C# WinFrom 发送邮件
C# Winforms 发送邮件
发送邮件时用到以下来个命名空间：
using System.Net;
using System.Net.Mail;
发送邮件的发信人邮箱必须使用smtp协议的邮箱，例如163、126、sina 等邮箱（但是163、226的早期注册的用户使用了些协议，126邮箱从06年6六月份后的注册的邮箱都不可用，而sina邮箱里可以自己设置是否启用smtp协议）其它邮箱类同
以126为例 smtp服务器为：smtp.126.com
以下为程序截图：
以下为全部代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Mail;
namespace Mail
{
public partial class mailone : Form
{
public mailone()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (fjr.Text.Length == 0 || sjr.Text.Length == 0)
{
MessageBox.Show("请填写Email地址", "填写不完整", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
return;
}
try
{
YanZheng(fjr.Text, sjr.Text); //验证邮件格式
}
catch (EmailErrorException ex)
{
MessageBox.Show(ex.Message, "Email格式错误", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
return;
}
string fjrtxt = fjr.Text;
string mmtxt = mm.Text;
string sjrtxt = sjr.Text;
string zttxt = zt.Text;
string fjtxt = fj.Text;
string nrtxt = nr.Text;
string[] fasong = fjrtxt.Split('@');
string[] fs = fasong[1].Split('.');
//发送
SmtpClient client = new SmtpClient("smtp." + fs[0].ToString().Trim() + ".com"); //设置邮件协议
client.UseDefaultCredentials = false;//这一句得写前面
client.DeliveryMethod = SmtpDeliveryMethod.Network; //通过网络发送到Smtp服务器
client.Credentials = new NetworkCredential(fasong[0].ToString(), mmtxt); //通过用户名和密码 认证
MailMessage mmsg = new MailMessage(new MailAddress(fjrtxt), new MailAddress(sjrtxt)); //发件人和收件人的邮箱地址
mmsg.Subject = zttxt; //邮件主题
mmsg.SubjectEncoding = Encoding.UTF8; //主题编码
mmsg.Body = nrtxt; //邮件正文
mmsg.BodyEncoding = Encoding.UTF8; //正文编码
mmsg.IsBodyHtml = true; //设置为HTML格式
mmsg.Priority = MailPriority.High; //优先级
if (fj.Text.Trim() != "")
{
mmsg.Attachments.Add(new Attachment(fj.Text));//增加附件
}
try
{
client.Send(mmsg);
MessageBox.Show("邮件已发成功");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void button3_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
fj.Text = openFileDialog1.FileName; //得到附件的地址
}
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
private bool YanZheng(string fmail, string smail)
{
string[] subStrings = smail.Split('@');
string[] subStrings1 = fmail.Split('@');
if (subStrings.Length != 2 || subStrings1.Length != 2)
{
throw new EmailErrorException();
}
else
{
int index = subStrings[1].IndexOf(".");
int index1 = subStrings1[1].IndexOf(".");
if (index <= 0 || index1 <= 0)
{
throw new EmailErrorException();
}
if (subStrings[1][subStrings[1].Length - 1] == '.' || subStrings1[1][subStrings[1].Length - 1] == '.')
{
throw new EmailErrorException();
}
}
return true;
}
}
}
//以下为程序类文件，用于验证填写邮箱地址是否正确
using System;
using System.Collections.Generic;
using System.Text;
namespace Mail
{
public class EmailErrorException : ApplicationException
{
public string _message;
public EmailErrorException()
: base()
{
_message = null;
}
public EmailErrorException(string message)
: base()
{
_message = message.ToString();
}
public EmailErrorException(string message, Exception myNew)
: base(message, myNew)
{
_message = message.ToString();
}
public override string Message
{
get
{
return "Email格式错误。";
}
}
}
}