using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;
namespace devApp.MailClass
{
    class smtpmail
    {

        /*  
        Create By lion  
        2002-11-20 01:44  
        Copyright (C) 2001,2002 www.LionSky.Net. All rights reserved. 
        Web: http://www.Lionsky.net ;;
        Email: lion-a@sohu.com 
        Support .Net Framework Beta 2  
        */
        public class ESmtpMail
        {
            private string enter = "\r\n";
            /// <summary> 
            /// 設定語言代碼，默認設定為GB2312，如不需要可設置為"" 
            /// </summary> 
            public string Charset = "GB2312";
            /// <summary> 
            /// 發件人地址 
            /// </summary> 
            public string From = "";
            /// <summary> 
            /// 發件人姓名 
            /// </summary> 
            public string FromName = "";
            /// <summary> 
            /// 回復郵件地址 
            /// </summary> 
            //public string ReplyTo=""; 
            /// <summary> 
            /// 收件人姓名 
            /// </summary>    
            public string RecipientName = "";
            /// <summary> 
            /// 收件人列表 
            /// </summary> 
            private Hashtable Recipient = new Hashtable();
            /// <summary> 
            /// 郵件服務器域名 
            /// </summary>    
            private string mailserver = "";
            /// <summary> 
            /// 郵件服務器端口號 
            /// </summary>    
            private int mailserverport = 25;
            /// <summary> 
            /// SMTP認證時使用的用戶名 
            /// </summary> 
            private string username = "";
            /// <summary> 
            /// SMTP認證時使用的密碼 
            /// </summary> 
            private string password = "";
            /// <summary> 
            /// 是否需要SMTP驗證 
            /// </summary>       
            private bool ESmtp = false;
            /// <summary> 
            /// 是否Html郵件 
            /// </summary>       
            public bool Html = false;
            /// <summary> 
            /// 郵件附件列表 
            /// </summary> 
            private System.Collections.ArrayList Attachments;
            /// <summary> 
            /// 郵件發送優先級，可設置為"High","Normal","Low"或"1","3","5" 
            /// </summary> 
            private string priority = "Normal";
            /// <summary> 
            /// 郵件主題 
            /// </summary>       
            public string Subject = "";
            /// <summary> 
            /// 郵件正文 
            /// </summary>       
            public string Body = "";
            /// <summary> 
            /// 收件人數量 
            /// </summary> 
            private int RecipientNum = 0;
            /// <summary> 
            /// 最多收件人數量 
            /// </summary> 
            private int recipientmaxnum = 1;
            /// <summary> 
            /// 密件收件人數量 
            /// </summary> 
            private string cc;
            //private int RecipientBCCNum=0; 
            /// <summary> 
            /// 錯誤消息反饋 
            /// </summary> 
            private string errmsg;
            /// <summary> 
            /// TcpClient對象，用于連接服務器 
            /// </summary>    
            private TcpClient tc;
            /// <summary> 
            /// NetworkStream對象 
            /// </summary>    
            private NetworkStream ns;
            /// <summary> 
            /// SMTP錯誤代碼哈希表 
            /// </summary> 
            private Hashtable ErrCodeHT = new Hashtable();
            /// <summary> 
            /// SMTP正確代碼哈希表 
            /// </summary> 
            private Hashtable RightCodeHT = new Hashtable();
            public ESmtpMail()
            {
                Attachments = new System.Collections.ArrayList();
            }
            /// <summary> 
            /// 郵件服務器域名和驗證信息 
            /// 形如："user:paswww.server.com:25"，也可省略次要信息。如"user:paswww.server.com"www.server.com" 
            /// </summary>    
            public string MailDomain
            {
                set
                {
                    mailserver = value;
                }
            }

            /// <summary> 
            /// 郵件服務器端口號 
            /// </summary>    
            public int MailDomainPort
            {
                set
                {
                    mailserverport = value;
                }
            }

            /// <summary> 
            /// SMTP認證時使用的用戶名 
            /// </summary> 
            public string MailServerUserName
            {
                set
                {
                    if (value.Trim() != "")
                    {
                        username = value.Trim();
                        ESmtp = true;
                    }
                    else
                    {
                        username = "";
                        ESmtp = false;
                    }
                }
            }
            /// <summary> 
            /// SMTP認證時使用的密碼 
            /// </summary> 
            public string MailServerPassWord
            {
                set
                {
                    password = value;
                }
            }
            /// <summary> 
            /// 郵件發送優先級，可設置為"High","Normal","Low"或"1","3","5" 
            /// </summary> 
            public string Priority
            {
                set
                {
                    switch (value.ToLower())
                    {
                        case "high":
                            priority = "High";
                            break;
                        case "1":
                            priority = "High";
                            break;
                        case "normal":
                            priority = "Normal";
                            break;
                        case "3":
                            priority = "Normal";
                            break;
                        case "low":
                            priority = "Low";
                            break;
                        case "5":
                            priority = "Low";
                            break;
                        default:
                            priority = "Normal";
                            break;
                    }
                }
            }

            /// <summary> 
            /// 錯誤消息反饋 
            /// </summary>       
            public string ErrorMessage
            {
                get
                {
                    return errmsg;
                }
            }

            /// <summary> 
            /// 服務器交互記錄 
            /// </summary> 
            private string logs = "";
            /// <summary> 
            /// 服務器交互記錄，如發現本組件不能使用的SMTP服務器，請將出錯時的Logs發給我（lion-a@sohu.com），我將盡快查明原因。 
            /// </summary> 
            public string Logs
            {
                get
                {
                    return logs;
                }
            }


            /// <summary> 
            /// SMTP回應代碼哈希表 
            /// </summary> 
            private void SMTPCodeAdd()
            {
                ErrCodeHT.Add("500", "郵箱地址錯誤");
                ErrCodeHT.Add("501", "參數格式錯誤");
                ErrCodeHT.Add("502", "命令不可實現");
                ErrCodeHT.Add("503", "服務器需要SMTP驗證");
                ErrCodeHT.Add("504", "命令參數不可實現");
                ErrCodeHT.Add("421", "服務未就緒，關閉傳輸信道");
                ErrCodeHT.Add("450", "要求的郵件操作未完成，郵箱不可用（例如，郵箱忙）");
                ErrCodeHT.Add("550", "要求的郵件操作未完成，郵箱不可用（例如，郵箱未找到，或不可訪問）");
                ErrCodeHT.Add("451", "放棄要求的操作；處理過程中出錯");
                ErrCodeHT.Add("551", "用戶非本地，請嘗試<forward-path>");
                ErrCodeHT.Add("452", "系統存儲不足，要求的操作未執行");
                ErrCodeHT.Add("552", "過量的存儲分配，要求的操作未執行");
                ErrCodeHT.Add("553", "郵箱名不可用，要求的操作未執行（例如郵箱格式錯誤）");
                ErrCodeHT.Add("432", "需要一個密碼轉換");
                ErrCodeHT.Add("534", "認證機制過于簡單");
                ErrCodeHT.Add("538", "當前請求的認證機制需要加密");
                ErrCodeHT.Add("454", "臨時認證失敗");
                ErrCodeHT.Add("530", "需要認證");
                RightCodeHT.Add("220", "服務就緒");
                RightCodeHT.Add("250", "要求的郵件操作完成");
                RightCodeHT.Add("251", "用戶非本地，將轉發向<forward-path>");
                RightCodeHT.Add("354", "開始郵件輸入，以<enter>.<enter>結束");
                RightCodeHT.Add("221", "服務關閉傳輸信道");
                RightCodeHT.Add("334", "服務器響應驗證Base64字符串");
                RightCodeHT.Add("235", "驗證成功");
            }

            /// <summary> 
            /// 將字符串編碼為Base64字符串 
            /// </summary> 
            /// <param name="estr">要編碼的字符串</param> 
            private string Base64Encode(string str)
            {
                byte[] barray;
                barray = Encoding.Default.GetBytes(str);
                return Convert.ToBase64String(barray);
            }

            /// <summary> 
            /// 將Base64字符串解碼為普通字符串 
            /// </summary> 
            /// <param name="dstr">要解碼的字符串</param> 
            private string Base64Decode(string str)
            {
                byte[] barray;
                barray = Convert.FromBase64String(str);
                return Encoding.Default.GetString(barray, 0, barray.Length);
            }
            /// <summary> 
            /// 得到上傳附件的文件流 
            /// </summary> 
            /// <param name="FilePath">附件的絕對路徑</param> 
            private string GetStream(string FilePath)
            {
                //建立文件流對象 
                System.IO.FileStream FileStr = new System.IO.FileStream(FilePath, System.IO.FileMode.Open);
                byte[] by = new byte[System.Convert.ToInt32(FileStr.Length)];
                FileStr.Read(by, 0, by.Length);
                FileStr.Close();
                return (System.Convert.ToBase64String(by));
            }

            /// <summary> 
            /// 添加郵件附件 
            /// </summary> 
            /// <param name="path">附件絕對路徑</param> 
            public void AddAttachment(string path)
            {
                Attachments.Add(path);
            }


            /// <summary> 
            /// 添加一個收件人 
            /// </summary>    
            /// <param name="str">收件人地址</param> 
            public bool AddRecipient(string str)
            {
                str = str.Trim();
                if (str == null || str == "" || str.IndexOf("@") == -1)
                    return true;
                if (RecipientNum < recipientmaxnum)
                {
                    Recipient.Add(RecipientNum, str);
                    RecipientNum++;
                    return true;
                }
                else
                {
                    errmsg += "收件人過多";
                    return false;
                }
            }

            /// <summary> 
            /// 最多收件人數量 
            /// </summary> 
            public int RecipientMaxNum
            {
                set
                {
                    recipientmaxnum = value;
                }