I can't get my pictures to embed properly, when the email arrives they appear only as attachments. The "dynamic" part is that the number of pictures in an email isn't known until it's about to be sent. This is an example of what the HTML might look like before it gets sent.
<html>
<body>
<h1>LineOne</h1>
<p>LineTwo</p>
<img src='cid:1' alt='ImageOne'></img>
<img src='cid:2' alt='ImageTwo'></img>
</body>
</html>
The email arrives but only the text is shown, the images appear as attachments. If it makes any difference, I'm using LinkedResources in VB.NET. When I used the same code to send a single image (ie not dynamic), it embedded properly. I can't work out what's different this time.
EDIT: Here is my VB code, to add a bit of context.
Private Sub TimeBeforeEmailSent_Tick(sender As System.Object, e As System.EventArgs) Handles TimeBeforeEmailSent.Tick
Dim sendEmail As New sendEmail
Dim image(numberOfPhotosTaken) As Object
For i = 1 To numberOfPhotosTaken
image(i) = New LinkedResource((Mid(Application.ExecutablePath, 1, (Application.ExecutablePath.Length - 9)) + i.ToString + ".jpg"), "image/jpeg")
Next
sendEmail.write(numberOfPhotosTaken, image)
TimeBeforeEmailSent.Enabled = False
End Sub
And here is the class sendEmail:
Imports System.Net.Mail
Imports System.IO
Public Class sendEmail
Dim bodyText As String = "<html><body><h1>Heading</h1><p>Body</p>"
Dim alternateView As AlternateView = AlternateView.CreateAlternateViewFromString(bodyText, Nothing, "text/html")
Public Sub write(numberOfPhotosTaken As Integer, image As Array)
For i = 1 To numberOfPhotosTaken
Try
image(i).ContentId = i
image(i).TransferEncoding = Net.Mime.TransferEncoding.Base64
alternateView.LinkedResources.Add(image(i))
bodyText = bodyText & "<img src='cid:" & i & "' alt='image from webcam'></img>"
Catch ex As Exception
'This exception means two or more photos were taken in such quick succession that the camera couldn't keep up
'Therefore, the program thinks more photos were taken than actually exist
End Try
Next
bodyText = bodyText & "</body></html>"
Dim Mail As New MailMessage
Mail.Headers.Add("Content-Type", "multipart/related")
Mail.Headers.Add("Content-Disposition", "inline")
Mail.AlternateViews.Add(alternateView)
Mail.Subject = "Subject"
Mail.To.Add(Lockscreen.sendToAddress)
Mail.From = New MailAddress(removed for privacy)
Mail.Body = Nothing
send(Mail)
End Sub
Sub send(Mail)
Dim SMTP As New SmtpClient
SMTP.EnableSsl = True
SMTP.Credentials = New System.Net.NetworkCredential(removed for privacy)
SMTP.Port = "587"
SMTP.Host = "smtp.gmail.com"
SMTP.Send(Mail)
Dim filePath As String
For i = 1 To Lockscreen.numberOfPhotosTaken
Try
filePath = (Mid(Application.ExecutablePath, 1, (Application.ExecutablePath.Length - 9)) + i.ToString + ".jpg")
File.Delete(filePath)
Catch ex As Exception
End Try
Next
End Sub
End Class
You didn't add the code where you construct and add the
LinkedResourceto the mail, but make sure that:When you construct the
LinkedResource, make sure you use the constructor where you can pass in the correct ContentType of the imageAdd 2 headers to the
MailMessageobject:_mail.Headers.Add("Content-Type", "multipart/related")
_mail.Headers.Add("Content-Disposition", "inline")