topic Re: Getting the coordinate of the lastly appended(added) point object in .NET Forum

Getting the coordinate of the lastly appended(added) point object

Anonymous — Thu, 03 May 2012 05:02:56 GMT

Hi,

I am trying to get the coordinate of the lastly appended(added) point object.

It seems like I need to use "ObjectAppended" event.

However, when the event is triggred, it looks like the sender object is "Database" (not Point object).

How could I retrieve the point object therefore the coordinates of the point using "Database" (sender object)?

(explaination with C# code would be much more thanksful)

Jake.

Re: Getting the coordinate of the lastly appended(added) point object

Anonymous — Thu, 03 May 2012 06:52:09 GMT

I encountered with another problem.

If I use "ObjectAppended" event, I cannot get the coordinates value as a return value.

I need the coordinate value in order to manipulate some other variables.

How can I approach this problem?

Re: Getting the coordinate of the lastly appended(added) point object

Hallex — Thu, 03 May 2012 10:06:06 GMT

Here is a sample code, change to your suit

        [CommandMethod("huh")]
        public void AddPointEvents()
        {
            // Get the current document and database, and start a transaction
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            DBPoint dpoint = null;
            db.ObjectAppended += new ObjectEventHandler(db_ObjectAppended);
            Editor ed=doc.Editor;
          
                try
                {
                      using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                    // Open the current space for write
                    BlockTableRecord btr;
                    btr = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
                    Point3d pt;
                    PromptPointResult pres;
                    pres= ed.GetPoint("\nPick a point: ");
                    if (pres.Status != PromptStatus.OK) return;
                   
                    // Create a point
                      //  pres = ed.GetPoint("\nPick a point: ");
                     pt = pres.Value;
                     dpoint = new DBPoint();
                     dpoint.Position = pt;//<-- position changed separatelly to call db.ObjectAppended event
                     
                    // Add the new point to the block table record and the transaction
                    btr.AppendEntity(dpoint);
                    tr.AddNewlyCreatedDBObject(dpoint, true);
                    
                    // Save the new object to the database
                    tr.Commit();
                    db.ObjectAppended -= new ObjectEventHandler(db_ObjectAppended);
                }
                }
                catch (System.Exception ex)
                {
                    ed.WriteMessage(ex.Message+"\n" + ex.StackTrace);
                }
                finally
                {
                    
                }
                                  
            }
    
        public  void db_ObjectAppended(object sender, ObjectEventArgs e)
        {
            // Get the current document and database, and start a StartOpenCloseTransaction
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            using (Transaction tr = db.TransactionManager.StartOpenCloseTransaction())
            {
                try
                {
                    DBObject dbo = e.DBObject;
                    DBPoint dpoint = dbo as DBPoint;
                    Point3d ins = dpoint.Position;

                    Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage
                        ("\nCoordinates:\tX = {0}; Y = {1}; Z = {2}", ins.X, ins.Y, ins.Z);
                }
                catch (System.Exception ex)
                {
                    Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor.WriteMessage
                        (ex.Message + "\n" + ex.StackTrace);
                }
                tr.Commit();
            }
        }

~'J'~

Re: Getting the coordinate of the lastly appended(added) point object

Alfred.NESWADBA — Thu, 03 May 2012 20:29:21 GMT

Hi,

it may not work for your task, it's not really what you asked for, but it may also be what you may search for and so just to be mentioned:

Sysvar LASTPOINT (>>>details<<<)

- alfred -