Active Member
Posts: 6
Registered: ‎09-25-2012
Message 1 of 2 (232 Views)
Accepted Solution

Outputting a dxf file from an active drawing.

232 Views, 1 Replies
10-18-2012 02:52 PM

I have several closed ployline shapes  in a particular layer, I need to know a way to:


a) pick all the entites on that layer

b) export to a dxf file each individual entity on the layer (yes, each entity saved to a separate dxf)


Any help would be great. I am almost positive I can answer 'a' on my own using an object collection and a conditional statement? I am really more interested in how to export an entity from current open drawing to a dxf file in .net

*Expert Elite*
Posts: 987
Registered: ‎04-27-2009
Message 2 of 2 (208 Views)

Re: Outputting a dxf file from an active drawing.

10-19-2012 03:22 PM in reply to: baw6718

Try this code:


using System.IO;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;

[assembly: CommandClass(typeof(DxfOut.MyCommands))]

namespace DxfOut
    public class MyCommands 
        public static void RunMyCommand()
            Document dwg = Application.DocumentManager.MdiActiveDocument;
            Editor ed = dwg.Editor;

            PromptSelectionResult res = ed.GetSelection();
            if (res.Status != PromptStatus.OK)

            string folderPath = @"C:\Temp\ExportedFiles";

                ExportEntityToDxf(dwg.Database, res.Value.GetObjectIds(), folderPath);
                ed.WriteMessage("\nSelected entities exported");
            catch (System.Exception ex)
                ed.WriteMessage("\nError: {0}", ex.ToString());


        private static void ExportEntityToDxf(
            Database sourceDB, ObjectId[] entIds, string folderName)
            int i=0;

            foreach (ObjectId id in entIds)
                string fileName = 
                    folderName + "\\Test" + i + "_" + id.ObjectClass.DxfName + ".dxf";

                if (File.Exists(fileName)) File.Delete(fileName);

                using (Database db = new Database(true, true))
                    ObjectIdCollection ids = new ObjectIdCollection(new ObjectId[]{id});
                    sourceDB.Wblock(db, ids, Point3d.Origin, DuplicateRecordCloning.Ignore);
                    db.DxfOut(fileName, 16, DwgVersion.Current);

 I use AutoCAD2012. I started a drawing, drew a few entities (lines, circles...), placed them in different layers, colors. Then run the command "MyDxfOut". I ended up with a bunch of *.dxf files in C:\temp folder, which I opened in AutoCAD, and saw each Dxf file has a single entity with its layer/color being the same as the source entity.



Are you familiar with the Autodesk Expert Elites? The Expert Elite program is made up of customers that help other customers by sharing knowledge and exemplifying an engaging style of collaboration. To learn more, please visit our Expert Elite website.
Need installation help?

Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.