C# 利用Jmail 实现邮件收发（可带附件）

1   首先需要引用 jmail.dll


下面是 发送邮件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace winMail
{
    public partial class Send : Form
    {
        public Send()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 发送邮件
        /// </summary>
        public bool Sendmsg()
        {
            jmail.Message Jmail = new jmail.Message();          //创建一个jmail对象   
            Jmail.Silent = true;                                //安静的发送邮件
            Jmail.Charset = "GB2312";                           //设置发送邮件的字符集
            //Jmail.ContentType = "text/html";
            string[] To = txtToEmial.Text.ToString().Split(‘,‘);
            for (int i = 0; i < To.Count(); i++)
            {
                Jmail.AddRecipient(To[i]);   //添加发送的邮件 
            }
            Jmail.From = txtUname.Text;                             //从何处发送
            Jmail.MailServerUserName = txtUname.Text;               //发件人姓名
            Jmail.MailServerPassWord = txtPwd.Text;             //发件邮件的密码
            Jmail.Subject = txtTitle.Text; 
            if (!string.IsNullOrEmpty(txtFile.Text.Trim()))
            {
                Jmail.AddAttachment(txtFile.Text, true, null);    //添加附件
            }
            Jmail.Body = txtContens.Text;                                  //添加发送邮件的内容
            //Jmail.DeferredDelivery = new DateTime(2012, 9, 11,18,0,0);        //设置发送邮件的延迟时间 //这个163不行
            bool State= Jmail.Send(txtStmpServer.Text, false);                  //发送邮件的服务器
            Jmail.Close();
            return State;
        }
        private void btnSend_Click(object sender, EventArgs e)
        {
            if (Sendmsg())
            {
                MessageBox.Show("发送成功");
                this.Close();
            }
            else
            {
                MessageBox.Show("发送失败");
            }
        }

        /// <summary>
        /// 选择附件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOpenFile_Click(object sender, EventArgs e)
        {
           OpenFileDialog file = new OpenFileDialog();
           DialogResult rst=file.ShowDialog();
           txtFile.Text = file.FileName;
        }
     
      
    }
}


 下面是收件 ：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace winMail
{
    public partial class index : Form
    {
      
        public index()
        {
            InitializeComponent();//用来初始化窗口         
        }
        /// <summary>
        /// 获取用户帐号密码
        /// </summary>
        /// <returns></returns>
        public DataSet GetUser()
        {
            DataSet ds = new DataSet();
            ds = new GetData().GetUser("");
            return ds;          
        } 
        /// <summary>
        /// 获取邮件
        /// </summary>
        public void GetMail()
        {
            //建立收邮件对象
            //jmail.POP3Class popMail =new jmail.POP3Class ();
            //  jmail.POP3 pop = new jmail.POP3();//用 POP3Class  感觉和pop3没什么不同
            ///建立邮件信息接口
            jmail.Message mailMessage;
            ///建立附件集接口
            jmail.Attachments atts;
            ///建立附件接口
            jmail.Attachment att;
            DataTable User = new DataTable();
            User = GetUser().Tables[0];
            for (int n = 0; n < User.Rows.Count; n++)
            {
                jmail.POP3 pop = new jmail.POP3();//用 POP3Class  感觉和pop3没什么不同
                string EmailAddress = User.Rows[n]["UserName"].ToString();//用户邮件用户名
                string Emailpwd = User.Rows[n]["PassWord"].ToString();//密码
                int Uid = Convert.ToInt32(User.Rows[n]["Uid"].ToString());//用户id
                DateTime Todate = Convert.ToDateTime(new GetData().GetUserMax(Uid));//数据库中自己邮件接收最后的时间
                try
                {
                    pop.Connect(EmailAddress, Emailpwd, txtPopServer.Text, Convert.ToInt32(txtPopport.Text));
                    ///如果收到邮件
                    if (0 < pop.Count)
                    {
                        //根据取到的邮件数量依次取得每封邮件（倒序）
                        for (int i = pop.Count; i > 0; i--)
                        {
                            //取得一条邮件信息
                            // mailMessage = popMail.Messages[i];
                            mailMessage = pop.Messages[i];
                            ///取得该邮件的附件集合
                            atts = mailMessage.Attachments;
                            ///设置邮件的编码方式                         
                            mailMessage.Charset = "GB2312";
                            ///设置邮件的附件编码方式                        
                            mailMessage.Encoding = "Base64";
                            ///是否将信头编码成iso-8859-1字符集                       
                            mailMessage.ISOEncodeHeaders = false;
                            TimeSpan span = mailMessage.Date - Todate;//判断邮件的时间是不是大于自己数据库邮件时间最大的值
                            if (span.Days > 1 || span.Hours > 0 || span.Minutes > 0 || span.Seconds > 0) 
                            {
                                ///插入到数据库 得到刚刚插入数据中的id
                                int id = new GetData().Insert(mailMessage.Subject, mailMessage.From, mailMessage.FromName, mailMessage.HTMLBody, mailMessage.Date, Uid);
                                for (int j = 0; j < atts.Count; j++)//循环取附件
                                {
                                    //取得附件
                                    att = atts[j];
                                    //附件名称                             
                                    string attname = att.Name;
                                    //上传到服务器
                                    string Path =Application.StartupPath+@"\File\"+DateTime.Now.ToString("yyyyMMddHHssss") + new Random().Next(100000000) + attname;
                                    att.SaveToFile(Path);//附件保存地址
                                    string SavaPath =Path;//数据库字段需要保存的值
                                    new GetData().InsertFj(id, SavaPath);//插入附件
                                }
                            }
                            else
                            {
                                break;
                            }
                        }
                        att = null;
                        atts = null;
                    }               
                    pop.Disconnect();//关闭
                    pop = null;
                }
                catch
                {
                    MessageBox.Show("警告：用户:" + EmailAddress + "登录失败！");
                    timer1.Enabled = false;
                 
                }
            }
        }
        /// <summary>
        /// 在任务栏显示
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            this.Visible = true;
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.WindowState = FormWindowState.Normal;
            }
            else
            {
                this.WindowState = FormWindowState.Minimized;
            }
        }
        /// <summary>
        /// 在任务栏显示
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void index_SizeChanged(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.Hide();
            }
        }
        /// <summary>
        /// 绑定所有邮件
        /// </summary>
        public void BindAllMail()
        {
            DataSet ds = new DataSet();
            StringBuilder sql = new StringBuilder();
            if (!string.IsNullOrEmpty(txtTitle.Text.Trim()))
            {
                sql.Append(" subject like ‘%" + txtTitle.Text.Trim() + "%‘");
            }
            ds = new GetData().GetMail(sql.ToString());
            DataShow.DataSource = ds.Tables[0]; 
         
        }
        /// <summary>
        /// 窗体加载事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void index_Load(object sender, EventArgs e)
        {
            skinEngine1.SkinFile = Application.StartupPath + @"\skin\GlassBrown.ssk";
            GetMail();
            BindAllMail();
        
        
        }
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 发送邮件ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Send send = new Send();
            send.ShowDialog();
        }
        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            DialogResult result = MessageBox.Show("确定推出应用程序", "提示窗", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (result == DialogResult.Yes)
            {
                this.Close();
                Application.Exit();
            }
            else
            {
             
                Thread New_Messages = new Thread(new ThreadStart(Messages_Show));//创建控制线程
                New_Messages.Start();//开始
               
            }
        }
        /// <summary>
        /// 显示消息
        /// </summary>
        public void Messages_Show()
        {           
        }  
        /// <summary>
        ///定时获取
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer1_Tick(object sender, EventArgs e)
        {
            GetMail();
            BindAllMail();
        }
   
 
 
    
    }
}