Question

我使用三个班级发送电子邮件，但我无法将文字电子邮件与图片合并，或只是发送图片。当我收到电子邮件时，我看到空图像。帮我改变我的代码，以便我可以发送电子邮件：

文本
图像

和风格

   public class SendService : IDistributionProvider
 {
   public int Send(System.Xml.Linq.XDocument recipientsData, string subject, string fromName, string fromAccount)
{
    foreach (XElement element in recipientsData.Root.Elements())
    {
        string email = element.Element("email").Value;
        string name = element.Element("name").Value;
        string message = element.Element("message").Value;

        bool result = EmailUtils.SendEmail(fromAccount, fromName, email, name, subject, message.Replace("\n", "<br/>"));
    }

    return 1;
}


public interface IDistributionProvider
{
int Send(XDocument recipientsData, string subject, string fromName, 
 string fromAccount);
}


public static class EmailUtils
{
 private static string sendHostName;
 private static int sendPort;
 private static string userName;
 private static string password;
 private static string defaultFromEmail;
 private static string defaultFromName;

 static EmailUtils()
 {
    sendHostName = ConfigurationManager.AppSettings["sendHostName"];
    sendPort = int.Parse(ConfigurationManager.AppSettings["sendPort"]);
    defaultFromEmail = ConfigurationManager.AppSettings["fromEmail"];
    defaultFromName = ConfigurationManager.AppSettings["fromName"];

    string credential = Utils.DecryptString(ConfigurationManager.AppSettings["credential"]);
    if (!string.IsNullOrEmpty(credential) && credential.Split(";".ToCharArray()).Length > 1)
    {
        userName = credential.Split(";".ToCharArray())[0];
        password = credential.Split(";".ToCharArray())[1];
    }
}

public static bool SendEmail(string toEmail, string toName, string subject, string body)
{
    return SendEmail(defaultFromEmail, defaultFromName, toEmail, toName, subject, body);
}

public static bool SendEmail(string fromEmail, string fromName, string toEmail, string toName, string subject, string body)
{
    try
    {
        if (string.IsNullOrEmpty(toEmail))
        {
            return false;
        }

        if (string.IsNullOrEmpty(toName))
        {
            toName = toEmail.Substring(0, toEmail.IndexOf("@"));
        }

        if (string.IsNullOrEmpty(fromEmail))
        {
            fromEmail = defaultFromEmail;
        }

        if (string.IsNullOrEmpty(fromName))
        {
            fromName = defaultFromName;
        }

        Message message = new Message();
        message.Charset = "UTF-8";
        message.Subject = Codec.RFC2047Encode(subject, "UTF-8");
        message.From = new Address(fromEmail, fromName);
        message.To.Add(toEmail, toName);
        message.BodyHtml.Format = BodyFormat.Html;
        message.BodyHtml.Charset = "UTF-8";
        message.BodyHtml.Text = body;

        return ActiveUp.Net.Mail.SmtpClient.SendSsl(message, sendHostName, sendPort, userName, password, SaslMechanism.Login);
    }
    catch
    {
        return false;
    }
}

}

通过这种方式，我发送电子邮件 - 只是文字：

 string bodyEmail = "<h2>Welcome to website</h2></br><div><p>Thank for using website</p></div>";

        EmailUtils.SendEmail("xxx@gmail.com","xxxx","Contact",bodyEmail);

Answer 1

最简单的方法是使用Data URIs.

内联您的图片

您基本上将图片内嵌到邮件的HTML中。只需按照格式

data:[<MIME-type>][;charset=<encoding>][;base64]

其中mime-type可能是image / jpeg，charset应该是ASCII，并且图像的字节转换为base64。你可以通过从磁盘读取图像文件的字节来获得它

byte[] imaeg = File.ReadAllBytes("nekkedladies.jpg");

然后convert the byte array to a base 64 string

var base64Imaeg = System.Convert.ToBase64String(imaeg);

将它一起拍打并粘贴在你的html中（从wiki中偷来）

＆lt; img src =＆＃34; data：image / png; base64，iVBORw0KGgoAAAANSUhEUgAAAAUA AAAFCAYAAACNbyblAAAAHElEQVQI12P4 // 8 / w38GIAXDIBKE0DHxgljNBAAO 9TXL0Y4OHwAAAABJRU5ErkJggg ==＆＃34; alt =＆＃34; Nekkid Ladies＆＃34; /＆GT;

顺便说一下，示例图像数据不是nekkid女士。就是这样：

nekked ladies
遗憾

Answer 2

我实际遇到了同样的问题，真正帮助我的是this。在我的情况下，我有html，我不得不使用HtmlUtilityPack解析它。我不建议使用编码的字符串，因为它不是fully supported，它会使你的消息膨胀。 cid方式也是outlook如何将图像添加到电子邮件中。我添加了代码，但我认为这个例子在我的情况下已经足够了。

Mvc .Net.Mail：如何发送带图像的电子邮件（徽标）

2 个答案: