发送带有内嵌图像的电子邮件时出现问题

问题描述

我正在尝试通过电子邮件发送内嵌图像，它显示的很好，但我不仅收到图像，而且还收到与附件相同的图像。我如何获得它只是内嵌电子邮件，而没有单独的附件。

这是我的代码：

 public async static Task SendMail(string emailAccount,string sendTo,string message,string subject,string imgpath)
        {
            try
            {
                string internalEmail = emailAccount;
                string emailPassword = ConfigurationManager.AppSettings["EmailPassword"];
                string displayName = "Church Musician Team";
                MailMessage myMessage = new MailMessage();
                myMessage.To.Add(sendTo);
                myMessage.From = new MailAddress(internalEmail,displayName);
                myMessage.Subject = subject;
                string attachmentPath = imgpath;
                Attachment inline = new Attachment(attachmentPath);
                inline.Contentdisposition.Inline = true;
                inline.ContentId = "id1";
                inline.ContentType.MediaType = "image/png";
                myMessage.Attachments.Add(inline);
                myMessage.Body = message;
                myMessage.IsBodyHtml = true;
               



                using (SmtpClient smtp = new SmtpClient())
                {
                    smtp.EnableSsl = false;
                    smtp.Host = ConfigurationManager.AppSettings["EmailHost"];
                    smtp.Port = Convert.ToInt32(ConfigurationManager.AppSettings["EmailPort"]);
                    smtp.UseDefaultCredentials = false;
                    smtp.Credentials = new NetworkCredential(internalEmail,emailPassword);
                    smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
                    smtp.SendCompleted += (s,e) => { smtp.dispose(); };
                    await smtp.SendMailAsync(myMessage);
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            
        }

解决方法

您可以使用以下方法将位图数据直接嵌入到正文中：

let result = {};

function recursiveFn(Obj){
  for(let i in Obj){
   result[mappingObj[Obj[i].id] || i]=Obj[i];
  
  if(typeof Obj[i]==="object"){
    console.log('--obj--');
      recursiveFn(Obj[i]);
  }else if(Object.prototype.toString.call(Obj[i]) === '[object Array]'){
     console.log('--Array--');
    for(var k =0 ;k<Obj[i].length;k++){
      Obj[i].text = result[mappingObj[Obj[i].id] || Obj[i].text]
    }
  }
}
}

for(let i in Obj){
   result[mappingObj[Obj[i].id] || i]=Obj[i];
  
  if(typeof Obj[i]==="object"){
    console.log('----');
    recursiveFn(Obj[i])
  }else if(Object.prototype.toString.call(Obj[i]) === '[object Array]'){
    console.log('--Array--');
    for(var k =0 ;k<Obj[i].length;k++){
      Obj[i].text = result[mappingObj[Obj[i].id] || Obj[i].text]
    }
  }
}


console.log(JSON.stringify(result))

然后将其实际放置在体内的任何位置：

public static string BmpToUrl(Bitmap source)
{
    return $"data:image/png;base64,{Convert.ToBase64String((byte[]) (new ImageConverter()).ConvertTo(source,typeof(byte[])))}";
}

这样，您无需单独的附件。

诚然，我从未真正通过电子邮件完成此操作，但我相信它应该可以工作。