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.Net.Mail;
using System.Net;

namespace mailTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MailMessage msg = new MailMessage();
            msg.Body = this.textBox3.Text;
            msg.From = new MailAddress(*****@163.com); //   傳送的郵件地址（主機）
            //msg.Sender = new MailAddress("");
            msg.To.Add("

            SmtpClient sc = new SmtpClient();
            sc.Host = "smtp.163.com";                 //這個不一定是163，看你的主機的郵箱型號，還可以是smtp.qq.com, smtp.126.com , smtp.yahoo.com 等等
            sc.Port = 25;
            NetworkCredential nc = new NetworkCredential();
            nc.UserName = "******";       //主機的郵箱名稱
            nc.Password = "********";     //主機的郵箱密碼
            sc.Credentials = nc;

            Attachment att = new Attachment(this.textBox4.Text);
            msg.Attachments.Add(att);
            sc.Send(msg);
            MessageBox.Show("傳送成功！");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (this.openFileDialog1.ShowDialog() ==System.Windows.Forms.DialogResult.OK)
            {
                this.textBox4.Text = this.openFileDialog1.FileName;           //上傳附件，開啟對話方塊，得到客戶端的檔案
            }
        }
    }
}