C#实现发送邮件——核心部分代码

       在KS系统中有个发送邮件的功能需要做上网查阅资料以后&＃xff0c;通过自己的部分修改实现了发送邮件的功能话不多说先来个界面&＃xff1a;

 

邮件发送分一下步骤&＃xff1a;

1.smtp服务信息设置

2.验证发件人信息

3.添加附件

4.正式发送邮件

5.发送邮件后处理

 

1.smtp服务信息设置

#region 设置&＃xff33;mtp服务器信息///

/// 设置&＃xff33;mtp服务器信息///

/// SMTP服务名/// 端口号private void setSmtpClient(string ServerHost, int Port){SmtpClient &＃61; new SmtpClient();SmtpClient.Host &＃61; ServerHost;//指定SMTP服务名 例如QQ邮箱为 smtp.qq.com 新浪cn邮箱为 smtp.sina.cn等SmtpClient.Port &＃61; Port; //指定端口号SmtpClient.Timeout &＃61; 0; //超时时间}#endregion

 

2.验证发件人信息

#region 验证发件人信息///

/// 验证发件人信息///

/// 发件邮箱地址/// 邮箱密码private void setAddressform(string MailAddress, string MailPwd){//创建服务器认证NetworkCredential NetworkCredential_my &＃61; new NetworkCredential(MailAddress, MailPwd);//实例化发件人地址MailAddress_from &＃61; new System.Net.Mail.MailAddress(MailAddress, textBoxX4.Text);//指定发件人信息 包括邮箱地址和邮箱密码SmtpClient.Credentials &＃61; new System.Net.NetworkCredential(MailAddress_from.Address, MailPwd);;}#endregion

 

3.添加附件

#region 检测附件大小private bool Attachment_MaiInit(string path){try{FileStream_my &＃61; new FileStream(path, FileMode.Open);string name &＃61; FileStream_my.Name;int size &＃61; (int)(FileStream_my.Length / 1024 / 1024);FileStream_my.Close();//控制文件大小不大于10&＃xff2d;if (size > 10){MessageBox.Show("文件长度不能大于10M&＃xff01;你选择的文件大小为" &＃43; size.ToString() &＃43; "M", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);return false;}return true;}catch (IOException E){MessageBox.Show(E.Message);return false;}}#endregion

 

4.正式发送邮件

private void btnSend_Click_1(object sender, EventArgs e){if (txt_SmtpServer.Text &＃61;&＃61; ""){MessageBox.Show("请输入SMTP服务器名&＃xff01;", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);return;}if (textBoxX2.Text &＃61;&＃61; ""){MessageBox.Show("请输入发件人邮箱地址&＃xff01;", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);return;}if (txtformPwd.Text &＃61;&＃61; ""){MessageBox.Show("请输入发件人邮箱密码&＃xff01;", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);return;}if (MessageBox.Show("您确定要发送当前邮件吗&＃xff1f;", "询问", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) &＃61;&＃61; DialogResult.OK){try{//初始化&＃xff33;mtp服务器信息setSmtpClient("smtp." &＃43; txt_SmtpServer.Text.Trim() &＃43; comboBoxEx3.Text, Convert.ToInt32(numericUpDown1.Text));}catch (Exception Ex){MessageBox.Show("邮件发送失败,请确定SMTP服务名是否正确&＃xff01;" &＃43; "\n" &＃43; "技术信息:\n" &＃43; Ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);return;}try{//验证发件邮箱地址和密码setAddressform(textBoxX2.Text.Trim() &＃43; comboBoxEx2.Text, txtformPwd.Text.Trim());}catch (Exception Ex){MessageBox.Show("邮件发送失败,请确定发件邮箱地址和密码的正确性&＃xff01;" &＃43; "\n" &＃43; "技术信息:\n" &＃43; Ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);return;}//清空历史发送信息 以防发送时收件人收到的错误信息(收件人列表会不断重复)MailMessage_Mai &＃61; new MailMessage(); MailMessage_Mai.To.Clear();//添加收件人邮箱地址MailAddress_to &＃61; new MailAddress(textBox4.Text.Trim() &＃43; comboBox4.Text.Trim());MailMessage_Mai.To.Add(MailAddress_to);//发件人邮箱MailMessage_Mai.From &＃61; MailAddress_from;//邮件主题MailMessage_Mai.Subject &＃61; txttitle.Text;MailMessage_Mai.SubjectEncoding &＃61; System.Text.Encoding.UTF8;//邮件正文MailMessage_Mai.Body &＃61; Rtb_Message.Text;MailMessage_Mai.BodyEncoding &＃61; System.Text.Encoding.UTF8;//清空历史附件 以防附件重复发送MailMessage_Mai.Attachments.Clear();//注册邮件发送完毕后的处理事件SmtpClient.SendCompleted &＃43;&＃61; new SendCompletedEventHandler(SendCompletedCallback);//开始发送邮件SmtpClient.SendAsync(MailMessage_Mai, "000000000");}}


 

5.发送邮件后处理

#region 发送邮件后所处理的函数private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e){try{if (e.Cancelled){MessageBox.Show("发送已取消&＃xff01;");}if (e.Error !&＃61; null){MessageBox.Show("邮件发送失败&＃xff01;" &＃43; "\n" &＃43; "技术信息:\n" &＃43; e.ToString(), "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);}else{MessageBox.Show("邮件成功发出!", "恭喜!", MessageBoxButtons.OK, MessageBoxIcon.Information);}}catch (Exception Ex){MessageBox.Show("邮件发送失败&＃xff01;" &＃43; "\n" &＃43; "技术信息:\n" &＃43; Ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);}}#endregion

 

参考资料连接&＃xff1a;http://www.cnblogs.com/maiweibiao/articles/1837821.html

 代码&＃xff1a;http://download.csdn.net/detail/gwblue/6353807