C#一个完整的电子邮件操作类

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/// <summary> /// 电子邮件操作类。 /// </summary>     public class Mail     {         /// <summary> /// 初始化一个电子邮件操作类的空实例。 /// </summary>         public Mail()         {         }         /// <summary> /// 初始化一个电子邮件操作类的实例。 /// </summary> /// <param name="from">发件人的电子邮件地址。</param> /// <param name="fromName">发件人的姓名。</param> /// <param name="recipient">收件人的电子邮件地址。</param> /// <param name="recipientName">收件人的姓名。</param> /// <param name="subject">电子邮件的主题。</param> /// <param name="body">电子邮件的内容。</param> /// <param name="host">电子邮件的服务器地址。</param> /// <param name="port">电子邮件的主机端口号。</param> /// <param name="username">登录电子邮件服务器的用户名。</param> /// <param name="password">登录电子邮件服务器的用户密码。</param> /// <param name="isBodyHtml">邮件的正文是否是HTML格式。</param> /// <param name="file">邮件附件的文件路径。</param>         public Mail(string from, string fromName, string recipient, string recipientName, string subject, string body, string host, int port, string username, string password, bool isBodyHtml, string filepath)         {             this._from = from;             this._fromName = fromName;             this._recipient = recipient;             this._recipientName = recipientName;             this._subject = subject;             this._body = body;             this._serverHost = host;             this._serverPort = port;             this._username = username;             this._password = password;             this._isBodyHtml = isBodyHtml;             this._attachment.Add(filepath);         }         /// <summary> /// 初始化一个电子邮件操作类的实例。 /// </summary> /// <param name="from">发件人的电子邮件地址。</param> /// <param name="fromName">发件人的姓名。</param> /// <param name="recipient">收件人的电子邮件地址。</param> /// <param name="recipientName">收件人的姓名。</param> /// <param name="subject">电子邮件的主题。</param> /// <param name="body">电子邮件的内容。</param> /// <param name="host">电子邮件的服务器地址。</param> /// <param name="port">电子邮件的主机端口号。</param> /// <param name="username">登录电子邮件服务器的用户名。</param> /// <param name="password">登录电子邮件服务器的用户密码。</param> /// <param name="isBodyHtml">邮件的正文是否是HTML格式。</param>         public Mail(string from, string fromName, string recipient, string recipientName, string subject, string body, string host, int port, string username, string password, bool isBodyHtml)             : this(from, fromName, recipient, recipientName, subject, body, host, 25, username, password, isBodyHtml, null)         {         }          /// <summary> /// 初始化一个电子邮件操作类的实例。 /// </summary> /// <param name="from">发件人的电子邮件地址。</param> /// <param name="fromName">发件人的姓名。</param> /// <param name="recipient">收件人的电子邮件地址。</param> /// <param name="recipientName">收件人的姓名。</param> /// <param name="subject">电子邮件的主题。</param> /// <param name="body">电子邮件的内容。</param> /// <param name="host">电子邮件的服务器地址。</param> /// <param name="port">电子邮件的主机端口号。</param> /// <param name="username">登录电子邮件服务器的用户名。</param> /// <param name="password">登录电子邮件服务器的用户密码。</param> /// <param name="isBodyHtml">邮件的正文是否是HTML格式。</param>         public Mail(string from, string fromName, string recipient, string recipientName, string subject, string body, string host,  string username, string password)             : this(from, fromName, recipient, recipientName, subject, body, host, 25, username, password, false, null)         {         }         /// <summary> /// 初始化一个电子邮件操作类的实例（邮件的正文非HTML格式，端口默认25）。 /// </summary> /// <param name="from">发件人的电子邮件地址。</param> /// <param name="recipient">收件人的电子邮件地址。</param> /// <param name="subject">电子邮件的主题。</param> /// <param name="body">电子邮件的内容。</param> /// <param name="host">电子邮件的服务器地址。</param> /// <param name="username">登录电子邮件服务器的用户名。</param> /// <param name="password">登录电子邮件服务器的用户密码。</param> /// <param name="isBodyHtml">邮件的正文是否是HTML格式。</param>         public Mail(string from, string recipient,  string subject, string body, string host, string username, string password)             : this(from, null, recipient, null, subject, body, host, 25, username, password, false, null)         {         }         /// <summary> /// 初始化一个电子邮件操作类的实例（邮件的正文非HTML格式，端口默认25）。 /// </summary> /// <param name="from">发件人的电子邮件地址。</param> /// <param name="recipient">收件人的电子邮件地址。</param> /// <param name="subject">电子邮件的主题。</param> /// <param name="body">电子邮件的内容。</param> /// <param name="port">电子邮件的主机端口号。</param> /// <param name="host">电子邮件的服务器地址。</param> /// <param name="username">登录电子邮件服务器的用户名。</param> /// <param name="password">登录电子邮件服务器的用户密码。</param>         public Mail(string from, string recipient, string subject, string body, string host, int port, string username, string password)             : this(from, null, recipient, null, subject, body, host, port, username, password, false, null)         {         }          private string _subject;         private string _body;         private string _from;         private string _fromName;         private string _recipientName;         private string _serverHost;         private int _serverPort;         private string _username;         private string _password;         private bool _isBodyHtml;         private string _recipient;         private List<string> _attachment = new List<string> { };          /// <summary> /// 获取或设置邮件的主题。 /// </summary>         public string Subject         {             get { return this._subject; }             set { this._subject = value; }         }          /// <summary> /// 获取或设置邮件的正文内容。 /// </summary>         public string Body         {             get { return this._body; }             set { this._body = value; }         }          /// <summary> /// 获取或设置发件人的邮件地址。 /// </summary>         public string From         {             get { return this._from; }             set { this._from = value; }         }          /// <summary> /// 获取或设置发件人的姓名。 /// </summary>         public string FromName         {             get { return this._fromName; }             set { this._fromName = value; }         }          /// <summary> /// 获取或设置收件人的姓名。 /// </summary>         public string RecipientName         {             get { return this._recipientName; }             set { this._recipientName = value; }         }          /// <summary> /// 获取或设置收件人的邮件地址。 /// </summary>         public string Recipient         {             get { return this._recipient; }             set { this._recipient = value; }         }          /// <summary> /// 获取或设置邮件服务器主机地址。 /// </summary>         public string ServerHost         {             get { return this._serverHost; }             set { this._serverHost = value; }         }          /// <summary> /// 获取或设置邮件服务器的端口号。 /// </summary>         public int ServerPort         {             set { this._serverPort = value; }             get { return this._serverPort; }         }           /// <summary> /// 获取或设置SMTP认证时使用的用户名。 /// </summary>         public string Username         {             get { return this._username; }             set             {                 if (value.Trim() != "")                 {                     this._username = value.Trim();                 }                 else                 {                     this._username = "";                 }             }         }          /// <summary> /// 获取或设置SMTP认证时使用的密码。 /// </summary>         public string Password         {             set { this._password = value; }             get { return this._password; }         }          /// <summary> /// 获取或设置指示邮件正文是否为 Html 格式的值。 /// </summary>         public bool IsBodyHtml         {             get { return this._isBodyHtml; }             set { this._isBodyHtml = value; }         }          /// <summary> /// 获取电子邮件附件。 /// </summary>         public List<string> Attachment         {             get { return this._attachment; }             set { this._attachment = value; }         }          ///// <summary> ///// 添加一个收件人的邮箱地址。 ///// </summary> ///// <param name="mailList">联系人列表。</param> ///// <returns></returns>         //public bool AddRecipient(params string[] mailList) //{ //    this.Recipient = mailList[0].Trim(); //    return true; //}          /// <summary> /// 添加电子邮件附件。 /// </summary> /// <param name="fileList">文件列表。</param> /// <returns>是否添加成功。</returns>         public bool AddAttachment(params string[] fileList)         {             if (fileList.Length > 0)             {                 foreach (string file in fileList)                 {                     if (file != null)                     {                         this._attachment.Add(file);                     }                     else                     {                         return false;                     }                 }                 return true;             }             else             {                 return false;             }         }         /// <summary> /// 发送电子邮件。 /// </summary> /// <returns>是否发送成功。</returns>         public bool Send()         {             //初始化 MailMessage 对象。             MailMessage mail = new MailMessage();             Encoding encoding = Encoding.GetEncoding("utf-8");             mail.From = new MailAddress(this.From, this.FromName, encoding);             mail.To.Add(new MailAddress(this.Recipient, this.RecipientName));             mail.Subject = this.Subject;             mail.IsBodyHtml = this.IsBodyHtml;             mail.Body = this.Body;             mail.Priority = MailPriority.Normal;             mail.BodyEncoding = encoding;             if (this.Attachment.Count > 0)             {                 foreach (string file in this.Attachment)                 {                     mail.Attachments.Add(new Attachment(file));                 }             }             //初始化 SmtpClient 对象。             SmtpClient smtp = new SmtpClient();             smtp.Host = this.ServerHost;             smtp.Port = this.ServerPort;             smtp.Credentials = new NetworkCredential(this.Username, this.Password);             if (smtp.Port != 25)             {                 smtp.EnableSsl = true;             }             try             {                 smtp.Send(mail);             }             catch (SmtpException ex)             {                 string message = ex.Message;                 return false;             }             return true;         }     }
C#一个完整的电子邮件操作类