浅谈：ASP.NET中使用System.Net.Mail发邮件

public static void SendMail()//普通的邮件发送
{
MailAddress from = new MailAddress("FromEmail@website.com");
MailAddress to = new MailAddress("ToEmail@website.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "邮件标题";
message.Body = "邮件内容";
MailAddress copy = new MailAddress("mailto:CopyToEmail@website.com");
message.CC.Add(copy);
SmtpClient client = new SmtpClient("SMTP Server");

client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
}

public static void SendMail()//带HTML的邮件发送
{
MailAddress from = new MailAddress("FromEmail@website.com");
MailAddress to = new MailAddress("ToEmail@website.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "邮件标题";

string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain"));
string htmlBodyContent = "如果你的看到<b>这个</b>，说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>";
htmlBodyContent += "<a href=\"http://www.baidu.com//">百度一下</a>";
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html");
message.AlternateViews.Add(htmlBody);

MailAddress copy = new MailAddress("mailto:CopyToEmail@website.com ");
message.CC.Add(copy);
SmtpClient client = new SmtpClient("SMTP Server");

client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
}

public static void SendMail()//带HTML的邮件发送
{
MailAddress from = new MailAddress("FromEmail@website.com");
MailAddress to = new MailAddress("ToEmail@website.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "邮件标题";

string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain"));
string htmlBodyContent = "如果你的看到<b>这个</b>，说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>";
htmlBodyContent += "<a href=\"http://www.baidu.com//">百度一下</a>";
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html");
message.AlternateViews.Add(htmlBody);

Attachment attachment = new Attachment("C:\\附件.rar");
message.Attachments.Add(attachment);

MailAddress copy = new MailAddress("mailto:CopyToEmail@website.com");
message.CC.Add(copy);
SmtpClient client = new SmtpClient("SMTP Server");

client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
}

public static void SendMail()//带HTML，并且HTML中有图片的邮件发送
{
MailAddress from = new MailAddress("FromEmail@website.com");
MailAddress to = new MailAddress("ToEmail@website.com");

MailMessage message = new MailMessage(from, to);
message.Subject = "邮件标题";

string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain"));
string htmlBodyContent = "如果你的看到<b>这个</b>，说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>";
htmlBodyContent += "<a href=\"http://www.baidu.com//">百度一下</a><img src=\"cid:imageInEmail\"/>";
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html");

LinkedResource lrImage = new LinkedResource("C:\\图片.jpg", System.Net.Mime.MediaTypeNames.Image.Jpeg);
lrImage.ContentId = "imageInEmail"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ,如果设置不正确,请不会显示图片
htmlBody.LinkedResources.Add(lrImage);

message.AlternateViews.Add(htmlBody);

MailAddress copy = new MailAddress("mailto:CopyToEmail@website.com");
message.CC.Add(copy);
SmtpClient client = new SmtpClient("SMTP Server");

client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
}

public static void SendMail()//带HTML，并且HTML中有图片的邮件发送
{
MailAddress from = new MailAddress("FromEmail@website.com");
MailAddress to = new MailAddress("ToEmail@website.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "邮件标题";

string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain"));
string htmlBodyContent = "如果你的看到<b>这个</b>，说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>";
htmlBodyContent += "<a href=\"http://www.baidu.com//">百度一下</a><img src=\"cid:imageInEmail\"/>";
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html");

MemoryStream imgStream = GetImage();
imgStream.Position = 0;//非常重要，否则图片为空！在邮件里显示红叉
LinkedResource lrImage = new LinkedResource(imgStream, System.Net.Mime.MediaTypeNames.Image.Jpeg);
lrImage.ContentId = "imageInEmail"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片
htmlBody.LinkedResources.Add(lrImage);

message.AlternateViews.Add(htmlBody);

MailAddress copy = new MailAddress("mailto:CopyToEmail@website.com");
message.CC.Add(copy);
SmtpClient client = new SmtpClient("SMTP Server");

client.Credentials = CredentialCache.DefaultNetworkCredentials;
client.Send(message);
}

public static MemoryStream GetImage()
{
//Code here... ...
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net.Mail;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Mime;

namespace BI.MailService.Mail
{
public class BIMailService
{
SmtpClient SmtpClient = null;   //设置SMTP协议
MailAddress MailAddress_from = null; //设置发信人地址  当然还需要密码
MailAddress MailAddress_to = null;  //设置收信人地址  不需要密码
MailMessage MailMessage_Mai = null;
FileStream FileStream_my = null; //附件文件流

#region 设置Smtp服务器信息
/// <summary>
/// 设置Smtp服务器信息
/// </summary>
/// <param name="ServerName">SMTP服务名</param>
/// <param name="Port">端口号</param>
private void setSmtpClient(string ServerHost, int Port)
{
SmtpClient = new SmtpClient();
SmtpClient.Host = 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 = Port; //指定端口号
SmtpClient.Timeout = 0;  //超时时间
}
#endregion

#region 验证发件人信息
/// <summary>
/// 验证发件人信息
/// </summary>
/// <param name="MailAddress">发件邮箱地址</param>
/// <param name="MailPwd">邮箱密码</param>
private void setAddressform(string MailAddress, string MailPwd)
{
//创建服务器认证
NetworkCredential NetworkCredential_my = new NetworkCredential(MailAddress, MailPwd);
//实例化发件人地址
MailAddress_from = new System.Net.Mail.MailAddress(MailAddress, "报表系统");
MailMessage_Mai.From = MailAddress_from;
//指定发件人信息  包括邮箱地址和邮箱密码
SmtpClient.Credentials = new System.Net.NetworkCredential(MailAddress_from.Address, MailPwd);
}
#endregion

#region 检测附件大小
private bool Attachment_MaiInit(string path)
{
try
{
FileStream_my = new FileStream(path, FileMode.Open);
string name = FileStream_my.Name;
int size = (int)(FileStream_my.Length / 1024 / 1024);
FileStream_my.Close();
//控制文件大小不大于10Ｍ
if (size > 10)
{
return false;
}
return true;
}
catch (IOException e)
{
return false;
}
}
#endregion

#region 添加收件人
/// <summary>
/// 添加收件人列表
/// </summary>
/// <param name="list">收件人名单</param>
private void AddAddressee(string[] list)
{
foreach (string address in list)
{
if (address != list[0])//第一个收件人已经添加
{
MailAddress_to = new MailAddress(address);
MailMessage_Mai.To.Add(MailAddress_to);
}
//MailMessage_Mai.CC.Add(new MailAddress("test@beisen.com"));//将收件人加入域中
//MailMessage_Mai.Bcc.Add(new MailAddress("1234567@qq.com"));
}
}
#endregion

public string SendMessage(string server, string accessoriesPath, string[] toMailAddressList, string subject, string body)
{
try
{
MailMessage_Mai = new MailMessage("test@gmail.com", toMailAddressList[0]);
MailMessage_Mai.Subject = subject;
MailMessage_Mai.SubjectEncoding = Encoding.UTF8;//进行字符格式转换，否则可能收到的邮件出现乱码
MailMessage_Mai.Body = body;
MailMessage_Mai.BodyEncoding = Encoding.UTF8;
MailMessage_Mai.IsBodyHtml = true;
MailMessage_Mai.Priority = MailPriority.High;//指定邮件优先级
SmtpClient = new SmtpClient(server);

string plainTextBody = "如果你邮件客户端不支持HTML格式，或者你切换到“普通文本”视图，将看到此内容";
MailMessage_Mai.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plainTextBody, null, "text/plain"));
string htmlBodyContent = "如果你的看到<b>这个</b>，说明你是在以 <span style=\"color:red\">HTML</span> 格式查看邮件<br><br>";
htmlBodyContent += "<a href=\"http://www.baidu.com//\">百度一下</a><img src=\"cid:imageInEmail\"/>";
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(htmlBodyContent, null, "text/html");

MemoryStream imgStream = GetImage();
imgStream.Position = 0;//非常重要，否则图片为空！在邮件里显示红叉
LinkedResource lrImage = new LinkedResource(imgStream, System.Net.Mime.MediaTypeNames.Image.Jpeg);
lrImage.ContentId = "imageInEmail"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片
htmlBody.LinkedResources.Add(lrImage);

MailMessage_Mai.AlternateViews.Add(htmlBody);

setSmtpClient("smtp.gmail.com", 587);//587这是gmail的端口号，一般中国的邮箱发不了邮件就是因为端口号封闭了，不能提供第三方开发者调用。
setAddressform("test@gmail.com", "mima");
if (toMailAddressList.Length > 1)
{
AddAddressee(toMailAddressList);
}
SmtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
SmtpClient.EnableSsl = true;
if (accessoriesPath.Trim() != "")
{
MailMessage_Mai.Attachments.Clear();//添加附件
MailMessage_Mai.HeadersEncoding = Encoding.UTF8;
MailMessage_Mai.Attachments.Add(new Attachment(accessoriesPath, MediaTypeNames.Application.Octet));
}
SmtpClient.Send(MailMessage_Mai);
return "发送成功！";
}
catch (Exception ey)
{
throw ey;
}
}

public static MemoryStream GetImage()
{
//Code here... ...
return null;
}
}
}