ASP.net下调用SmtpClient实现smtp方式邮件发送(带附件)

做asp.net的网站被要求要加入一个邮件自动发送的功能，同时还要加入附件网上搜索了很多，自己记录总结一下
废话说完先贴代码：

public class MyMail
{
private MyMail(string title, string content, string from, string to)
{
this.Title = title;
this.Content = content;
this.SendFrom = from;
this.SendTo = to;
this.IsHTML = false;
this.Priority = System.Net.Mail.MailPriority.Normal;
this.Accessories = new List<string>();
}
/// <summary>
/// 创建封邮件
/// </summary>
/// <param name="title">标题</param>
/// <param name="content">正文</param>
/// <param name="from">发件邮箱</param>
/// <param name="to">收件邮箱</param>
/// <returns></returns>
public static MyMail CreateMail(
string title, string content, string from, string to)
{
return new MyMail(title, content, from, to);
}

/// <summary>
/// 添加附件
/// </summary>
/// <param name="path">附件存放路径</param>
public void AddAccessory(string path)
{
this.Accessories.Add(path);
}

/// <summary>
/// 移除添加的附件
/// </summary>
/// <param name="path">附件存放路径</param>
public void RemoveAccessory(string path)
{
this.Accessories.Remove(path);
}

/// <summary>
/// 邮件标题
/// </summary>
public string Title { get; set; }

/// <summary>
/// 正文内容
/// </summary>
public string Content { get; set; }

/// <summary>
/// 发件邮箱地址
/// </summary>
public string SendFrom { get; set; }

/// <summary>
/// 收件邮箱地址
// </summary>
public string SendTo { get; set; }

/// <summary>
/// 正文格式是否为Html
/// </summary>
public bool IsHTML { get; set; }

/// <summary>
/// 邮件优先级
/// </summary>
public System.Net.Mail.MailPriority Priority { get; set; }

/// <summary>
/// 携带附件存放路径
/// </summary>
public List<string> Accessories { get; set; }
}

public class MailServer
{
private MailServer(string server,string usr,string passwnd)
{
this.Port = 25;
this.TimeOut=9999;
this.ServerHost = server;
this.UserName = usr;
this.PassWnd = passwnd;
}

/// <summary>
/// 创建一个邮件发送服务
/// </summary>
/// <param name="server"服务></param>
/// <param name="usr">账户登录名</param>
/// <param name="passwnd">密码</param>
/// <returns></returns>
public static MailServer CreateMailServer(
string server, string usr, string passwnd)
{
return new MailServer(server, usr, passwnd);
}

/// <summary>
/// smtp服务地址
/// </summary>
public string ServerHost { get; set; }

/// <summary>
/// 登录用户名
/// </summary>
public string UserName { get; set; }

/// <summary>
/// 登录密码
/// </summary>
public string PassWnd { get; set; }

/// <summary>
/// 端口号默认不用设置为25
/// </summary>
public int Port { get; set; }

/// <summary>
/// 超时设定
/// </summary>
public int TimeOut { get; set; }
}

public class MailSend
{
protected System.Net.Mail.SmtpClient _client;

public MailSend(MailServer server)
{
_client= new System.Net.Mail.SmtpClient(server.ServerHost,server.Port);
_client.Credentials = new System.Net.NetworkCredential(
server.UserName,server.PassWnd);
_client.Timeout = server.TimeOut;
}

public bool Send(MyMail mymail)
{
try
{
//邮件发送人地址
System.Net.Mail.MailAddress from =
new System.Net.Mail.MailAddress(mymail.SendFrom);
//收件人地址
System.Net.Mail.MailAddress to =
new System.Net.Mail.MailAddress(mymail.SendTo);
System.Net.Mail.MailMessage mail =
new System.Net.Mail.MailMessage(mymail.SendFrom, mymail.SendTo);
mail.Subject = mymail.Title;
mail.Body = mymail.Content;
mail.IsBodyHtml = mymail.IsHTML;
//添加附件
foreach (string accessory in mymail.Accessories)
{
System.Net.Mail.Attachment data = new System.Net.Mail.Attachment(accessory);
mail.Attachments.Add(data);
}
_client.Send(mail);
mail.Dispose();
return true;
}
catch
{
return false;
}
}
}

附上三个类的类图：



再给个实际调用的例子：

MailServer server =
MailServer.CreateMailServer(
"smtp.163.com",
" sender@163.com ",
"******");//此处填写stmp服务提供商、登录帐号、密码
MyMail mail=MyMail.CreateMail(
"测试邮件标题",
"你好这是一封测试邮件",
"sender@163.com",
"receiver@sina.com");			//此处填写邮件标题、正文、发送者邮箱和接受者邮箱
mail.AddAccessory(@"E:\Winter.jpg");//此处用于添加本地路径附件
MailSend mailsender = new MailSend(server);
if (mailsender.Send(mail))
{
//邮件发送成功
}
else
{
//失败处理
}

注意：邮件发送者必须与服务提供商是同一个。例如：发送者邮箱为163的邮箱，登录名、密码和stmp服务提供商就必须是163的。
另外有些邮箱，例如qq邮箱必须先登录邮箱手动开启stmp服务！！！