Visual Basic 6.0

Insert PDF as Base64 into XML, then Extract back to PDF File

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Demonstrates how to insert any file into XML using base64 encoding, and then extract back to the original file. This example embeds a PDF in the XML, but the type of file does not matter. It can be any type of file. Visual Basic 6.0

Dim success As Long
success = 0

' Load our PDF file.
Dim bd As New ChilkatBinData
success = bd.LoadFile("qa_data/helloWorld.pdf")
If (success <> 1) Then
    Debug.Print "Failed to load PDF file."
    Exit Sub
End If

' Load the following XML:
' 
' <?xml version="1.0" encoding="utf-8" ?>
' <something>
'     <xyz>
'         <abc123>A base64 encoded PDF file will be inserted under this node.</abc123>
'     </xyz>
' </something>

Dim xml As New ChilkatXml
success = xml.LoadXmlFile("qa_data/xml/xmlToContainPdf.xml")
If (success <> 1) Then
    Debug.Print "Failed to load XML file."
    Exit Sub
End If

' Insert the PDF into the XML.
xml.NewChild2 "xyz|pdfData",bd.GetEncoded("base64")

' Show the new XML:
Debug.Print xml.GetXml()

' The XML now looks like this:
' <?xml version="1.0" encoding="utf-8" ?>
' <something>
'     <xyz>
'         <abc123>A base64 encoded PDF file will be inserted under this node.</abc123>
'         <pdfData>JVBERi0xL ... UlRU9GCg==</pdfData>
'     </xyz>
' </something>

' To extract the PDF data out and restore the PDF file:
Dim bd2 As New ChilkatBinData
success = bd2.AppendEncoded(xml.GetChildContent("xyz|pdfData"),"base64")
success = bd2.WriteFile("qa_output/helloWorld.pdf")

Debug.Print "Success."