VB.NET

Read/Write JSON with Binary Data such as JPEG Files

See more JSON Examples

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image. VB.NET

Dim success As Boolean = False

' First load a small JPG file..
Dim bd As New Chilkat.BinData

success = bd.LoadFile("qa_data/jpg/starfish20.jpg")
' Assume success, but your code should check for success..

' Create JSON containing the binary data in base64 format.
Dim json1 As New Chilkat.JsonObject
json1.UpdateBd("starfish","base64",bd)

Dim jsonStr As String = json1.Emit()
Debug.WriteLine(jsonStr)

' Here's the output:
' {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

' Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
Dim json2 As New Chilkat.JsonObject
json2.Load(jsonStr)

' Get the binary bytes.
Dim bd2 As New Chilkat.BinData
json2.BytesOf("starfish","base64",bd2)

' Save to a file.
success = bd2.WriteFile("qa_output/starfish20.jpg")

Debug.WriteLine("Success.")