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Add multiple images to your inline email body using windows C # application

I searched this several times and found solutions, but everything only supports one image. Finally, I used this code. But the problem is that if html contains more than one image, only one image is displayed in the body, and the rest as an attachment.

string inputHtmlContent = htmlbody;
string outputHtmlContent = string.Empty;
var myResources = new List<LinkedResource>();

if ((!string.IsNullOrEmpty(inputHtmlContent)))
{
  var doc = new HtmlAgilityPack.HtmlDocument();
  doc.LoadHtml(inputHtmlContent);
  HtmlNodeCollection nodes = doc.DocumentNode.SelectNodes("//img");
  if (nodes !=null)
  {
    foreach (HtmlNode node in nodes)
    {
      if (node.Attributes.Contains("src"))
      {
        string data = node.Attributes["src"].Value;
        string imgPath = Application.StartupPath+"\\"+data;
        var imgLogo = new LinkedResource(imgPath);
        imgLogo.ContentId = Guid.NewGuid().ToString();
        imgLogo.ContentType = new ContentType("image/jpeg");
        myResources.Add(imgLogo);
        node.Attributes["src"].Value = string.Format("cid:{0}", imgLogo.ContentId);
        outputHtmlContent = doc.DocumentNode.OuterHtml;
      }
    }
  }
  else
  {
    outputHtmlContent = inputHtmlContent;
  }
  AlternateView av2 = AlternateView.CreateAlternateViewFromString(outputHtmlContent,
                            null, MediaTypeNames.Text.Html);
  foreach (LinkedResource linkedResource in myResources)
  {
    av2.LinkedResources.Add(linkedResource);
  }

  msg.AlternateViews.Add(av2);

Please help me solve this problem, how to show all the images inside the email body? ...

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2 answers

You can attach images to mail, and then put a tag imgand use ContentIdattachments as srcfollows:

private void denMailButton_Click(object sender, EventArgs e)
{
    string subject = "Subject";
    string body = @"Image 1: <img src=""$CONTENTID1$""/> <br/> Image 2: <img src=""$CONTENTID2$""/> <br/> Some Other Content";

    MailMessage mail = new MailMessage();
    mail.From = new MailAddress("from@example.com");
    mail.To.Add(new MailAddress("to@example.com"));
    mail.Subject = subject;
    mail.Body = body;
    mail.Priority = MailPriority.Normal;

    string contentID1 = Guid.NewGuid().ToString().Replace("-", "");
    string contentID2 = Guid.NewGuid().ToString().Replace("-", "");

    body = body.Replace("$CONTENTID1$", "cid:" + contentID1);
    body = body.Replace("$CONTENTID2$", "cid:" + contentID2);

    AlternateView htmlView = AlternateView.CreateAlternateViewFromString(body, null, "text/html");

    //path of image or stream
    LinkedResource imagelink1 = new LinkedResource(@"D:\1.png", "image/png");
    imagelink1.ContentId = contentID1;
    imagelink1.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;
    htmlView.LinkedResources.Add(imagelink1);

    LinkedResource imagelink2 = new LinkedResource(@"D:\2.png", "image/png");
    imagelink2.ContentId = contentID2;
    imagelink2.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;
    htmlView.LinkedResources.Add(imagelink2);

    mail.AlternateViews.Add(htmlView);

    SmtpClient client = new SmtpClient();
    client.Host = "mail.example.com";
    client.Credentials = new NetworkCredential("from@example.com", "password");
    client.Send(mail);
}

And here is a screenshot:

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. excel, csv, pdf, , .. png. png GetEmbeddedImage. .

SmtpClient smtpServer = new SmtpClient(smtpServerName);
smtpServer.Port = 25;
smtpServer.Credentials = new System.Net.NetworkCredential(userName, password);
//smtpServer.EnableSsl = true;
MailMessage smtpEmail = new MailMessage();
string messageBodyImage = @"<img width=1200 id=""MyContent"" src=""cid:{0}"">";
 toAddressList = toAddress.Split(';');
foreach (string toEmail in toAddressList)
    smtpEmail.To.Add(toEmail);

smtpEmail.From = new MailAddress(fromAddress);
smtpEmail.Body = messageBody;
smtpEmail.Subject = subject;
foreach (string format in fileExtension)
 {    
    switch (format)
     {       
    case "PNG": 
    smtpEmail.IsBodyHtml = true;
    smtpEmail.AlternateViews.Add(GetEmbeddedImage(reportByteStream, messageBodyImage, format)); 
    break;
    case "CSV":      
    smtpEmail.Attachments.Add(new System.Net.Mail.Attachment(new MemoryStream(myStream[format][0]), "MyReport." + format, "text/csv"));  
    break;
    case "XLS": 
    smtpEmail.Attachments.Add(new System.Net.Mail.Attachment(new MemoryStream(myStream[format][0]), "MyReport." + format, "application/vnd.ms-excel"));
    break;
    default: // For PDF
    smtpEmail.Attachments.Add(new System.Net.Mail.Attachment(new MemoryStream(myStream[format][0]), "MyReport." + format, MediaTypeNames.Application.Pdf));
    break;
    }
}

.

    private AlternateView GetEmbeddedImage(Dictionary<string, Byte[][]> streamAttachment, string msgTemplate, string fileFormat)
    {
        LinkedResource imageFile = null;
        AlternateView alternateView = null;
        string msgBody = string.Empty;
        try
        {
        List<LinkedResource> imageFiles = new List<LinkedResource>();
        for (int page = 0; page < streamAttachment[fileFormat].Length; page++)
        {   
                imageFile = new LinkedResource(new MemoryStream(streamAttachment[fileFormat][page]));
                imageFile.ContentId = Guid.NewGuid().ToString();
                msgBody = msgBody + "<BR/>" + string.Format(msgTemplate, imageFile.ContentId);
                imageFiles.Add(imageFile); 
        }

        alternateView = AlternateView.CreateAlternateViewFromString(msgBody, null, MediaTypeNames.Text.Html);
        imageFiles.ForEach(img => alternateView.LinkedResources.Add(img));
        }
        catch (Exception Ex)
        {

        }
        return alternateView;
    }
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