 邮件正文 /// 收件列表(;分隔) /// 抄送列表(;分隔) /// 密送列表(;分隔) /// 邮件内容是否html格式 /// 邮件优先级 0-Normal 1-Low 2-High public void SetMailInfo(string subject, string body, string to, string cc = null, string bcc = null, string from = null, string fromName = null, bool isbodyhtml = true, int priority = 0) { Subject = subject; Body = body; To = to; Cc = cc ?? ""; Bcc = bcc ?? ""; From = from ?? ""; FromDisplayName = fromName ?? ""; IsBodyHtml = isbodyhtml; Priority = priority; } ////// 声明在 SmtpClient.SendAsync() 执行完后释放相关对象的回调方法 最后触发的委托 /// protected void SendCompleted4Dispose(object sender, AsyncCompletedEventArgs e) { MailUserState state = e.UserState as MailUserState; if (state.CurMailMessage != null) { MailMessage message = state.CurMailMessage; this.InnerDisposeMessage(message); state.CurMailMessage = null; } if (state.IsSmpleMail) { if (state.AutoReleaseSmtp && state.CurSmtpClient != null) { //#if DEBUG // Debug.WriteLine("释放SmtpClient"); //#endif state.CurSmtpClient.Dispose(); state.CurSmtpClient = null; } } else { if (!e.Cancelled) // 取消的就不计数 CompletedSendCount++; if (state.AutoReleaseSmtp) { AutoDisposeSmtp(); } // 若批量异步发送,需要设置信号 //#if DEBUG // Debug.WriteLine("Set" + Thread.CurrentThread.ManagedThreadId); //#endif AutoResetEvent.Set(); } // 先释放资源,处理错误逻辑 if (e.Error != null && !state.IsErrorHandle) { throw e.Error; } } private MailMessage CreateMessagex() { #region 构建 MailMessage bool hasError = false; var mMailMessage = new MailMessage(); try { mMailMessage.From = new MailAddress(From, FromDisplayName); //增加收件人地址等 foreach (var item in To.Split(';'))//.Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.To.Add(item); } if (!string.IsNullOrEmpty(Cc)) { foreach (var item in Cc.Split(';').Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.CC.Add(item); } } if (!string.IsNullOrEmpty(Bcc)) { foreach (var item in Bcc.Split(';').Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.Bcc.Add(item); } } mMailMessage.Subject = Subject; mMailMessage.Body = Body; if (Attachments != null && Attachments.Count > 0) { foreach (Attachment attachment in Attachments) mMailMessage.Attachments.Add(attachment); } mMailMessage.SubjectEncoding = Encoding.UTF8; mMailMessage.BodyEncoding = Encoding.UTF8; // SmtpClient 的 Headers 中会根据 MailMessage 默认设置些值,所以应该为 UTF8 。 mMailMessage.HeadersEncoding = Encoding.UTF8; mMailMessage.IsBodyHtml = IsBodyHtml; if (AlternateViews != null && AlternateViews.Count > 0) { foreach (AlternateView alternateView in AlternateViews) { mMailMessage.AlternateViews.Add(alternateView); } } mMailMessage.Priority = (MailPriority)Priority; } catch (ArgumentNullException argumentNullEx) { hasError = true; throw argumentNullEx; } catch (ArgumentException argumentEx) { hasError = true; throw argumentEx; } catch (FormatException formatEx) { hasError = true; throw formatEx; } finally { if (hasError) { if (mMailMessage != null) { this.InnerDisposeMessage(mMailMessage); mMailMessage = null; } this.InnerDisposeSmtp(); } } return mMailMessage; #endregion 构建 MailMessage } ////// 释放 MailMessage 对象 /// private void InnerDisposeMessage(MailMessage message) { if (message != null) { if (message.AlternateViews.Count > 0) { message.AlternateViews.Dispose(); } message.Dispose(); message = null; } } ////// 发送Email /// private void InnerSendMessage() { bool hasError = false; var msg = CheckSendMail(); if (msg.Count > 0) { throw new FormatException(MailInfoHelper.GetMailInfoStr(msg)); } var mMailMessage = CreateMessagex(); if (!hasError) { if (m_IsAsync) { #region 异步发送邮件 if (PrepareSendCount == 1) { // 情况一:不重用 SmtpClient 实例会将PrepareSendCount设置为1 // 情况二:计划发送只有一条 // PrepareSendCount 是发送单条邮件。 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, IsSmpleMail = true, UserState = AsycUserState, }; if (m_autoDisposeSmtp) // 由发送完成回调函数根据 IsSmpleMail 字段进行释放 m_SmtpClient = null; ThreadPool.QueueUserWorkItem((userState) => { // 无需 catch 发送异常,因为是异步,所以这里 catch 不到。 MailUserState curUserState = userState as MailUserState; curUserState.CurSmtpClient.SendAsync(mMailMessage, userState); }, state); } else { // 情况一:重用 SmtpClient 逻辑,即我们可以直接操作全局的 m_SmtpClient // 情况二:批量发送邮件 PrepareSendCount>1 // 情况三:PrepareSendCount 还未设置,为0。比如场景在循环中做些判断,再决定发邮件,循环完才调用 SetBatchMailCount 设置计划邮件数量 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, UserState = AsycUserState, }; MessageQueue.Enqueue(state); Interlocked.Increment(ref m_messageQueueCount); if (m_SendMailThread == null) { m_SendMailThread = new Thread(() => { // noItemCount 次获取不到元素,就抛出线程异常 int noItemCount = 0; while (true) { if (PrepareSendCount != 0 && PrepareSendCount == CompletedSendCount) { // 已执行完毕。 this.AutoDisposeSmtp(); break; } else { MailUserState curUserState = null; if (!MessageQueue.IsEmpty) { //#if DEBUG // Debug.WriteLine("WaitOne" + Thread.CurrentThread.ManagedThreadId); //#endif // 当执行异步取消时,会清空MessageQueue,所以 WaitOne 必须在从MessageQueue中取到元素之前 AutoResetEvent.WaitOne(); if (MessageQueue.TryDequeue(out curUserState)) { Interlocked.Decrement(ref m_messageQueueCount); m_SmtpClient.SendAsync(curUserState.CurMailMessage, curUserState); } } else { if (noItemCount >= 10) { // 没有正确设置 PrepareSendCount 值。导致已没有邮件但此线程出现死循环 this.InnerDisposeSmtp(); throw new Exception(MailValidatorHelper.EMAIL_PREPARESENDCOUNT_NOTSET_ERROR); } Thread.Sleep(1000); noItemCount++; } } // SmtpClient 为null表示异步预计发送邮件数已经发送完,在 OnSendCompleted 进行了 m_SmtpClient 释放 if (m_SmtpClient == null) break; } m_SendMailThread = null; }); m_SendMailThread.Start(); } } #endregion 异步发送邮件 } else { #region 同步发送邮件 try { m_SmtpClient.Send(mMailMessage); m_CompletedSendCount++; } catch (ObjectDisposedException smtpDisposedEx) { throw smtpDisposedEx; } catch (InvalidOperationException smtpOperationEx) { throw smtpOperationEx; } catch (SmtpFailedRecipientsException smtpFailedRecipientsEx) { throw smtpFailedRecipientsEx; } catch (SmtpException smtpEx) { throw smtpEx; } finally { if (mMailMessage != null) { InnerDisposeMessage(mMailMessage); mMailMessage = null; } AutoDisposeSmtp(); } #endregion 同步发送邮件 } } } private void InnerSendMessageSync() { var msg = CheckSendMail(); if (msg.Count > 0) { throw new FormatException(MailInfoHelper.GetMailInfoStr(msg)); } try { var mMailMessage = CreateMessagex(); #region 异步发送邮件 if (PrepareSendCount == 1) { // 情况一:不重用 SmtpClient 实例会将PrepareSendCount设置为1 // 情况二:计划发送只有一条 m_SmtpClient.SendAsync(mMailMessage, AsycUserState); if (m_autoDisposeSmtp) { m_SmtpClient = null; } } else { // 情况一:重用 SmtpClient 逻辑,即我们可以直接操作全局的 m_SmtpClient // 情况二:批量发送邮件 PrepareSendCount>1 // 情况三:PrepareSendCount 还未设置,为0。比如场景在循环中做些判断,再决定发邮件,循环完才调用 SetBatchMailCount 设置计划邮件数量 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, UserState = AsycUserState, }; MessageQueue.Enqueue(state); Interlocked.Increment(ref m_messageQueueCount); if (m_SendMailThread == null) { m_SendMailThread = new Thread(() => { // noItemCount 次获取不到元素,就抛出线程异常 int noItemCount = 0; while (true) { if (PrepareSendCount != 0 && PrepareSendCount == CompletedSendCount) { // 已执行完毕。 this.AutoDisposeSmtp(); break; } else { MailUserState curUserState = null; if (!MessageQueue.IsEmpty) { //#if DEBUG // Debug.WriteLine("WaitOne" + Thread.CurrentThread.ManagedThreadId); //#endif // 当执行异步取消时,会清空MessageQueue,所以 WaitOne 必须在从MessageQueue中取到元素之前 AutoResetEvent.WaitOne(); if (MessageQueue.TryDequeue(out curUserState)) { Interlocked.Decrement(ref m_messageQueueCount); m_SmtpClient.SendAsync(curUserState.CurMailMessage, curUserState); } } else { if (noItemCount >= 10) { // 没有正确设置 PrepareSendCount 值。导致已没有邮件但此线程出现死循环 this.InnerDisposeSmtp(); throw new Exception(MailValidatorHelper.EMAIL_PREPARESENDCOUNT_NOTSET_ERROR); } Thread.Sleep(1000); noItemCount++; } } // SmtpClient 为null表示异步预计发送邮件数已经发送完,在 OnSendCompleted 进行了 m_SmtpClient 释放 if (m_SmtpClient == null) break; } m_SendMailThread = null; }); m_SendMailThread.Start(); } } #endregion 异步发送邮件 } catch (Exception e) { throw new FormatException(e.Message); } } #endregion 发送邮件 相关方法 #region 异步发送邮件,MessageQueue队列中缓冲的待发邮件数量,使用者可根据此数量来限制邮件数量,以免内存浪费 ////// 获取异步发送邮件,MessageQueue队列中缓冲的待发邮件数量 /// (使用者可根据此数量来限制邮件数量,以免内存浪费) /// public int GetAwaitMailCountAsync() { return Thread.VolatileRead(ref m_messageQueueCount); } #endregion 异步发送邮件,MessageQueue队列中缓冲的待发邮件数量,使用者可根据此数量来限制邮件数量,以免内存浪费 #region 发送邮件前检查 相关方法 ////// 发送邮件前检查需要设置的信息是否完整,收集(提示+错误)信息 /// public DictionaryCheckSendMail() { Dictionary dicMsg = new Dictionary (); InnerCheckSendMail4Info(dicMsg); InnerCheckSendMail4Error(dicMsg); return dicMsg; } /// /// 发送邮件前检查需要设置的信息是否完整,收集 错误 信息 /// /// 将检查信息收集到此集合 private void InnerCheckSendMail4Error(DictionarydicMsg) { #region 处理 发件/收件 if (string.IsNullOrEmpty(From)) { From = "h3bpm@renolit.com.cn"; FromDisplayName = "h3bpm"; } else { if (!MailValidatorHelper.IsEmail(From)) { string strTemp = string.Format(MailInfoHelper.GetMailInfoStr(MailInfoType.FromFormat), FromDisplayName, From); dicMsg.Add(MailInfoType.FromFormat, strTemp); } } if (string.IsNullOrEmpty(To)) { dicMsg.Add(MailInfoType.ToEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.ToEmpty)); } else { foreach (var item in To.Split(';')) { if (!MailValidatorHelper.IsEmail(item)) { string strTemp = string.Format(MailInfoHelper.GetMailInfoStr(MailInfoType.ToFormat), item, item); dicMsg.Add(MailInfoType.ToFormat, strTemp); } } } #endregion 处理 发件/收件 // SmtpClient 实例未设置 if (m_SmtpClient == null) dicMsg.Add(MailInfoType.SmtpClientEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.SmtpClientEmpty)); else { // SMTP 主服务器设置 (默认端口为25) if (m_SmtpClient.Host.Length == 0) dicMsg.Add(MailInfoType.HostEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.HostEmpty)); // SMPT 凭证 if (m_SmtpClient.EnableSsl && m_SmtpClient.ClientCertificates.Count == 0) dicMsg.Add(MailInfoType.CertificateEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.CertificateEmpty)); } } /// /// 发送邮件前检查需要设置的信息是否完整,收集 提示 信息 /// /// 将检查信息收集到此集合 private void InnerCheckSendMail4Info(DictionarydicMsg) { #region 处理 抄送/密送 Cc = Cc ?? ""; Bcc = Bcc ?? ""; #endregion 处理 抄送/密送 // 邮件主题 if (Subject.Length == 0) dicMsg.Add(MailInfoType.SubjectEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.SubjectEmpty)); // 邮件内容 if (Body.Length == 0 && (Attachments == null || (Attachments != null && Attachments.Count == 0)) ) { dicMsg.Add(MailInfoType.BodyEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.BodyEmpty)); } } #endregion 发送邮件前检查 相关方法 }}
using System;using System.Collections.Concurrent;using System.Collections.Generic;using System.Collections.ObjectModel;using System.ComponentModel;using System.IO;using System.Linq;using System.Net;using System.Net.Mail;using System.Net.Mime;using System.Text;using System.Threading;using System.Web;
namespace MailHelpers{ /// <summary> /// MailHelper 的摘要说明 /// </summary> public class MailHelper { #region 构造函数 /// <summary> /// 构建 MailHelper 实例 /// </summary> public MailHelper() { } /// <summary> /// 构建 MailHelper 实例 /// </summary> /// <param name="smtpclient">smtp服务器地址</param> /// <param name="port">端口</param> /// <param name="user">用户名</param> /// <param name="password">密码</param> public MailHelper(string smtpclient = null, int port = 0, string user = null, string password = null) { SmtpClientAdd = smtpclient; Port = port; User = user; Password = password; } /// <summary> /// 构建 MailHelper 实例 /// </summary> /// <param name="mSmtpClient">SmtpClient实例</param> /// <param name="autoReleaseSmtp">是否自动释放SmtpClient实例</param> public MailHelper(SmtpClient mSmtpClient, bool autoReleaseSmtp) { SetSmtpClient(mSmtpClient, autoReleaseSmtp); } #endregion 构造函数 #region 公开属性 private int priority = 0; /// <summary> /// 设置此电子邮件的密送地址列表,分号(;)分隔。 /// </summary> public string Bcc { get; set; } /// <summary> /// 设置邮件正文。 /// </summary> public string Body { get; set; } /// <summary> /// 设置此电子邮件的抄送地址列表,分号(;)分隔。 /// </summary> public string Cc { get; set; } /// <summary> /// 设置此电子邮件的发信人地址。 /// </summary> public string From { get; set; } /// <summary> /// 设置此电子邮件的发信人地址。 /// </summary> public string FromDisplayName { get; set; } /// <summary> /// 设置邮件正文是否为 Html 格式的值。 /// </summary> public bool IsBodyHtml { get; set; } /// <summary> /// 异步发送标志 /// </summary> public bool m_IsAsync { get; set; } /// <summary> /// 设置此电子邮件的优先级 0-Normal 1-Low 2-High /// 默认Normal。 /// </summary> public int Priority { get { return this.priority; } set { if (value < 0 || value > 2) priority = 0; else priority = value; } } /// <summary> /// 设置此电子邮件的主题。 /// </summary> public string Subject { get; set; } /// <summary> /// 设置此电子邮件的收件地址列表,分号(;)分隔。 /// </summary> public string To { get; set; } #endregion 公开属性 #region 内部字段、属性 /// <summary> /// 默认为false。设置在 MailHelper 类内部,发送完邮件后是否自动释放 SmtpClient 实例 /// Smtp不管是在 MailHelper 内部还是在外部都必须进行主动释放, /// 因为:SmtpClient 没有提供 Finalize() 终结器,所以GC不会进行回收,只能使用完后主动进行释放,否则会发生内存泄露问题。 /// /// 何时将 autoReleaseSmtp 设置为false,就是SmtpClient需要重复使用的情况,即需要使用“相同MailHelper”向“相同Smtp服务器”发送大批量的邮件时。 /// </summary> private bool m_autoDisposeSmtp = false; // 指定一个电子邮件不同格式显示的副本。 private Collection<AlternateView> AlternateViews { get; set; } // 附件集合 private Collection<Attachment> Attachments { get; set; } private SmtpClient m_SmtpClient { get; set; } /// <summary> /// smtp密码 /// </summary> private string Password { get; set; } /// <summary> /// smtp端口 /// </summary> private int Port { get; set; } /// <summary> /// smtp服务器地址 /// </summary> private string SmtpClientAdd { get; set; } /// <summary> /// smtp用户名 /// </summary> private string User { get; set; } #endregion 内部字段、属性 #region 计划邮件数量 和 已执行完成邮件数量 // 记录和获取在大批量执行异步短信发送时已经处理了多少条记录 // 1、根据此值手动或自动释放 SmtpClient .实际上没有需要根据此值进行手动释放,因为完全可以用自动释放替换此逻辑 // 2、根据此值可以自己设置进度 private long m_CompletedSendCount = 0; // 计划邮件数量 private long m_PrepareSendCount = 0; public long CompletedSendCount { get { return Interlocked.Read(ref m_CompletedSendCount); } private set { Interlocked.Exchange(ref m_CompletedSendCount, value); } } public long PrepareSendCount { get { return Interlocked.Read(ref m_PrepareSendCount); } private set { Interlocked.Exchange(ref m_PrepareSendCount, value); } } #endregion 计划邮件数量 和 已执行完成邮件数量 #region 异步 发送邮件相关参数 // 案例:因为异步发送邮件在SmtpClient处必须加锁保证一封一封的发送。 // 这样阻塞了主线程。所以换用队列的方式以无阻塞的方式进行异步发送大批量邮件 private AutoResetEvent m_AutoResetEvent = null; // 因为 MessageQueue 可能在 m_SendMailThread 线程中进行出队操作,所以使用并发队列ConcurrentQueue. // 队列中的数据只能通过取消异步发送进行清空,或则就会每一元素都执行发送邮件 private ConcurrentQueue<MailUserState> m_MessageQueue = null; // 待发送队列缓存数量。单独开个计数是为了提高获取此计数的效率 private int m_messageQueueCount = 0; // 发送任务可能很长,所以使用 Thread 而不是用ThreadPool。(避免长时间暂居线程池线程),并且SmtpClient只支持一次一封邮件发送 private Thread m_SendMailThread = null; /// <summary> /// 在执行异步发送时传递的对象,用于传递给异步发生完成时调用的方法 OnSendCompleted 。 /// </summary> public object AsycUserState { get; set; } private AutoResetEvent AutoResetEvent { get { if (m_AutoResetEvent == null) m_AutoResetEvent = new AutoResetEvent(true); return m_AutoResetEvent; } } private ConcurrentQueue<MailUserState> MessageQueue { get { if (m_MessageQueue == null) m_MessageQueue = new ConcurrentQueue<MailUserState>(); return m_MessageQueue; } } #endregion 异步 发送邮件相关参数 #region SmtpClient 相关方法 /// <summary> /// 根据默认值创建一个链接 /// </summary> public SmtpClient CreatSmtpClient() { var smtp = new SmtpClient(SmtpClientAdd, Port); smtp.EnableSsl = false; smtp.UseDefaultCredentials = false; smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.Credentials = new NetworkCredential(User, Password); smtp.Timeout = 100000; return smtp; } /// <summary> /// 检查此 MailHelper 实例是否已经设置了 SmtpClient /// </summary> /// <returns>true代表已设置</returns> public bool ExistsSmtpClient() { return m_SmtpClient != null; } /// <summary> /// 释放 SmtpClient /// </summary> public void ManualDisposeSmtp() { this.InnerDisposeSmtp(); } /// <summary> /// 设置 SmtpClient 实例 和是否自动释放Smtp的唯一入口 /// 1、将内部 计划数量 和 已完成数量 清零,重新统计以便自动释放SmtpClient /// 2、若要对SmtpClent设置SendCompleted事件,请在调用此方法前进行设置 /// </summary> /// <param name="mSmtpClient"> SmtpClient 实例</param> /// <param name="autoReleaseSmtp">设置在 MailHelper 类内部,发送完邮件后是否自动释放 SmtpClient 实例</param> public void SetSmtpClient(SmtpClient mSmtpClient, bool autoReleaseSmtp) { //#if DEBUG // Debug.WriteLine("设置SmtpClient,自动释放为" + (autoReleaseSmtp ? "TRUE" : "FALSE")); //#endif m_SmtpClient = mSmtpClient; m_autoDisposeSmtp = autoReleaseSmtp; // 将内部 计划数量 和 已完成数量 清零,重新统计以便自动释放SmtpClient (MailHelper实例唯一的清零地方) //m_PrepareSendCount = 0; m_CompletedSendCount = 0; // 注册回调事件.释放对象---该事件不进行取消注册,只在释放SmtpClient时,一起释放 (所以SmtpClient与MailHelper绑定后,就不要再单独使用了) m_SmtpClient.SendCompleted += SendCompleted4Dispose; } /// <summary> /// 释放SmtpClient /// </summary> private void AutoDisposeSmtp() { if (m_autoDisposeSmtp && m_SmtpClient != null) { if (PrepareSendCount == 0) { // PrepareSendCount=0 说明还未设置计划批量邮件数,所以不自动释放SmtpClient。 // 不能因为小于CompletedSendCount就报错,因为可能是先发送再设置计划邮件数量 } else if (PrepareSendCount < CompletedSendCount) { throw new Exception(MailValidatorHelper.EMAIL_ASYNC_SEND_PREPARE_ERROR); } else if (PrepareSendCount == CompletedSendCount) { InnerDisposeSmtp(); } } else { // 不清空和Dispose()内部的SmtpClient字段,即用在需要重复使用时不需要再调用 SetSmtpClient() 进行设置。 } } /// <summary> /// 释放SmtpClient /// </summary> private void InnerDisposeSmtp() { if (m_SmtpClient != null) { //#if DEBUG // Debug.WriteLine("释放SMtpClient"); //#endif m_SmtpClient.Dispose(); m_SmtpClient = null; // 在设置 SmtpClient 入口处重新进行设置 m_autoDisposeSmtp = false; PrepareSendCount = 0; CompletedSendCount = 0; } } #endregion SmtpClient 相关方法 #region 发送邮件 相关方法 /// <summary> /// 取消异步邮件发送 /// </summary> public void SendAsyncCancel() { // 因为此类为非线程安全类,所以 SendAsyncCancel 和发送邮件方法中操作MessageQueue部分的代码肯定是串行化的。 // 所以不存在一边入队,一边出队导致无法完全取消所有邮件发送 // 1、清空队列。 // 2、取消正在异步发送的mail。 // 3、设置计划数量=完成数量 // 4、执行 AutoDisposeSmtp() // 1、清空队列。 MailUserState tempMailUserState = null; while (MessageQueue.TryDequeue(out tempMailUserState)) { Interlocked.Decrement(ref m_messageQueueCount); MailMessage message = tempMailUserState.CurMailMessage; InnerDisposeMessage(message); } tempMailUserState = null; // 2、取消正在异步发送的mail。 m_SmtpClient.SendAsyncCancel(); // 3、设置计划数量=完成数量 PrepareSendCount = CompletedSendCount; // 4、执行 AutoDisposeSmtp() AutoDisposeSmtp(); } /// <summary> /// 发送一封邮件 /// </summary> /// <param name="subject">邮件标题</param> /// <param name="body">邮件正文</param> /// <param name="to">收件列表(;分隔)</param> /// <param name="cc">抄送列表(;分隔)</param> /// <param name="bcc">密送列表(;分隔)</param> public void SendMail(string subject, string body, string to, string cc = null, string bcc = null, string from = null, string fromName = null) { SetMailInfo(subject, body, to, cc, bcc, from, fromName); m_PrepareSendCount = 1; SendMail(); } /// <summary> /// 发送邮件 /// </summary> /// <param name="smtpClient">smtp链接,如不设置则自动根据默认值创建一个</param> /// <param name="autoReleaseSmtp">是否自动释放smtp链接</param> public void SendMail(SmtpClient smtpClient = null, bool autoReleaseSmtp = true) { SetSmtpClient(smtpClient ?? CreatSmtpClient(), autoReleaseSmtp); InnerSendMessage(); } /// <summary> /// 计划批量发送邮件的个数,配合自动释放SmtpClient。(批量邮件发送不调用此方法就不会自动释放SmtpClient) /// 0、此方法可以在发送邮件方法之前或之后调用 /// 1、只有设置后才会自动根据 m_autoDisposeSmtp 字段进行释放SmtpClient。 /// 2、若 m_autoDisposeSmtp = false 即由自己手动进行设置的无需调用此方法设置预计邮件数 /// </summary> /// <param name="preCount">计划邮件数量</param> public void SetBatchMailCount(long preCount) { PrepareSendCount = preCount; if (preCount < CompletedSendCount) { throw new ArgumentOutOfRangeException(nameof(preCount), MailValidatorHelper.EMAIL_ASYNC_SEND_PREPARE_ERROR); } if (preCount == CompletedSendCount) { if (m_autoDisposeSmtp) InnerDisposeSmtp(); } } /// <summary> /// 设置邮件基本信息 /// </summary> /// <param name="subject">邮件标题</param> /// <param name="body">邮件正文</param> /// <param name="to">收件列表(;分隔)</param> /// <param name="cc">抄送列表(;分隔)</param> /// <param name="bcc">密送列表(;分隔)</param> /// <param name="isbodyhtml">邮件内容是否html格式</param> /// <param name="priority">邮件优先级 0-Normal 1-Low 2-High</param> public void SetMailInfo(string subject, string body, string to, string cc = null, string bcc = null, string from = null, string fromName = null, bool isbodyhtml = true, int priority = 0) { Subject = subject; Body = body; To = to; Cc = cc ?? ""; Bcc = bcc ?? ""; From = from ?? ""; FromDisplayName = fromName ?? ""; IsBodyHtml = isbodyhtml; Priority = priority; } /// <summary> /// 声明在 SmtpClient.SendAsync() 执行完后释放相关对象的回调方法 最后触发的委托 /// </summary> protected void SendCompleted4Dispose(object sender, AsyncCompletedEventArgs e) { MailUserState state = e.UserState as MailUserState; if (state.CurMailMessage != null) { MailMessage message = state.CurMailMessage; this.InnerDisposeMessage(message); state.CurMailMessage = null; } if (state.IsSmpleMail) { if (state.AutoReleaseSmtp && state.CurSmtpClient != null) { //#if DEBUG // Debug.WriteLine("释放SmtpClient"); //#endif state.CurSmtpClient.Dispose(); state.CurSmtpClient = null; } } else { if (!e.Cancelled) // 取消的就不计数 CompletedSendCount++; if (state.AutoReleaseSmtp) { AutoDisposeSmtp(); } // 若批量异步发送,需要设置信号 //#if DEBUG // Debug.WriteLine("Set" + Thread.CurrentThread.ManagedThreadId); //#endif AutoResetEvent.Set(); } // 先释放资源,处理错误逻辑 if (e.Error != null && !state.IsErrorHandle) { throw e.Error; } } private MailMessage CreateMessagex() { #region 构建 MailMessage bool hasError = false; var mMailMessage = new MailMessage(); try { mMailMessage.From = new MailAddress(From, FromDisplayName); //增加收件人地址等 foreach (var item in To.Split(';'))//.Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.To.Add(item); } if (!string.IsNullOrEmpty(Cc)) { foreach (var item in Cc.Split(';').Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.CC.Add(item); } } if (!string.IsNullOrEmpty(Bcc)) { foreach (var item in Bcc.Split(';').Where(s => MailValidatorHelper.IsEmail(s))) { mMailMessage.Bcc.Add(item); } } mMailMessage.Subject = Subject; mMailMessage.Body = Body; if (Attachments != null && Attachments.Count > 0) { foreach (Attachment attachment in Attachments) mMailMessage.Attachments.Add(attachment); } mMailMessage.SubjectEncoding = Encoding.UTF8; mMailMessage.BodyEncoding = Encoding.UTF8; // SmtpClient 的 Headers 中会根据 MailMessage 默认设置些值,所以应该为 UTF8 。 mMailMessage.HeadersEncoding = Encoding.UTF8; mMailMessage.IsBodyHtml = IsBodyHtml; if (AlternateViews != null && AlternateViews.Count > 0) { foreach (AlternateView alternateView in AlternateViews) { mMailMessage.AlternateViews.Add(alternateView); } } mMailMessage.Priority = (MailPriority)Priority; } catch (ArgumentNullException argumentNullEx) { hasError = true; throw argumentNullEx; } catch (ArgumentException argumentEx) { hasError = true; throw argumentEx; } catch (FormatException formatEx) { hasError = true; throw formatEx; } finally { if (hasError) { if (mMailMessage != null) { this.InnerDisposeMessage(mMailMessage); mMailMessage = null; } this.InnerDisposeSmtp(); } } return mMailMessage; #endregion 构建 MailMessage } /// <summary> /// 释放 MailMessage 对象 /// </summary> private void InnerDisposeMessage(MailMessage message) { if (message != null) { if (message.AlternateViews.Count > 0) { message.AlternateViews.Dispose(); } message.Dispose(); message = null; } } /// <summary> /// 发送Email /// </summary> private void InnerSendMessage() { bool hasError = false; var msg = CheckSendMail(); if (msg.Count > 0) { throw new FormatException(MailInfoHelper.GetMailInfoStr(msg)); } var mMailMessage = CreateMessagex(); if (!hasError) { if (m_IsAsync) { #region 异步发送邮件 if (PrepareSendCount == 1) { // 情况一:不重用 SmtpClient 实例会将PrepareSendCount设置为1 // 情况二:计划发送只有一条 // PrepareSendCount 是发送单条邮件。 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, IsSmpleMail = true, UserState = AsycUserState, }; if (m_autoDisposeSmtp) // 由发送完成回调函数根据 IsSmpleMail 字段进行释放 m_SmtpClient = null; ThreadPool.QueueUserWorkItem((userState) => { // 无需 catch 发送异常,因为是异步,所以这里 catch 不到。 MailUserState curUserState = userState as MailUserState; curUserState.CurSmtpClient.SendAsync(mMailMessage, userState); }, state); } else { // 情况一:重用 SmtpClient 逻辑,即我们可以直接操作全局的 m_SmtpClient // 情况二:批量发送邮件 PrepareSendCount>1 // 情况三:PrepareSendCount 还未设置,为0。比如场景在循环中做些判断,再决定发邮件,循环完才调用 SetBatchMailCount 设置计划邮件数量 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, UserState = AsycUserState, }; MessageQueue.Enqueue(state); Interlocked.Increment(ref m_messageQueueCount); if (m_SendMailThread == null) { m_SendMailThread = new Thread(() => { // noItemCount 次获取不到元素,就抛出线程异常 int noItemCount = 0; while (true) { if (PrepareSendCount != 0 && PrepareSendCount == CompletedSendCount) { // 已执行完毕。 this.AutoDisposeSmtp(); break; } else { MailUserState curUserState = null; if (!MessageQueue.IsEmpty) { //#if DEBUG // Debug.WriteLine("WaitOne" + Thread.CurrentThread.ManagedThreadId); //#endif // 当执行异步取消时,会清空MessageQueue,所以 WaitOne 必须在从MessageQueue中取到元素之前 AutoResetEvent.WaitOne(); if (MessageQueue.TryDequeue(out curUserState)) { Interlocked.Decrement(ref m_messageQueueCount); m_SmtpClient.SendAsync(curUserState.CurMailMessage, curUserState); } } else { if (noItemCount >= 10) { // 没有正确设置 PrepareSendCount 值。导致已没有邮件但此线程出现死循环 this.InnerDisposeSmtp(); throw new Exception(MailValidatorHelper.EMAIL_PREPARESENDCOUNT_NOTSET_ERROR); } Thread.Sleep(1000); noItemCount++; } } // SmtpClient 为null表示异步预计发送邮件数已经发送完,在 OnSendCompleted 进行了 m_SmtpClient 释放 if (m_SmtpClient == null) break; } m_SendMailThread = null; }); m_SendMailThread.Start(); } } #endregion 异步发送邮件 } else { #region 同步发送邮件 try { m_SmtpClient.Send(mMailMessage); m_CompletedSendCount++; } catch (ObjectDisposedException smtpDisposedEx) { throw smtpDisposedEx; } catch (InvalidOperationException smtpOperationEx) { throw smtpOperationEx; } catch (SmtpFailedRecipientsException smtpFailedRecipientsEx) { throw smtpFailedRecipientsEx; } catch (SmtpException smtpEx) { throw smtpEx; } finally { if (mMailMessage != null) { InnerDisposeMessage(mMailMessage); mMailMessage = null; } AutoDisposeSmtp(); } #endregion 同步发送邮件 } } } private void InnerSendMessageSync() { var msg = CheckSendMail(); if (msg.Count > 0) { throw new FormatException(MailInfoHelper.GetMailInfoStr(msg)); } try { var mMailMessage = CreateMessagex(); #region 异步发送邮件 if (PrepareSendCount == 1) { // 情况一:不重用 SmtpClient 实例会将PrepareSendCount设置为1 // 情况二:计划发送只有一条 m_SmtpClient.SendAsync(mMailMessage, AsycUserState); if (m_autoDisposeSmtp) { m_SmtpClient = null; } } else { // 情况一:重用 SmtpClient 逻辑,即我们可以直接操作全局的 m_SmtpClient // 情况二:批量发送邮件 PrepareSendCount>1 // 情况三:PrepareSendCount 还未设置,为0。比如场景在循环中做些判断,再决定发邮件,循环完才调用 SetBatchMailCount 设置计划邮件数量 MailUserState state = new MailUserState() { AutoReleaseSmtp = m_autoDisposeSmtp, CurMailMessage = mMailMessage, CurSmtpClient = m_SmtpClient, UserState = AsycUserState, }; MessageQueue.Enqueue(state); Interlocked.Increment(ref m_messageQueueCount); if (m_SendMailThread == null) { m_SendMailThread = new Thread(() => { // noItemCount 次获取不到元素,就抛出线程异常 int noItemCount = 0; while (true) { if (PrepareSendCount != 0 && PrepareSendCount == CompletedSendCount) { // 已执行完毕。 this.AutoDisposeSmtp(); break; } else { MailUserState curUserState = null; if (!MessageQueue.IsEmpty) { //#if DEBUG // Debug.WriteLine("WaitOne" + Thread.CurrentThread.ManagedThreadId); //#endif // 当执行异步取消时,会清空MessageQueue,所以 WaitOne 必须在从MessageQueue中取到元素之前 AutoResetEvent.WaitOne(); if (MessageQueue.TryDequeue(out curUserState)) { Interlocked.Decrement(ref m_messageQueueCount); m_SmtpClient.SendAsync(curUserState.CurMailMessage, curUserState); } } else { if (noItemCount >= 10) { // 没有正确设置 PrepareSendCount 值。导致已没有邮件但此线程出现死循环 this.InnerDisposeSmtp(); throw new Exception(MailValidatorHelper.EMAIL_PREPARESENDCOUNT_NOTSET_ERROR); } Thread.Sleep(1000); noItemCount++; } } // SmtpClient 为null表示异步预计发送邮件数已经发送完,在 OnSendCompleted 进行了 m_SmtpClient 释放 if (m_SmtpClient == null) break; } m_SendMailThread = null; }); m_SendMailThread.Start(); } } #endregion 异步发送邮件 } catch (Exception e) { throw new FormatException(e.Message); } } #endregion 发送邮件 相关方法 #region 异步发送邮件,MessageQueue队列中缓冲的待发邮件数量,使用者可根据此数量来限制邮件数量,以免内存浪费 /// <summary> /// 获取异步发送邮件,MessageQueue队列中缓冲的待发邮件数量 /// (使用者可根据此数量来限制邮件数量,以免内存浪费) /// </summary> public int GetAwaitMailCountAsync() { return Thread.VolatileRead(ref m_messageQueueCount); } #endregion 异步发送邮件,MessageQueue队列中缓冲的待发邮件数量,使用者可根据此数量来限制邮件数量,以免内存浪费 #region 发送邮件前检查 相关方法 /// <summary> /// 发送邮件前检查需要设置的信息是否完整,收集(提示+错误)信息 /// </summary> public Dictionary<MailInfoType, string> CheckSendMail() { Dictionary<MailInfoType, string> dicMsg = new Dictionary<MailInfoType, string>(); InnerCheckSendMail4Info(dicMsg); InnerCheckSendMail4Error(dicMsg); return dicMsg; } /// <summary> /// 发送邮件前检查需要设置的信息是否完整,收集 错误 信息 /// </summary> /// <param name="dicMsg">将检查信息收集到此集合</param> private void InnerCheckSendMail4Error(Dictionary<MailInfoType, string> dicMsg) { #region 处理 发件/收件 if (string.IsNullOrEmpty(From)) { From = "h3bpm@renolit.com.cn"; FromDisplayName = "h3bpm"; } else { if (!MailValidatorHelper.IsEmail(From)) { string strTemp = string.Format(MailInfoHelper.GetMailInfoStr(MailInfoType.FromFormat), FromDisplayName, From); dicMsg.Add(MailInfoType.FromFormat, strTemp); } } if (string.IsNullOrEmpty(To)) { dicMsg.Add(MailInfoType.ToEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.ToEmpty)); } else { foreach (var item in To.Split(';')) { if (!MailValidatorHelper.IsEmail(item)) { string strTemp = string.Format(MailInfoHelper.GetMailInfoStr(MailInfoType.ToFormat), item, item); dicMsg.Add(MailInfoType.ToFormat, strTemp); } } } #endregion 处理 发件/收件 // SmtpClient 实例未设置 if (m_SmtpClient == null) dicMsg.Add(MailInfoType.SmtpClientEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.SmtpClientEmpty)); else { // SMTP 主服务器设置 (默认端口为25) if (m_SmtpClient.Host.Length == 0) dicMsg.Add(MailInfoType.HostEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.HostEmpty)); // SMPT 凭证 if (m_SmtpClient.EnableSsl && m_SmtpClient.ClientCertificates.Count == 0) dicMsg.Add(MailInfoType.CertificateEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.CertificateEmpty)); } } /// <summary> /// 发送邮件前检查需要设置的信息是否完整,收集 提示 信息 /// </summary> /// <param name="dicMsg">将检查信息收集到此集合</param> private void InnerCheckSendMail4Info(Dictionary<MailInfoType, string> dicMsg) { #region 处理 抄送/密送 Cc = Cc ?? ""; Bcc = Bcc ?? ""; #endregion 处理 抄送/密送 // 邮件主题 if (Subject.Length == 0) dicMsg.Add(MailInfoType.SubjectEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.SubjectEmpty)); // 邮件内容 if (Body.Length == 0 && (Attachments == null || (Attachments != null && Attachments.Count == 0)) ) { dicMsg.Add(MailInfoType.BodyEmpty, MailInfoHelper.GetMailInfoStr(MailInfoType.BodyEmpty)); } } #endregion 发送邮件前检查 相关方法 }}