(VB.NET) SendGrid HTML Email with Embedded Images

See more SendGrid Examples

Demonstrates how to send an HTML email with embedded images using SendGrid.

Chilkat .NET Downloads

Chilkat .NET Framework

Chilkat for .NET Core

' This requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code

Dim req As New Chilkat.HttpRequest
Dim http As New Chilkat.Http

Dim success As Boolean

' First.. load a JPG file and build an HTML img tag with the JPG data inline encoded.
' Our HTML img tag will look like this:
' <img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEA3ADcAA..." alt="" style="border-width:0px;" />
Dim bdJpg As New Chilkat.BinData
success = bdJpg.LoadFile("qa_data/jpg/starfish.jpg")
If (success = False) Then
    Debug.WriteLine("Failed to load JPG file.")
    Exit Sub
End If


' Note: HTML containing embedded base64 image data may not be visible in all email clients.
' For example, GMail might not display the image, but viewing in Outlook might be OK.
Dim sbHtml As New Chilkat.StringBuilder
sbHtml.Append("<html><body><b>This is a test<b><br /><img src=""data:image/jpeg;base64,")
' Append the base64 image data to sbHtml.
bdJpg.GetEncodedSb("base64",sbHtml)
sbHtml.Append(""" alt="""" style=""border-width:0px;"" /></body></html>")

Dim json As New Chilkat.JsonObject
json.UpdateString("personalizations[0].to[0].email","matt@chilkat.io")
json.UpdateString("personalizations[0].to[0].name","Matt")
json.UpdateString("from.email","admin@chilkatsoft.com")
json.UpdateString("subject","Test HTML email with images")
json.UpdateString("content[0].type","text/html")
json.UpdateSb("content[0].value",sbHtml)

http.AuthToken = "SENDGRID_API_KEY"

Dim resp As Chilkat.HttpResponse
resp = http.PostJson3("https://api.sendgrid.com/v3/mail/send","application/json",json)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
Else
    Debug.WriteLine("response status code: " & resp.StatusCode)
    ' Display the response.
    ' If successful, the response code is 202 and the response body string is empty.
    ' (The response body string may also be empty for error response codes.)
    Debug.WriteLine(resp.BodyStr)

End If