Recalculate solution without redrawing canvas

[AndersDeleuran]

This topic should help:

How can I get a Number Slider object and set a value?

FixValue is not the right method to call, that method merely fixes the assigned value (i.e. it makes sure it doesn’t exceed the limits and adheres to the correct rounding scheme). The problem you have is actually three-fold: Get references to all sliders you want to change. Change all slider values. Run a new solution. I don’t know how you define which sliders are relevant to you, so I cannot much comment yet on item #1. There are four ways in which you can change the slider value, you’ll h…

And while it’s meant for GHPython users, this might help too:

The only safe way to Update Sliders in GhPython

Over the years, there have been lots of threads here and on the old Grasshopper forum that deal with setting slider values in Grasshopper. They all have some advantages and disadvantages, but they have something in common: they too often end up breaking the Grasshopper SDK rule “never edit values while the definition is running”. This thread shows a way of fixing that. This is a Rhino-6-only possibility, because this feature is new in Rhino 6. By overriding the Component Context menu, we can se…

Also these methods are available. I’ve never used them, but they might be relevant: