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Geographic Information Systems

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  • You might be able to add a GPMessage in the arcpy script and access it via gpMessages out variable. Not sure about it, but it would be the process I would start investigating. You would need to do more work parsing the messages, but it might facilitate communication between the two. Commented Jun 17, 2016 at 12:13
  • @Branco Thank you for this hint! It feels a little bit like a hack but it might work for simple return parameters. Commented Jun 20, 2016 at 7:45
  • @Branco Do you know how to add a message in the python code, so that it could be retrieved in the GPMessages variable in the C# code? I have tried {{arcpy.AddMessage}} but with no luck. Commented Jun 20, 2016 at 15:26
  • I am not really sure. I saw pieces here and there that say it may not actually support passing messages like that. I don't have a GIS system nearby to test with. It may be beneficial to take one of the methods in my answer and create a generic communication service for this and future projects. Commented Jun 20, 2016 at 16:26
  • I have spend all the day, finding a way to populate the IGPMessages object, but with no luck. After the call of InvokeModal the variable is always null. Commented Jun 21, 2016 at 12:31