Access a python class from C#

Grasshopper Developer
,
1

Hey there,

I’m gradually rewriting a Python plugin into C# code. Eventually everything will be native, but for the time being I’d like to find a way of accessing custom Python classes from C#.

Python class goes in as GenericParameter and is referenced in a static GH_ObjectWrapper python variable. I can see all the content in the compiler, but its Value field is not accessible.

Any ideas on how to drill into it?

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2

Once you get the first Value from the GH_ObjectWrapper (which you should be able to access) you might try casting it to a dynamic, and then drilling into its properties from there.
so something like:

GH_ObjectWrapper wrapper = python;
dynamic pythonObject = wrapper.Value;
var geometry = pythonObject.geometry;

etc

not 100% sure this will work without knowing more about your particular case, but it’s worth a try.

2 Likes
3

Awesome @andheum!
The trick was to cast it to a dynamic, previously I was trying to cast to object and kept getting an error, that my object doesn’t contain a definition for ‘geometry’.

Thanks to your help, I can now access all the geometry within my python class directly from another C# component.

    protected override void SolveInstance(IGH_DataAccess DA)
    {
        DA.GetData(0, ref python);

        List<GeometryBase> outputGeo = new List<GeometryBase>();

        dynamic pythonObject = python.Value;

        foreach (var element in pythonObject.geometry["People"][0])
        {
            outputGeo.Add(element);
        }

        DA.SetDataList(0, outputGeo);
    }
1 Like