algorithmic modeling for Rhino
Implement .dll (VB.NET) in GH Python
I tried to implement a self written .dll (VB.NET) in Grasshopper Python and got following error.
Runtime error (ArgumentTypeException): HelloWorld() takes exactly 1 argument (0 given)
In my mind the HelloWorld function should need no argument but return the string “Hello World”.
Help on method-descriptor HelloWorld
| HelloWorld(...)
| HelloWorld(self: MyClassLibrary) -> str
Can anybody help?
Sourcecode MyClassLibrary.vb:
Simple Class Library Project in Visual Studio 2015
Function has no parameters and Returns String „Hello World“
Compiled *.dll works fine in other Visual Studio Projects as reference
Project Properties
Checkbox „COM Interop“ has no impact
Views: 607
- Attachments:
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MyClassLibrary.dll, 9 KB
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Replies to This Discussion
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Permalink Reply by Giulio Piacentino on
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Hi Clemens,
that function (in VB) is not static, so it's an instance method.
In turn, instance methods need a "self" instance in Python. You need to first instantiate MyClassLibrary() by calling its constructor...
ghw_instance = ghw()
#then
ghw_instance.HelloWorld()
Alternatively, you could mark the method as static.Giulio
--
Giulio Piacentino
for Robert McNeel & Associates
giulio@mcneel.com -
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Permalink Reply by Clemens Huber on
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Hi Giulio,
thanks for your quick answer and help! Now the method works.
Clemens
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