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I have an ArcGIS custom IGPFunction tool. I want to use the GP progress dialog not the progress bar at the bottom of the ArcGIS 10 window as I don't want people to interact with the map whilst it's processing.

In the Execute method you have an instance of ITrackCancel but I can't work out how to show the default GP progress dialog from there. I have this as code at the moment but it still doesn't show the dialog. Any ideas?

        IStepProgressor pStepPro = (IStepProgressor)TrackCancel;
        pStepPro.MinRange = 0;
        pStepPro.StepValue = 1;
        pStepPro.Message = "Starting Import...";
        pStepPro.Position = 0;


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+1 - I'd like to know the answer to this, as well. Currently, I implement a backgroundworker and disable certain buttons in a winform with little way to display any sort of tool progress. When the tool can take over an hour, it would be great to show the normal progress dialog. I wonder if an answer could be extended to standalone tools. – Nathanus Dec 20 '11 at 17:10
up vote 2 down vote accepted

This is built-in to the Geoprocessing framework. If you have background processing turned on, you shouldn't block the UI. At all. It violates the principles of Geoprocessing -- what if you run the tool as a scheduled task, or in modelbuilder, or from Python?

If you absolutely HAVE to, two things:

I recommend checking if you're in a desktop application before bringing up a dialog by trying to create the AppRef class first -- if that fails, don't pop up a dialog.

But really, you shouldn't be second-guessing the user's preference for background/foreground processing. I'll assume in good faith you really do need this.

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Yes I do need to do this. The progress dialog doesn't work for me, nothing displays. Strangely IGPUtilities2:InApplication is returning false. Even though it's being run from ArcToolbox. – Rob Jan 11 '12 at 8:49
Wow, that sounds like a broken install to me. – Jason Scheirer Jan 11 '12 at 16:15

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