C# 发送邮件 例子源码下载

【实例截图】

【核心代码】

using System;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace Mail
{
    public partial class MainForm : Form
    {
        private CEmail myMail = new CEmail();

        public MainForm()
        {
            InitializeComponent();
           
        }

        /// <summary>
        /// 添加附件
        /// </summary>
        private void btnOpenFile_Click(object sender, EventArgs e)
        {
            openFile.FileName = "";
            openFile.ShowDialog();
            txtFile.Text = openFile.FileName;    
        }
        /// <summary>
        /// 检验用户填写是否正确
        /// </summary>
        /// <returns></returns>
        private bool CheckValue()
        {
            if (txtFrom.Text == "" || txtTheme.Text == "" || txtTo.Text == "" || txtPwd.Text == "")
            {
                toolStripStatusLabel1.Text ="请填写完整信息";
                return false;
            }

            if (!Regex.IsMatch(txtTo.Text, @"^([\w-\.] )@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-] \.) ))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"))
            {
                toolStripStatusLabel1.Text = "收件人的地址格式不正确";
                return false;
            }

            if (!Regex.IsMatch(txtFrom.Text,@"^([\w-\.] )@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-] \.) ))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"))
            {
                toolStripStatusLabel1.Text = "发件人的地址格式不正确";
                return false;
            }

            return true;
        }

       /// <summary>
        /// 点击发送
       /// </summary>
        private void btnSend_Click(object sender, EventArgs e)
        {
            if (CheckValue())
            {
                this.Enabled = false;
                toolStripStatusLabel1.Text = "正在发送...请稍等";


                myMail.SetEmail(txtFrom.Text, 
                                txtPwd.Text,
                                txtTo.Text,
                                string.IsNullOrEmpty(txtNickname.Text) ? txtFrom.Text : txtNickname.Text,
                                txtFile.Text, 
                                txtContent.Text, 
                                txtTheme.Text);
                
                if (myMail.SendMail())
                {
                    toolStripStatusLabel1.Text = "发送成功";          
                }
                else
                {
                    toolStripStatusLabel1.Text = "发送失败";
                    btnReportView.Enabled = true;
                }
                this.Enabled = true;
                btnSend.Enabled = false;       
            }
        }

        //清空
        private void Clear()
        {
            txtFile.Text = "";
            txtFrom.Text = "";
            txtNickname.Text = "";
            txtTheme.Text = "";
            txtTo.Text = "";
            txtContent.Text = "";
            txtPwd.Text = "";
        }
        //再发一封
        private void btnReWrite_Click(object sender, EventArgs e)
        {
            toolStripStatusLabel1.Text = "就绪";
            btnSend.Enabled = true;
            btnReportView.Enabled = false;
            Clear();
        }
        //查看错误报告
        private void btnReportView_Click(object sender, EventArgs e)
        {   
            MessageBox.Show(myMail.Exception);
        }
         //清空附件
        private void btnCancel_Click(object sender, EventArgs e)
        {
            txtFile.Text = "";
        }
        //帮助
        private void btnHelp_Click(object sender, EventArgs e)
        {
            MessageBox.Show("发不出去邮件怎么办?\n"
                 "1.首先要确保您的邮箱提供smtp服务,并且您已经开通此服务（例如163邮箱是在2006年11月16日之后注册的邮箱不给提供smtp服务）\n"
                 "2.有些邮箱的smtp服务器命名与其邮箱地址不符,此类邮箱暂时不能发送\n"
                 "3.经过本人测试,163,126,qq的邮箱可以使用");
        }
    }
}