How to export pipe using CustomExporter?

[techXMKH9]

I am a simple pipe in my Model and I am using CustomExporter to export the model into obj format.

But OnPolymesh is never triggered.

How can I export the pipe's geometry and material?

[jeremytammik]

This other post today reports a different problem, and proves that there is no problem of the kind you describe exporting pipe geometry:

https://forums.autodesk.com/t5/revit-api-forum/pipes-geometry-through-exportcontext/td-p/9071902

Are you sure you are running your custom exporter in a view that is set up to display pipes at all?

You may be running into a trivial issue with your view settings.

[techXMKH9]

I do not know what I'm doing wrong.

      CustomExporter expr_DA = new CustomExporter(document, new SentioExporter());
            expr_DA.IncludeGeometricObjects = false;
            expr_DA.ShouldStopOnError = false;
#if DEBUG2019 || RELEASE2019
            View3D view3D = Utils.Find3DView(document, "3D View 1");
            expr_DA.Export(view3D);
#endif

using Autodesk.Revit.DB;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Solutionario.Sentio
{
    class SentioExporter : IExportContext
    {
        public void Finish()
        {
        }

        public bool IsCanceled()
        {
            return false;
        }

        public RenderNodeAction OnElementBegin(ElementId elementId)
        {
            return RenderNodeAction.Proceed;
        }

        public void OnElementEnd(ElementId elementId)
        {

        }

        public RenderNodeAction OnFaceBegin(FaceNode node)
        {
            return RenderNodeAction.Proceed;
        }

        public void OnFaceEnd(FaceNode node)
        {

        }

        public RenderNodeAction OnInstanceBegin(InstanceNode node)
        {
            return RenderNodeAction.Proceed;
        }

        public void OnInstanceEnd(InstanceNode node)
        {

        }

        public void OnLight(LightNode node)
        {

        }

        public RenderNodeAction OnLinkBegin(LinkNode node)
        {
            return RenderNodeAction.Proceed;
        }

        public void OnLinkEnd(LinkNode node)
        {

        }

        public void OnMaterial(MaterialNode node)
        {

        }

        public void OnPolymesh(PolymeshTopology node)
        {

        }

        public void OnRPC(RPCNode node)
        {

        }

        public RenderNodeAction OnViewBegin(ViewNode node)
        {
            return RenderNodeAction.Proceed;
        }

        public void OnViewEnd(ElementId elementId)
        {

        }

        public bool Start()
        {
            return true;
        }
    }
}

I've attached the model also. It has a view named "3D View 1".

[techXMKH9 · Accepted solution]

Since I am new to Revit, I didn't know that view's leveldetail has to be set to FINE to export pipe.

I hope it will help somebody save time.

[jeremytammik]

Congratulations on solving this and thank you for letting us know!