Xojo Plugin Requires Chilkat v11.7.0+

Embed a QR Code in HTML as a Data URI

See more QR Code Examples

Demonstrates putting a QR code directly into an HTML page or HTML email with no separate image file. The base64 PNG returned by QrCode becomes the src of an img tag as a data URI, which is the MIME type from outputs[0].mimeType followed by the base64 from outputs[0].base64. Xojo Plugin

Dim success As Boolean
success = False

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

Dim json As New Chilkat.JsonObject
success = json.UpdateString("payload.text","https://www.chilkatsoft.com/")
success = json.UpdateInt("render.moduleSize",5)

Dim fmt As New Chilkat.Formats
Dim jsonOut As New Chilkat.JsonObject
success = fmt.QrCode("generate",json,jsonOut)
If (success = False) Then
    System.DebugLog(fmt.LastErrorText)
    Return
End If

//  A data URI has the form  data:<MIME type>;base64,<base64 data>
Dim sbHtml As New Chilkat.StringBuilder
success = sbHtml.Append("<html><body><p>Scan to visit chilkatsoft.com</p><img alt=""QR code"" width=""")
success = sbHtml.AppendInt(jsonOut.IntOf("outputs[0].width"))
success = sbHtml.Append(""" height=""")
success = sbHtml.AppendInt(jsonOut.IntOf("outputs[0].height"))
success = sbHtml.Append(""" src=""data:")
success = sbHtml.Append(jsonOut.StringOf("outputs[0].mimeType"))
success = sbHtml.Append(";base64,")
success = sbHtml.Append(jsonOut.StringOf("outputs[0].base64"))
success = sbHtml.Append("""></body></html>")

success = sbHtml.WriteFile("qa_output/qr_page.html","utf-8",False)
If (success = False) Then
    System.DebugLog(sbHtml.LastErrorText)
    Return
End If

System.DebugLog("image: " + Str(jsonOut.IntOf("outputs[0].width")) + " x " + Str(jsonOut.IntOf("outputs[0].height")) + " pixels")
System.DebugLog("HTML length: " + Str(sbHtml.Length))

//  The page, as a browser shows it:

//  

//  Sample output:

//  image: 185 x 185 pixels
//  HTML length: 1211