.NET

[#1]

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

[#2 · Accepted solution]

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 
    {
        [CommandMethod("MyDxfOut")]
        public static void RunMyCommand()
        {
            Document dwg = Application.DocumentManager.MdiActiveDocument;
            Editor ed = dwg.Editor;

            PromptSelectionResult res = ed.GetSelection();
            if (res.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n*Cancel*");
                return;
            }

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

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

            
            Autodesk.AutoCAD.Internal.Utils.PostCommandPrompt();
        }

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

            foreach (ObjectId id in entIds)
            { 
                i++;
                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.

HTH.