MAPCREATEFEATUREFROMGEOMETRY

[svucic]

Hi everyone.

Could someone please help me. 

I need to make a new feature from a polyline using C#.NET.

I'm used to autolisp programing and new to .NET.

So far I managed to get a ss set of polylines that I need and get the area and parcel number (mtext) inside the polyline. 

Now I need to make a new feature from the polyline geometry in the OBData Table (.sdf) and fill the table with the values "area" and "parcel number".

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

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

[assembly: CommandClass(typeof(AC1.Class1))]

namespace AC1
{
    public class Class1
    {
        [CommandMethod("PP")]

        public static void FilterSelectionSet()
        {
            // Open the doc and get the current document editor
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Editor acDocEd = Application.DocumentManager.MdiActiveDocument.Editor;
            Database acCurDb = acDoc.Database;

            /////////////////////// SSET 1 /////////////////////////////////
            // Create a TypedValue array to define the filter criteria
            TypedValue[] acTypValAr = new TypedValue[2];
            acTypValAr.SetValue(new TypedValue((int)DxfCode.LayerName, "0"), 0);
            acTypValAr.SetValue(new TypedValue((int)DxfCode.Start, "LWPOLYLINE"), 1);

            // Assign the filter criteria to a SelectionFilter object
            SelectionFilter acSelFtr = new SelectionFilter(acTypValAr);
            PromptSelectionResult psr = acDocEd.SelectAll(acSelFtr);
            SelectionSet acSet = psr.Value;
            //acDocEd.WriteMessage("Number of selected entities is {0}.", acSet.Count.ToString());
            //______________________________________________________________________


            //Start transaction and read ObjectId 
            using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
            {
                // Open the Block table for read
                BlockTable acBlkTbl;
                acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
                OpenMode.ForRead) as BlockTable;

                // Open the Block table record Model space for read
                BlockTableRecord acBlkTblRec;
                acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
                OpenMode.ForRead) as BlockTableRecord;


                ObjectId[] idcoll = acSet.GetObjectIds();
               
                foreach (ObjectId mt in idcoll)
                {
                    DBObject obj = acTrans.GetObject(mt,OpenMode.ForRead);
                    Polyline lwp = obj as Polyline;

                    double area = lwp.Area;
                    acDoc.Editor.WriteMessage("\nArea :" + area.ToString());

                    Point3dCollection pt3d = new Point3dCollection();
                    for (int nCnt = 0; nCnt < lwp.NumberOfVertices; nCnt++)
                    {
                        pt3d.Add(lwp.GetPoint3dAt(nCnt));
                    }

                    ////////////////////// SSET 2 //////////////////////////////////
                    // Create a TypedValue array to define the filter criteria
                    TypedValue[] acTypValAr1 = new TypedValue[1];
                    acTypValAr1.SetValue(new TypedValue((int)DxfCode.Start, "MText"), 0);

                    // Assign the filter criteria to a SelectionFilter object
                    SelectionFilter acSelFtr1 = new SelectionFilter(acTypValAr1);
                    PromptSelectionResult psr1 = acDocEd.SelectWindowPolygon(pt3d, acSelFtr1);
                    SelectionSet acSet1 = psr1.Value;
                    //______________________________________________________________________


                    ObjectId[] idmtxt = acSet1.GetObjectIds();
                    int mtcoll = idmtxt.Length;

                    foreach (ObjectId mtid in idmtxt)
                    {
                        DBObject obj1 = acTrans.GetObject(mtid, OpenMode.ForRead);
                        MText mtxt1 = obj1 as MText;
                        string mtext1 = mtxt1.Text;
                        acDoc.Editor.WriteMessage("\nMText:" + mtext1);
                    }

                    if (lwp != null)
                    {
                        // Use a for loop to get each vertex, one by one
                        int vn = lwp.NumberOfVertices;
                        acDoc.Editor.WriteMessage("\nNumber of vertices:" + vn.ToString());
                        for (int i = 0; i < vn; i++)
                        {
                            // Could also get the 3D point here
                            Point2d pt = lwp.GetPoint2dAt(i);
                            List<Point2d> pts = new List<Point2d> { };
                            pts.Add(pt);

                            double ptX = pt.X;
                            double ptY = pt.Y;

                            //List<double> ptss = new List<double> {};
                            //ptss.Add(pt.); 
                            //ptss.Add(pt.ToArray);


                           // acDoc.Editor.WriteMessage("\nVertex :" + string.Format("{0}", i) + pt.ToString());
                           // acDoc.Editor.WriteMessage("\nVertex X :" + ptX.ToString());
                           // acDoc.Editor.WriteMessage("\nVertex Y :" + ptY.ToString());
                        }

                    }

                }
            }
        }
    }
}

[hence_the_name · Accepted solution]

Hi,

if you are new to .net then you are also new to Map FDO API as it is not available for Lisp.

You will find tutorials for Map FDO .net API - here is one link:

http://adndevblog.typepad.com/infrastructure/2013/02/autocad-map-3d-api-training-content-part-1.html

Map SDK used to come with Developer samples - one sample covers your question - have a look:

...\Map ObjectARX SDK 2013\Map Samples\Platform\Bridge\Bridge.csproj

This sample demonstrates:
-   How to convert AcDbEntity to MgGeometry, and add to layer as a feature.
-   How to convert MgGeometry to AcDbEntity, and delete the feautre from layer

Good luck, Rob

[svucic]

Thank you very much for your kind response. I will check the sample and tutorials.