C#邮箱、附件发送代码,CSharp代码库,德仔网

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【CSharp】 C#邮箱、附件发送
作者:禹凤 / 发布于2015/4/14/ 837
本实例实现了邮件、附件的发送。支持：1、一对多，即支持可以同时对多个用户发送邮件；2、支持可以同时发送多个附件。

	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.IO;
	using System.Net.Mail;
	using System.Net;
	using System.Net.Mime;
	namespace SmtpEmail
	{
	 public partial class Form1 : Form
	 {
	 #region 构造函数
	 public Form1()
	 {
	 InitializeComponent();
	 }
	 #endregion
	 #region 收件邮箱地址
	 //邮箱地址添加到GridView中
	 private void btnEmailAdd_Click(object sender, EventArgs e)
	 {
	 if (!string.IsNullOrEmpty(this.txtEamilFrom.Text.Trim()))
	 {
	 if (this.txtEamilFrom.ForeColor == Color.Red)
	 {
	 MessageBox.Show("输入的收件箱格式不正确！");
	 }
	 else
	 {
	 int vRownumber = this.grdEmails.Rows.Add();
	 this.grdEmails.Rows[vRownumber].Cells[0].Value = this.txtEamilFrom.Text.Trim();
	 this.txtEamilFrom.Text = string.Empty;
	 }
	 }
	 }
	 //邮箱地址 删除
	 private void btnRemove_Click(object sender, EventArgs e)
	 {
	 if (this.grdEmails.Rows.Count > 0)
	 {
	 //只可选中一条，进行删除
	 //int vCurrentIndex = this.grdEmails.CurrentRow.Index;
	 //this.grdEmails.Rows.RemoveAt(vCurrentIndex);
	 //支持多选删除
	 foreach (DataGridViewRow vrow in grdEmails.SelectedRows)
	 {
	 int vIndex = vrow.Index;
	 this.grdEmails.Rows.RemoveAt(vIndex);
	 }
	 }
	 }
	 //邮箱地址 清空
	 private void btnClear_Click(object sender, EventArgs e)
	 {
	 this.grdEmails.Rows.Clear();
	 }
	 #endregion
	 #region 验证邮箱输入是否正确，不正确是，字体显示为红色
	 //验证 发件邮箱是否正确
	 private void txtEmailTo_Leave(object sender, EventArgs e)
	 {
	 if (!string.IsNullOrEmpty(this.txtEmailTo.Text.Trim()))
	 {
	 bool a = IsEmail(this.txtEmailTo.Text);
	 //如果不为 邮箱，字体变为红色
	 if (IsEmail(this.txtEmailTo.Text.Trim()) == false)
	 {
	 this.txtEmailTo.ForeColor = Color.Red;
	 }
	 else
	 {
	 this.txtEmailTo.ForeColor = Color.Black;
	 }
	 }
	 }
	 private bool IsEmail(string vEmail)
	 {
	 return System.Text.RegularExpressions.Regex.IsMatch(vEmail, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
	 }
	 //验证 受件箱邮箱是否正确
	 private void txtEamilFrom_Leave(object sender, EventArgs e)
	 {
	 if (!string.IsNullOrEmpty(this.txtEamilFrom.Text.Trim()))
	 {
	 bool a = IsEmail(this.txtEamilFrom.Text);
	 //如果不为 邮箱，字体变为红色
	 if (IsEmail(this.txtEamilFrom.Text.Trim()) == false)
	 {
	 this.txtEamilFrom.ForeColor = Color.Red;
	 }
	 else
	 {
	 this.txtEamilFrom.ForeColor = Color.Black;
	 }
	 }
	 }
	 #endregion
	 #region 参数
	
	 private string [] Files;//保存 附件文件路径
	 private SmtpClient vSmtpClient = null;//设置SMTP协议
	 private MailAddress vMailAddressFrom = null;//设置发件人地址，需要密码
	 private MailAddress vMailAddressTo = null;//设置收件人地址，不需要密码
	 private FileStream vFileStream = null;//附件文件流vMailAddressFrom
	 private MailMessage vMailMessage = null;
	 #endregion
	
	 #region 选择文件(支持多选，可以同时上传多个附件)
	
	 private void btnFileSelect_Click(object sender, EventArgs e)
	 {
	 OpenFileDialog vOpenSelectFile = new OpenFileDialog();
	 vOpenSelectFile.Multiselect = true;
	 vOpenSelectFile.Filter = "全部文件|*.*|Excel文件|*.xlsx;*.xls|Csv文件|*.csv";
	 vOpenSelectFile.FilterIndex = 2;
	 vOpenSelectFile.RestoreDirectory = true;
	 if (vOpenSelectFile.ShowDialog() == DialogResult.OK)
	 {
	 this.txtFile.Text = vOpenSelectFile.FileNames[0].ToString();
	 Files = new string[vOpenSelectFile.FileNames.Length];//实例化 Files，用以保存文件附近信息
	 for (int i = 0; i < vOpenSelectFile.FileNames.Length; i++)
	 {
	 Files[i] = vOpenSelectFile.FileNames[i].ToString();
	 }
	 }
	 }
	
	 #endregion
	 #region 验证页面必填项是否已经完善
	 private bool CheckPage()
	 {
	 if (string.IsNullOrEmpty(this.comServer.Text))
	 {
	 MessageBox.Show("请输入SMTP服务器名称","提示",MessageBoxButtons.OK,MessageBoxIcon.Warning);
	 return false;
	 }
	 else if (string.IsNullOrEmpty(this.numberPort.Value.ToString()))
	 {
	 MessageBox.Show("请输入SMTP服务器端口", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
	 return false;
	 }
	 else if (string.IsNullOrEmpty(this.txtEmailTo.Text))
	 {
	 MessageBox.Show("请输入发件人邮箱地址", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
	 return false;
	 }
	 else if (string.IsNullOrEmpty(this.txtformPwd.Text))
	 {
	 MessageBox.Show("请输入发件人邮箱密码", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
	 return false;
	 }
	 else if (this.grdEmails.Rows.Count < 1)
	 {
	 MessageBox.Show("请输入收件人邮箱地址", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
	 return false;
	 }
	 else if (string.IsNullOrEmpty(this.txtEmailtitle.Text))
	 {
	 MessageBox.Show("请输入邮件标题", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
	 return false;
	 }
	 return true;
	 }
	 #endregion
	 #region 邮件发送
	 //设置SMTP服务器信息
	 private void SetSmtpClient(string vServerHost,int vPort)
	 {
	 vSmtpClient = new SmtpClient();
	 vSmtpClient.Host = vServerHost;//SMTP服务器的名称
	 vSmtpClient.Port = vPort;//指定端口号
	 vSmtpClient.Timeout = 0;//超时时间
	 }
	 //验证发件人信息
	 private void SetAddressForm(string vMailAddress, string vMailPwd)
	 {
	 //创建服务器认证
	 NetworkCredential vNetwork = new NetworkCredential(vMailAddress, vMailPwd);
	 //实例化 发件人地址
	 vMailAddressFrom = new MailAddress(vMailAddress, "");
	 //指定发件人信息，包括邮箱地址和邮箱密码
	 vSmtpClient.Credentials = new NetworkCredential(vMailAddressFrom.Address, vMailPwd);
	 }
	 //检测附件大小
	 private bool Check_File(string vFilePath,out string vInfo)
	 {
	 vFileStream = new FileStream(vFilePath, FileMode.Open);
	 string vFileName = vFileStream.Name;
	 int vSize = Convert.ToInt32(vFileStream.Length / 1024 / 1024);
	 vFileStream.Close();
	 if (vSize > 15)
	 {
	 vInfo = "文件名为：" + vFileName + "的文件大小大于15M，允许上传。";
	 return false;
	 }
	 vInfo = string.Empty;
	 return true;
	 }
	 //发送
	 private void btnSaveTo_Click(object sender, EventArgs e)
	 {
	 if (CheckPage())//必填项验证通过
	 {
	 //初始化Smtp服务器信息
	 SetSmtpClient("Smtp." + this.comServer.Text.Trim(), Convert.ToInt32(this.numberPort.Value));
	 //验证发件邮箱地址和密码
	 SetAddressForm(this.txtEmailTo.Text.Trim(), this.txtformPwd.Text.Trim());
	 vMailMessage = new MailMessage();
	 //添加收件人邮箱地址
	 foreach (DataGridViewRow vRow in grdEmails.Rows)
	 {
	 vMailAddressTo = new MailAddress(vRow.Cells[0].Value.ToString().Trim());
	 vMailMessage.To.Add(vMailAddressTo);
	 }
	 //发件人邮箱
	 vMailMessage.From = vMailAddressFrom;
	 //邮件主题
	 vMailMessage.Subject = this.txtEmailtitle.Text.Trim();
	 vMailMessage.SubjectEncoding = System.Text.Encoding.UTF8;//字体使用的编码
	 //邮件正文
	 vMailMessage.Body = this.txtEmailBody.Text.Trim();
	 vMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
	 //清空历史附件，以防附件重复发送
	 vMailMessage.Attachments.Clear();
	 //添加附件
	 for (int i = 0; i < Files.Length; i++)
	 {
	 vMailMessage.Attachments.Add(new Attachment(Files[i].Trim().ToString(), MediaTypeNames.Application.Octet));
	 }
	
	 //注册邮件发送完毕后的处理事件
	 vSmtpClient.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
	 //开始发送邮件
	 vSmtpClient.SendAsync(vMailMessage,"000000000");
	 }
	 }
	 //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！");
	 }
	 if (e.Error != null)
	 {
	 MessageBox.Show("邮件发送失败！" + "\n" + "技术信息:\n" +"请验证，发件邮箱和密码是否正确！"+ 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！" + "\n" + "技术信息:\n" + Ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
	 }
	 }
	 #endregion
	 }
	}
	//释放被占用的资源
	 foreach (Attachment item in MailMessage_Mai.Attachments)
	 {
	 item.Dispose();
	 }
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