Get an image of the body of an email, write to the database or in memory and show it in a new Viewer

Question

I’m trying to build an E-mail viewer.

To do so, I access my IMAP server and get email using the DLL ComponentSoft.Net.Mail.

After getting the message, I intend to present it in my viewer.

However, I am having problems with Linked Sources, this because I do not intend to store them physically but only store them in MemoryStream or BD byte array.

The problem is getting the image of any of these sites, because I want to put it back as CID in the Body email, so that my viewer presents it. However I am not getting that CID.

What to do?

For better understanding I put the code I’m using:

 Dim img As Drawing.Image = Drawing.Image.FromStream(email.LinkedResources(i).GetContentStream)
 Dim converter As New Drawing.ImageConverter
 Dim byteImage As Byte() = converter.ConvertTo(img, GetType(Byte()))
 Dim base64 As String = System.Convert.ToBase64String(byteImage)
 Dim LR As String = "cid:" + email.LinkedResources(i).ContentIdentifier
 If MailBody.Contains(LR) Then
     MailBody = Replace(MailBody, LR, "<img src=data:image/gif;base64," + base64)
 End If

Answer 1

As I proposed in the comments, it seems to be the ideal solution to convert the image to String Base64 and then just unfurl it. Since I’m basing that you’re using C#, my answer will be in C#, if it’s not I’ll fix it later.

My sample code was taken from this website SOEN question.

Converting to Base64

public string ConvertImageToBase64(byte[] imageFile){
  MemoryStream ms = new MemoryStream(imageFile);
  Image imgContainer = ScaleImage(Image.FromStream(ms));//Salva a imagem com novas proporções, caso necessário
  ms = new MemoryStream();
  imgContainer.Save(ms,System.Drawing.Imaging.ImageFormat.Png); //Modificar o Png para o formato da imagem
  return Convert.ToBase64String(ms.ToArray());
}

Returning from Base64 to image

public BitmapImage Base64Image(string imgBase64){
  byte[] fileBytes = Convert.FromBase64String(base64string);    
  MemoryStream ms = new MemoryStream(fileBytes, 0, fileBytes.Length);
  ms.Write(fileBytes, 0, fileBytes.Length);
  BitmapImage bitmapImage = new BitmapImage();
  bitmapImage.SetSource(ms);
  return bitmapImage;
}

Basically this makes the conversion and disconnection, if you want to use the image internally to the program, as a BitmapImage.

If you want to create a file with the image, as seen here:

public void SaveImage(string imageBase64, string filePath){
  byte[] bytes = Convert.FromBase64String(imageBase64.Content);
  using (var imageFile = new FileStream(filePath, FileMode.Create)){
    imageFile.Write(bytes ,0, bytes.Length);
    imageFile.Flush();
  }
}

This conversion may also facilitate storage if necessary.