邮件系列（二）-发送邮件

通过上一篇配置本地邮件服务器，已经实现了手动发送，接收邮件的功能。

接下来，我们就试试用代码实现发邮件。

我们都知道，邮件一般包括，发件人，收件人，邮件服务器，邮件。那么我们就按照这个思路来写代码

1.发送一封简单的邮件

private static void SendSimpleMail()
{
    //1.创建一封邮件对象
    MailMessage mail=new MailMessage();
    mail.Subject = "我是邮件的主题";
    mail.SubjectEncoding = Encoding.UTF8;
    mail.Body = "我是邮件的正文";
    mail.BodyEncoding = Encoding.UTF8;
    //发件人
    mail.From=new MailAddress(lisi@163.com,"李小四");
    //收件人
    mail.To.Add(new MailAddress(wangwu@163.com,"王小五"));
    //2.创建一个发送邮件的类
    SmtpClient client=new SmtpClient("127.0.0.1");
    client.Credentials=new NetworkCredential("lisi@163.com","lisi");
    client.Send(mail);
    Console.WriteLine("ok");
}

在Foxmail中如下图

查看邮件源码

2.发送一封带html的邮件

private static void SendHtmlMail()
{
    //1.创建一封邮件对象
    MailMessage mail = new MailMessage();
    mail.Subject = "我是邮件的主题";
    mail.SubjectEncoding = Encoding.UTF8;
    mail.Body = "我是邮件的正文";
    mail.BodyEncoding = Encoding.UTF8;
    //发件人
    mail.From = new MailAddress("lisi@163.com", "李四");
    //收件人
    mail.To.Add(new MailAddress("wangwu@163.com", "王五"));
    //-----------------------------------------------------------

    //设置该邮件的格式为html
    AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(
        "你好<font colof='red' size=7>中国</font><hr/>", null, "text/html");
    //将该html内容添加 到邮件中
    mail.AlternateViews.Add(htmlBody);

    //-----------------------------------------------------------
    //2.创建一个发送邮件的类
    SmtpClient client = new SmtpClient("127.0.0.1");
    client.Credentials = new NetworkCredential("lisi@163.com", "lisi");
    client.Send(mail);
    Console.WriteLine("ok");
}

在Foxmail中如下图

3.发送一封带显示图片的邮件

private static void SendMailWithImg()
{
    //1.创建一封邮件对象
    MailMessage mail = new MailMessage();
    mail.Subject = "我是邮件的主题";
    mail.SubjectEncoding = Encoding.UTF8;
    mail.Body = "我是邮件的正文";
    mail.BodyEncoding = Encoding.UTF8;
    //发件人
    mail.From = new MailAddress("lisi@163.com", "李四");
    //收件人
    mail.To.Add(new MailAddress("wangwu@163.com", "王五"));
    //-----------------------------------------------------------
    //设置邮件格式为html，将img标签设置到html中
    AlternateView htmlBody =
       AlternateView.CreateAlternateViewFromString("<img src='cid:aa' width='100px' height='100px'/>", null,
           "text/html");
    //创建一个链接资源，
    LinkedResource lr=new LinkedResource("h:/1.jpg","image/gif");
    //设置此链接资源MIME内容ID
    lr.ContentId = "aa";
    //将该链接资源添加到html中
    htmlBody.LinkedResources.Add(lr);
    //将html内容添加到邮件中
    mail.AlternateViews.Add(htmlBody);

    //-----------------------------------------------------------
    //2.创建一个发送邮件的类
    SmtpClient client = new SmtpClient("127.0.0.1");
    client.Credentials = new NetworkCredential("lisi@163.com", "lisi");
    client.Send(mail);
    Console.WriteLine("ok");
}

在Foxmail中如下图

4.发送一封带附件的邮件

private static void SendMailWithAttachment()
{
    //1.创建一封邮件对象
    MailMessage mail = new MailMessage();
    mail.Subject = "我是邮件的主题";
    mail.SubjectEncoding = Encoding.UTF8;
    mail.Body = "我是邮件的正文";
    mail.BodyEncoding = Encoding.UTF8;
    //发件人
    mail.From = new MailAddress("lisi@163.com", "李四");
    //收件人
    mail.To.Add(new MailAddress("wangwu@163.com", "王五"));
    //-----------------------------------------------------------
    //添加附件
    Attachment a1=new Attachment(@"h:/1.jpg");
    Attachment a2=new Attachment(@"h:/1.rar");
    Attachment a3=new Attachment(@"h:/1.docx");

    mail.Attachments.Add(a1);
    mail.Attachments.Add(a2);
    mail.Attachments.Add(a3);
    //-----------------------------------------------------------
    //2.创建一个发送邮件的类
    SmtpClient client = new SmtpClient("127.0.0.1");
    client.Credentials = new NetworkCredential("lisi@163.com", "lisi");
    client.Send(mail);
    Console.WriteLine("ok");
}

在Foxmail中如下图