topic Re: Converting STEP files to DWG pogramatically (C#) in AutoCAD Forum

Converting STEP files to DWG pogramatically (C#)

Anonymous — Mon, 21 Sep 2015 14:08:54 GMT

Hello,

I'm trying to import a STEP (.stp) into AutoCAD 2016 and save it as DWG, which works as a user.

The main problem is about emulating the "import" command.

I didn't find any way to import in managed code, so I tried interop:

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.Windows;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using AcadApp = Autodesk.AutoCAD.ApplicationServices.Application;
using Autodesk.AutoCAD.Interop;
using AcadInterop = Autodesk.AutoCAD.Interop.AcadApplication;
using System.Runtime.InteropServices;
using Autodesk.AutoCAD.Geometry;

[CommandMethod("steptodwg", (CommandFlags.Modal | CommandFlags.Session))]
public void Convert()

{

try
{

Document doc = AcadApp.DocumentManager.MdiActiveDocument;

AcadDocument comDoc = (Autodesk.AutoCAD.Interop.AcadDocument)doc.GetAcadDocument();

double myScale = 1;

double[] ptArray = { 1, 1, 0 };

comDoc.Import(@"C:\test.stp", (object)ptArray, myScale);

}

.....

The message is "Invalid argument".

I suppose the argument causing problems is the point of insertion, but I can't say for sure.

Thanks

Re: Converting STEP files to DWG pogramatically (C#)

ampster40 — Mon, 21 Sep 2015 14:56:25 GMT

sorry I cannot assist with the code, just providing the simple fact that AutoCAD by itself cannot work with step files. If you want to work with step files in Acad, you will also need to have AutoCAD Mechanical installed. Perhaps the code you're working on will need to be modified to work in conjunction with Acad Mech. HTH

Re: Converting STEP files to DWG pogramatically (C#)

ampster40 — Mon, 21 Sep 2015 14:57:44 GMT

also, instead of working with the "import" command, try utilizing the "stepin" command.

Re: Converting STEP files to DWG pogramatically (C#)

Anonymous — Mon, 21 Sep 2015 15:07:22 GMT

Thanks for your answers, i didn't know about mechanical, but i don't have it and it works (as a user).

I don't have access to the "stepin" command"n what does it do? Is it only in mechanical?

Re: Converting STEP files to DWG pogramatically (C#)

JDMather — Mon, 21 Sep 2015 15:19:08 GMT

@ampster40 wrote:
.... the simple fact that AutoCAD by itself cannot work with step files. If you want to work with step files in Acad, you will also need to have AutoCAD Mechanical installed.

Incorrect information.
Vanilla AutoCAD has been able to import STEP files for at least a couple of releases now.

Re: Converting STEP files to DWG pogramatically (C#)

Patchy — Mon, 21 Sep 2015 15:16:26 GMT

Can it be done? Read this from Autodesk

http://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoCAD-Core/files/GUID-81A5EE76-39A7-40A4-A5C5-E4921C03B33A-htm.html

Look at where it said STEP.

Re: Converting STEP files to DWG pogramatically (C#)

Anonymous — Mon, 21 Sep 2015 15:21:43 GMT

@ampster40 wrote:
sorry I cannot assist with the code, just providing the simple fact that AutoCAD by itself cannot work with step files. If you want to work with step files inAcad, you will also need to have AutoCAD Mechanical installed. Perhaps the code you're working on will need to be modified to work in conjunction withAcadMech.HTH

This is so wrong.....You can import step files with vanilla AutoCAD.

Re: Converting STEP files to DWG pogramatically (C#)

ampster40 — Mon, 21 Sep 2015 15:24:19 GMT

Tks JD, you are correct. It only handles 1/2 of the step file situation. It cannot export but it can import. Sorry for the bad info.

Re: Converting STEP files to DWG pogramatically (C#)

Anonymous — Mon, 21 Sep 2015 15:28:41 GMT

As I said in the 1st post, I could do it as a user, so that's not the problem at all.

No offense, but I'm looking for developper's advices here.

Thanks for your answers anyway.

Re: Converting STEP files to DWG pogramatically (C#)

Patchy — Mon, 21 Sep 2015 15:31:35 GMT

Then you need to go to proper group, not autocad users group.

Dig in here:

http://forums.autodesk.com/t5/custom/page/page-id/Discussions-Page

Re: Converting STEP files to DWG pogramatically (C#)

Anonymous — Mon, 21 Sep 2015 15:31:41 GMT

@Anonymous wrote:
As I said in the 1st post, I could do it as a user, so that's not the problem at all.
No offense, but I'm looking for developper's advices here.
Thanks for your answers anyway.

Maybe look in the proper forum....

http://forums.autodesk.com/t5/autocad-customization/ct-p/AutoCADTopic1