Python in Dynamo vs GHPython - Revit API

jfreund · August 6, 2021, 4:03pm

Hello,

I am trying to implement some automation with Rhino.Inside.Revit through GHPython to programmatically open a Revit model (Revit 2020). I found a Dynamo Python script at the link below, and it works fine to open a Revit document:

However, when I try to implement this in GHPython, it throws the following error:

Additionally, when I use the CovertUserVisiblePathToModelPath method in GHPython, it returns a FilePath rather than a ModelPath.

Any ideas what the differences are between Dynamo running the script vs GHPython? Any assistance is appreciated!

Thanks,
Joseph

jfreund · August 6, 2021, 7:32pm

I removed the RevitServices and instead used Autodesk.Revit.ApplicationServices to get past the first error.

Here is what I was talking about re: ConvertUserVisiblePathToModelPath

As I understand it, it needs a string as input and would return a modelPath, but instead it is returning a FilePath.
https://www.revitapidocs.com/2020/0776a818-f032-a332-ac59-962953d8493a.htm

Not sure why. If there is a better way to open a Revit model with RiR programmatically, I’d be all ears!

It looks like opening a Revit model is possible via the Document Grasshopper parameter, but I’m not entirely sure how this could be adapted for what I’m trying to do. See the link below, starting line 87:

github.com

mcneel/rhino.inside-revit/blob/1.x/src/RhinoInside.Revit.GH/Parameters/Document.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using Grasshopper.GUI;
using Grasshopper.Kernel;
using Grasshopper.Kernel.Data;
using RhinoInside.Revit.External.DB.Extensions;
using DB = Autodesk.Revit.DB;

namespace RhinoInside.Revit.GH.Parameters
{
  public class Document : PersistentParam<Types.IGH_Document>
  {
    public override Guid ComponentGuid => new Guid("F3427D5C-3793-4E32-B219-8172D56EF04C");
    public override GH_Exposure Exposure => GH_Exposure.quarternary;
    protected override string IconTag => "D";

    public Document() : base("Document", "DOC", "Contains a collection of Revit documents", "Params", "Revit Primitives")
    { }

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Thanks!
Joseph

kike · August 9, 2021, 8:37am

Hi @jfreund,

Revit.ActiveDBApplication from “RhinoInside.Revit” should work.

jfreund · August 9, 2021, 2:37pm

Thank you, @kike!

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