C# 邮件发送代码,CSharp代码库,德仔网

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【CSharp】 C# 邮件发送
作者:Dezai.CN / 发布于2011/12/6/ 617
<div><span style="color: rgb(0,0,255)">using</span> System; 
<span style="color: rgb(0,0,255)">using</span> System.Collections.Generic; 
<span style="color: rgb(0,0,255)">using</span> System.ComponentModel; 
<span style="color: rgb(0,0,255)">using</span> System.Data; 
<span style="color: rgb(0,0,255)">using</span> System.Drawing; 
<span style="color: rgb(0,0,255)">using</span> System.Text; 
<span style="color: rgb(0,0,255)">using</span> System.Windows.Forms; 
<span style="color: rgb(0,0,255)">using</span> System.Net; 
<span style="color: rgb(0,0,255)">using</span> System.Net.Mail; 
<span style="color: rgb(0,0,255)">using</span> System.Net.Mime; 
<span style="color: rgb(0,0,255)">using</span> System.IO; 
 
<span style="color: rgb(0,0,255)">namespace</span> SendMailExample 
{ 
 <span style="color: rgb(128,128,128)">///</span> <span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)"> 
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 作者：Andrew 
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> Blog: </span><span style="color: rgb(0,128,0); text-decoration: underline">http://blog.csdn.net/Andrew_wx</span><span style="color: rgb(0,128,0)"> 
 </span><span style="color: rgb(128,128,128)">///</span> <span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(128,128,128)">
</span> <span style="color: rgb(0,0,255)">public</span> <span style="color: rgb(0,0,255)">partial</span> <span style="color: rgb(0,0,255)">class</span> FormSendMail : Form 
 { 
 <span style="color: rgb(0,0,255)">public</span> FormSendMail() 
 { 
 InitializeComponent(); 
 } 
 
 <span style="color: rgb(0,0,255)">private</span> <span style="color: rgb(0,0,255)">void</span> FormSendMail_Load(<span style="color: rgb(0,0,255)">object</span> sender, EventArgs e) 
 { 
 txtSmtpServer.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">smtp.qq.com</span><span style="color: rgb(128,0,0)">"</span>; 
 txtSend.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">heuandmei@qq.com</span><span style="color: rgb(128,0,0)">"</span>; 
 txtDisplayName.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">Andrew(王旭)</span><span style="color: rgb(128,0,0)">"</span>; 
 txtPassword.Text = <span style="color: rgb(128,0,0)">""</span>;<span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">密码 </span><span style="color: rgb(0,128,0)">
</span> txtReceive.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">heuandmei@qq.com</span><span style="color: rgb(128,0,0)">"</span>; 
 txtTitle.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">发信测试</span><span style="color: rgb(128,0,0)">"</span>; 
 txtBody.Text = <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">This is a test(测试)</span><span style="color: rgb(128,0,0)">"</span>; 
 rbtnNoSSL.Checked = <span style="color: rgb(0,0,255)">true</span>; 
 } 
 
 <span style="color: rgb(0,0,255)">private</span> <span style="color: rgb(0,0,255)">void</span> btnAddFiles_Click(<span style="color: rgb(0,0,255)">object</span> sender, EventArgs e) 
 { 
 OpenFileDialog odlg = <span style="color: rgb(0,0,255)">new</span> OpenFileDialog(); 
 odlg.CheckFileExists = <span style="color: rgb(0,0,255)">true</span>; 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">只接收有效的文件名 </span><span style="color: rgb(0,128,0)">
</span> odlg.ValidateNames = <span style="color: rgb(0,0,255)">true</span>; 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">允许一次选择多个文件作为附件 </span><span style="color: rgb(0,128,0)">
</span> odlg.Multiselect = <span style="color: rgb(0,0,255)">true</span>; 
 <span style="color: rgb(0,0,255)">if</span> (odlg.ShowDialog() == System.Windows.Forms.DialogResult.OK) 
 { 
 lstFiles.Items.AddRange(odlg.FileNames); 
 } 
 
 } 
 
 <span style="color: rgb(0,0,255)">private</span> <span style="color: rgb(0,0,255)">void</span> btnSend_Click(<span style="color: rgb(0,0,255)">object</span> sender, EventArgs e) 
 { 
 <span style="color: rgb(0,0,255)">this</span>.Cursor = Cursors.WaitCursor; 
 MailMessage mail = <span style="color: rgb(0,0,255)">new</span> MailMessage(); 
 mail.From = <span style="color: rgb(0,0,255)">new</span> MailAddress( 
 txtSend.Text, txtDisplayName.Text, Encoding.UTF8); 
 mail.To.Add(txtReceive.Text); 
 mail.Subject = txtTitle.Text; 
 mail.SubjectEncoding = Encoding.Default; 
 mail.Body = txtBody.Text; 
 mail.BodyEncoding = Encoding.Default; 
 mail.IsBodyHtml = <span style="color: rgb(0,0,255)">false</span>; 
 mail.Priority = MailPriority.Normal; 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">添加附件 </span><span style="color: rgb(0,128,0)">
</span> Attachment attachment = <span style="color: rgb(0,0,255)">null</span>; 
 <span style="color: rgb(0,0,255)">if</span> (lstFiles.Items.Count > <span style="color: rgb(128,0,128)">0</span>) 
 { 
 <span style="color: rgb(0,0,255)">for</span> (<span style="color: rgb(0,0,255)">int</span> i = <span style="color: rgb(128,0,128)">0</span>; i < lstFiles.Items.Count; i++) 
 { 
 <span style="color: rgb(0,0,255)">string</span> pathFileName = lstFiles.Items[i].ToString(); 
 <span style="color: rgb(0,0,255)">string</span> extName = Path.GetExtension(pathFileName).ToLower(); 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">判断附件类型 </span><span style="color: rgb(0,128,0)">
</span> <span style="color: rgb(0,0,255)">if</span> (extName == <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">.rar</span><span style="color: rgb(128,0,0)">"</span> || extName == <span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">.zip</span><span style="color: rgb(128,0,0)">"</span>) 
 { 
 attachment = <span style="color: rgb(0,0,255)">new</span> Attachment(pathFileName, MediaTypeNames.Application.Zip); 
 } 
 <span style="color: rgb(0,0,255)">else</span> 
 { 
 attachment = <span style="color: rgb(0,0,255)">new</span> Attachment(pathFileName, MediaTypeNames.Application.Octet); 
 } 
 ContentDisposition cd = attachment.ContentDisposition; 
 cd.CreationDate = File.GetCreationTime(pathFileName); 
 cd.ModificationDate = File.GetLastWriteTime(pathFileName); 
 cd.ReadDate = File.GetLastAccessTime(pathFileName); 
 mail.Attachments.Add(attachment); 
 
 } 
 } 
 SmtpClient client = <span style="color: rgb(0,0,255)">new</span> SmtpClient(); 
 client.Host = txtSmtpServer.Text; 
 client.Port = <span style="color: rgb(128,0,128)">25</span>; 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">是否使用安全套接字层加密连接 </span><span style="color: rgb(0,128,0)">
</span> client.EnableSsl = rbtnUseSSL.Checked; 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">不使用默认凭证，注意此句必须放在 client.Credentials 的上面 </span><span style="color: rgb(0,128,0)">
</span> client.UseDefaultCredentials = <span style="color: rgb(0,0,255)">false</span>; 
 client.Credentials = <span style="color: rgb(0,0,255)">new</span> NetworkCredential(txtSend.Text, txtPassword.Text); 
 <span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">邮件通过网络直接发送到服务器 </span><span style="color: rgb(0,128,0)">
</span> client.DeliveryMethod = SmtpDeliveryMethod.Network; 
 <span style="color: rgb(0,0,255)">try</span> 
 { 
 client.Send(mail); 
 MessageBox.Show(<span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">发送成功</span><span style="color: rgb(128,0,0)">"</span>); 
 } 
 <span style="color: rgb(0,0,255)">catch</span> (SmtpException ex) 
 { 
 MessageBox.Show(<span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">发送失败：</span><span style="color: rgb(128,0,0)">"</span> + ex.Message); 
 } 
 <span style="color: rgb(0,0,255)">catch</span> (Exception ex) 
 { 
 MessageBox.Show(<span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">发送失败：</span><span style="color: rgb(128,0,0)">"</span> + ex.Message); 
 } 
 <span style="color: rgb(0,0,255)">finally</span> 
 { 
 mail.Dispose(); 
 client = <span style="color: rgb(0,0,255)">null</span>; 
 <span style="color: rgb(0,0,255)">this</span>.Cursor = Cursors.Default; 
 } 
 } 
 } 
}
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