C# 使用SMTP发送附件

快来打我* 2021-12-16 04:34 223阅读 0赞

转载自 http://blog.csdn.net/kkkkkxiaofei/article/details/7941239

几年前有股学C\#的热情，写下了C\#发送邮件和C\#发送带附件的邮件文章，放到baidu上。之前有有放到ttlsa上，但是搜索发现文章貌似被删除了，今天特意重新补充一下。此文留作记录.

以下代码除了实现发送简单的邮件以外，还包括了发送附件。From图没有贴出，上面就两按钮，一个“添加附件”、一个“发送”。点击添加附件选择文件， 文件路径全存储在listbox1中。在发送按钮方法中，把listbox1所有的文件添加到mailmessage对象里作为邮件发送出去了，请看代码  
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.Mail;  
using System.Net;  
using System.Net.Security;  
using System.IO;  
using System.Net.Mime;

namespace SmtpTest  
\{  
public partial class Form1 : Form  
\{  
public Form1()  
\{  
InitializeComponent();  
\}

private void button1\_Click(object sender, EventArgs e)  
\{  
try  
\{  
//定义一个mail对象  
MailMessage mailmessage = new MailMessage(““, ““, “this is a test”, “yes!test!”);  
//from email，to email，主题，邮件内容  
mailmessage.Priority = MailPriority.Normal; //邮件优先级  
SmtpClient smtpClient = new SmtpClient(“smtp.163.com”, 25); //smtp地址以及端口号  
smtpClient.Credentials = new NetworkCredential(“ttlsa.com”, “xxxxxx”);//smtp用户名密码  
smtpClient.EnableSsl = true; //启用ssl

//添加附件  
Attachment attachment =null;  
if(listBox1.Items.Count>0)  
\{  
for (int i = 0; i < listBox1.Items.Count; i++)  
\{  
string pathFileName = listBox1.Items\[i\].ToString();  
string extName = Path.GetExtension(pathFileName).ToLower(); //获取扩展名  
if(extName==”.rar”||extName==”.zip”) //.rar和.zip的文件属于压缩文件类型  
\{  
attachment = new Attachment(pathFileName,MediaTypeNames.Application.Zip);

\}else  
\{  
attachment = new Attachment(pathFileName,MediaTypeNames.Application.Octet);  
\}  
//设置附件的MIME信息  
ContentDisposition cd = attachment.ContentDisposition;  
cd.CreationDate = File.GetCreationTime(pathFileName);//设置附件的创建时间  
cd.ModificationDate = File.GetLastWriteTime(pathFileName);//设置附件的修改时间  
cd.ReadDate = File.GetLastAccessTime(pathFileName);//设置附件的访问时间  
mailmessage.Attachments.Add(attachment);//将附件添加到mailmessage对象  
\}  
\}  
smtpClient.Send(mailmessage);  
MessageBox.Show(“发送成功”);  
\}  
catch (SmtpException se)  
\{  
MessageBox.Show(se.StatusCode.ToString());  
\}  
\}

//添加附件,把文件添加到listbox中  
private void button2\_Click(object sender, EventArgs e)  
\{  
OpenFileDialog opd = new OpenFileDialog();//定义一个选择文件的对话框  
opd.Multiselect = true;//允许选择多个文件  
opd.CheckFileExists = true;//检查文件是否存在  
opd.ValidateNames = true;//检查文件名的可用性  
opd.ShowDialog();//打开对话框  
if(opd.FileNames.Length>0)//将选择的文件路径写入listbox中  
\{  
listBox1.Items.AddRange(opd.FileNames);  
\}  
\}  
\}  
\}

转载于:https://www.cnblogs.com/TJessica/p/6576155.html

[Windows]: http://www.ttlsa.com/windows/