Help with binary data to image IronPython script

[Todd Johnson 2]

I modified the code in the article below to read data from a BLOB document property but I get an "Invalid Parameter" error at the Image.FromStream(stream) line.

The BLOB in question is a Bitmap saved as PNG image type that is written to the document property by a similar IronPython script. The image is correctly rendered as a label in a text area.

https://community.spotfire.com/s/article/How-to-read-Binary-column-values-and-save-as-images-TIBCO-Spotfire-Using-IronPython-Scripting

from Spotfire.Dxp.Data import *

from System.IO import *

from System.Drawing import *

from System.Drawing.Imaging import *

blob = Document.Properties["myImage"]

stream=blob.GetByteStream()

img=Image.FromStream(stream)

#img=Image.FromStream(stream,0,1)

[Andrew Berridge]

Hi there - do you have a simple test file that we can use to experiment with?

I have some ideas.... you can email me at dr@spotfire.com and I'll provide you with a way of sending it over.

Thanks,

Andrew (Spotfire Data Science)

[Todd Johnson 2]

Thanks for reaching out. After posting this question, I discovered that I was attempting to run the script while the doc property (blob) was empty, hence the invalid parameter error. When the doc property was reloaded with an image, the code worked.