C#使用GMAIL群发带附件邮件的例子

 

说明：

 

做一个要群发邮件的Excel表，包含：

 

ID，

姓名，

邮箱

 

三列，多个邮箱间用“;”间隔开。

 

对于不同附件的文件名必须包含ID。 

using System;using System.Data;using System.Windows.Forms;using System.Data.OleDb;using System.Net.Mail;using System.Net;using System.IO;namespace Ferry{ public partial class MassSendMail : Form { public MassSendMail() { InitializeComponent(); } private void MassSendMail_Load(object sender, EventArgs e) { } /// <summary> /// 统一的附件 /// </summary> private void btnSameAttach_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "所有文件|*.*"; ofd.ShowDialog(); txtSameAttach.Text = ofd.FileName; } /// <summary> /// 不同的附件，必须放在相同目录 /// </summary> private void btnDiffAttach_Click(object sender, EventArgs e) { FolderBrowserDialog fbd = new FolderBrowserDialog(); fbd.ShowDialog(); txtDiffAttach.Text = fbd.SelectedPath; } private void btnMassSendList_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "Excel文件(*.xlsx;*.xls)|*.xlsx;*.xls"; ofd.ShowDialog(); txtMassSendList.Text = ofd.FileName; } private void MassSendMail_FormClosing(object sender, FormClosingEventArgs e) { if (MessageBox.Show("确定要退出吗？退出将丢失窗口中所有信息！", "警告", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.No) { e.Cancel = true; } } private void btnQuit_Click(object sender, EventArgs e) { this.Close(); } private void btnSend_Click(object sender, EventArgs e) { SendMail(); } private void SendMail() { this.btnSend.Enabled = false; #region 读取设置的信息 //邮件主题 String strMailSubject = txtMailSubject.Text.Trim(); //邮件内容 String strMailBody = txtMailBody.Text.Trim(); //统一附件文件目录 String strSameFilePath = txtSameAttach.Text.Trim(); //不同附件目录 String strDiffFoderPath = txtDiffAttach.Text.Trim(); //群发列表文件路径 String strMassSendList = txtMassSendList.Text.Trim(); //邮箱 String strMail = txtYourMail.Text.Trim(); //邮箱密码 String strPassword = txtYourMailPassword.Text.Trim(); //显示姓名 String strDisplayName = txtDisplayName.Text.Trim(); #endregion #region 验证必填信息 if (strMailSubject.Length == 0) { MessageBox.Show("请输入邮件主题！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); this.btnSend.Enabled = true; return; } if (strMailBody.Length == 0) { MessageBox.Show("请输入邮件内容！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); this.btnSend.Enabled = true; return; } if (strMassSendList.Length == 0) { MessageBox.Show("请选择群发邮件列表Excel文件！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); this.btnSend.Enabled = true; return; } if (strMail.Length == 0) { MessageBox.Show("请输入邮箱！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); this.btnSend.Enabled = true; return; } if (strPassword.Length == 0) { MessageBox.Show("请输入邮箱密码！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); this.btnSend.Enabled = true; return; } #endregion #region 读取群发邮件列表 string connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 12.0;Persist Security Info=False", strMassSendList); OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM [MailList$]", connectionString); DataTable dt = new DataTable(); try { da.Fill(dt); } catch (Exception err) { MessageBox.Show("从Excel中获取数据失败：" + err.Message); return; } DataRow[] emptyRows = dt.Select("ID = '' OR ID IS NULL OR ID = 'ID'"); foreach (DataRow row in emptyRows) { dt.Rows.Remove(row); } dt.AcceptChanges(); dt.PrimaryKey = new DataColumn[] { dt.Columns["ID"] }; #endregion foreach (DataRow dr in dt.Rows) { MailMessage mess = new MailMessage(); if (strDisplayName.Length != 0) { mess.From = new MailAddress(strDisplayName + "<" + strMail + ">"); } else { mess.From = new MailAddress(strMail); } #region 设置邮件 mess.Subject = strMailSubject.Replace("{Name}", dr["姓名"].ToString()); mess.Body = strMailBody.Replace("{Name}", dr["姓名"].ToString()); mess.IsBodyHtml = true; String[] strMailAddr = dr["邮箱"].ToString().Trim().Split(';'); for (Int32 i = 0; i < strMailAddr.Length; i++) { if (strMailAddr[i].Trim().Length != 0) { mess.To.Add(strMailAddr[i]); } } #endregion #region 添加附件 if (strSameFilePath.Length != 0) { mess.Attachments.Add(new Attachment(strSameFilePath)); } if (strDiffFoderPath.Length != 0) { String[] files = Directory.GetFiles(strDiffFoderPath); for (Int32 j = 0; j < files.Length; j++) { if (files[j].ToUpper().Trim().IndexOf(dr["ID"].ToString().Trim().ToUpper()) > 0) { mess.Attachments.Add(new Attachment(files[j])); } } } #endregion #region SmtpClient sc = new SmtpClient(); sc.Host = "smtp.gmail.com"; sc.Port = 587; sc.Credentials = new NetworkCredential(strMail + "@gmail.com", strPassword); sc.DeliveryMethod = SmtpDeliveryMethod.Network; sc.EnableSsl = true; try { sc.Send(mess); this.txtSendMessage.Text += dr["姓名"].ToString() + "......成功/r/n"; } catch { this.txtSendMessage.Text += dr["姓名"].ToString() + "......失败/r/n"; } #endregion } this.btnSend.Enabled = true; MessageBox.Show("邮件群发已完成！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } private void menuQuit_Click(object sender, EventArgs e) { this.Close(); } private void menuSaveMessage_Click(object sender, EventArgs e) { SaveFileDialog sfd = new SaveFileDialog(); sfd.Filter = "文本文件(*.txt)|*.txt"; DialogResult r = sfd.ShowDialog(); String filePath = sfd.FileName.Trim(); if (r != DialogResult.Cancel) { FileStream fs; if (File.Exists(filePath)) { fs = File.Open(filePath, FileMode.Append); } else { fs = File.Open(filePath, FileMode.Create); } StreamWriter sw = new StreamWriter(fs); sw.Write(this.txtSendMessage.Text); sw.Close(); fs.Close(); GC.Collect(); MessageBox.Show("发送记录已保存！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); } } private void menuHelp_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start("邮件群发工具使用说明.docx"); } private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e) { if (this.WindowState != FormWindowState.Minimized) { this.WindowState = FormWindowState.Minimized; this.ShowInTaskbar = false; } else { this.WindowState = FormWindowState.Normal; this.ShowInTaskbar = true; } } private void contextMenuQuit_Click(object sender, EventArgs e) { this.Close(); } }}