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  • 调用SMTP发送有附件的邮件

    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;
    using System.Net;
    using System.Net.Mail;
    using System.Text.RegularExpressions;
    
    public class EmailUtils
    {
            #region  验证输入为Email
            /// <summary>
            /// 验证输入为Email
            /// </summary>
            /// <param name="str"></param>
            /// <returns></returns>
            public static bool validateEmail(string str)
            {
                return Regex.IsMatch(str, @"w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*");
            }
            #endregion
    
            public static void SendEmail(string txtSend,string txtTo)
            {
                try
                {
                    if (validateEmail(txtSend))
                    {
                        //设置邮件发送人和接收人
                        MailMessage message = null;
                        if (txtTo.IndexOf(",") != -1)
                        {
                            string[] strEmail = txtTo.Split(',');
                            string sumEmail = "";
                            for (int i = 0; i < strEmail.Length; i++)
                            {
                                sumEmail = strEmail[i];
                                message = new MailMessage(new MailAddress(txtSend), new MailAddress(sumEmail));
                                SendEmail(message);
                            }
                        }
                        else
                        {
                            message = new MailMessage(new MailAddress(txtSend), new MailAddress(txtTo));
                            SendEmail(message);
                        }
                        Log("发送成功");
                    }
                }
                catch
                {
                    Log("发送失败!");
                }
            }
    
            private void SendEmail(MailMessage message)
            {
                message.Subject = Base64Encode("testSubject");    //设置发送邮件的主题
                message.Body = Base64Encode("testContent");       //设置发送邮件的内容
                if (txtAttachment!= "")
                {
                    if (txtAttachment.IndexOf(",") != 0)
                    {
                        string[] strAttachment = txtAttachment.Split(',');
                        for (int i = 0; i < strAttachment.Length; i++)
                        {
                            AddFile(strAttachment[i], message);
                        }
                    }
                    else
                    {
                        AddFile(txtAttachment, message);
                    }
                }
                //实例化SmtpClient邮件发送类对象
                SmtpClient client = new SmtpClient(Dns.GetHostName(), Convert.ToInt32("25"));
                //设置用于验证发件人身份的凭据
                client.Credentials = new System.Net.NetworkCredential("MyTest", "*****");
                //发送邮件
                client.Send(message);
            }
    
            //对邮件内容进行编码
            private static string Base64Encode(string str)
            {
                return Convert.ToBase64String(Encoding.UTF8.GetBytes(str));
            }
    
            private void AddFile(string strFile,MailMessage message)
            {
                //为要发送的邮件创建附件信息
                Attachment myAttachment = new Attachment(strFile, System.Net.Mime.MediaTypeNames.Application.Octet);
                //为附件添加时间信息
                System.Net.Mime.ContentDisposition disposition = myAttachment.ContentDisposition;
                disposition.CreationDate = System.IO.File.GetCreationTime(strFile);
                disposition.ModificationDate = System.IO.File.GetLastWriteTime(strFile);
                disposition.ReadDate = System.IO.File.GetLastAccessTime(strFile);
                message.Attachments.Add(myAttachment);			//将创建的附件添加到邮件中
            }
    }
    
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  • 原文地址:https://www.cnblogs.com/ziranquliu/p/4690756.html
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