topic Re: Problem creating layer in .NET Forum

Problem creating layer

Anonymous — Sun, 15 Nov 2015 20:15:52 GMT

Hello guys I really need some help, I'm trying to create a new layer seting its name through a windows form, but my code always break, for example, this code works:

 LayerTable lT = tr.GetObject(bd.LayerTableId, OpenMode.ForRead) as LayerTable;
                    string sLayerName = "StringTest";

                    if (lT.Has(sLayerName) == false) 
                    {
                        LayerTableRecord lTR = new LayerTableRecord();
                        lTR.Color = Autodesk.AutoCAD.Colors.Color.FromColorIndex(ColorMethod.ByAci, 10);
                        lTR.Name = sLayerName;
                        
                        lT.UpgradeOpen();

                        lT.Add(lTR);
                        tr.AddNewlyCreatedDBObject(lTR, true);

                    }

but when I do some thing like:

 
string name = textBox.Text;

LayerTable lT = tr.GetObject(bd.LayerTableId, OpenMode.ForRead) as LayerTable;
                    string sLayerName = name;

                    if (lT.Has(sLayerName) == false) // Verify if this layer is already created
                    {
                        LayerTableRecord lTR = new LayerTableRecord();
                        lTR.Color = Autodesk.AutoCAD.Colors.Color.FromColorIndex(ColorMethod.ByAci, 10);
                        lTR.Name = sLayerName;
                        
                        lT.UpgradeOpen();

                        lT.Add(lTR);
                        tr.AddNewlyCreatedDBObject(lTR, true);

                    }

Making the user set the name for the future layer, my code breaks, help me guys I have no idea how to solve this.

Re: Problem creating layer

Anonymous — Sun, 15 Nov 2015 22:03:15 GMT

And to be a little bit more expecific I'm getting an exception when I'm trying work with that name variable.

Re: Problem creating layer

kerry_w_brown — Mon, 16 Nov 2015 00:26:57 GMT

You'll need to be more explicit about the location and message of the exception.

Is the layer code works stand alone why do you think it is the cause of the error ??

Isn't it more likely that the Form or the assignment to the name variable is the issue ?

How are you calling the Form ?

Is the command method that instantiates the form is static or not ?

What is the value of name if you add a WriteLine (or an Alert) in place of the layer making code call ?

Regards,

Re: Problem creating layer

BKSpurgeon — Mon, 16 Nov 2015 01:02:36 GMT

please highlight the exact line that the code is breaking and what the exception is.

I can't see a reason why it should fail.

Perhaps check what the name string is set to, by adding a break point and checking the watch window to see what the name variable is actually equal to.

Re: Problem creating layer

Anonymous — Mon, 16 Nov 2015 09:40:57 GMT

Thanks guys, so here it is, my code is something like:

 public string roomName = "";

public void setCurrentRoomName(string CurrentName)
 { 
 roomName = CurrrentName;
 }


[CommandMethod("Walls")]
        public void setWalls()
        {
             if (roomName == "")
             {                 
                 Form8 formName = new Form8(this);
                 formAmbientName.Show();
             }       
             else
            {               
                Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
                Editor ed = doc.Editor;
                Database bd = doc.Database;
                Transaction tr = bd.TransactionManager.StartTransaction();
                ObjectIdCollection ids = new ObjectIdCollection();
                
                using (tr)
                {
                    BlockTable bT;
                    bT = tr.GetObject(bd.BlockTableId, OpenMode.ForRead) as BlockTable;

                    BlockTableRecord btR;
                    btR = tr.GetObject(bT[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
                   

                    LayerTable lT = tr.GetObject(bd.LayerTableId, OpenMode.ForRead) as LayerTable;
                    string sLayerName = roomName;
                    
                    if (lT.Has(sLayerName) == false)
                    {
                        LayerTableRecord lTR = new LayerTableRecord();
                        lTR.Color = Autodesk.AutoCAD.Colors.Color.FromColorIndex(ColorMethod.ByAci, 10);
                        lTR.Name = sLayerName;                        
                        lT.UpgradeOpen();
                        lT.Add(lTR);
                        tr.AddNewlyCreatedDBObject(lTR, true);
                    }                   
                                 
                    PromptPointResult ppR;
                    PromptPointOptions ppO = new PromptPointOptions("");
                    Point2dCollection p2dC = new Point2dCollection();

                    ppO.Message = "Specify the first point of the wall: ";

                    ppR = doc.Editor.GetPoint(ppO);
                    p2dC.Add(new Point2d(ppR.Value.X, ppR.Value.Y));
                    Point2d pontoInicial = new Point2d(ppR.Value.X, ppR.Value.Y);

                    if (ppR.Status == PromptStatus.Cancel) return;
                    int auxStartWhile = 1;

                    while (pontoInicial != new Point2d(ppR.Value.X + auxStartWhile, ppR.Value.Y))
                    {
                        ppO.Message = "Specify next point of the wall: ";
                        ppO.UseBasePoint = true;
                        ppO.BasePoint = ppR.Value;
                        ppR = doc.Editor.GetPoint(ppO);
                        p2dC.Add(new Point2d(ppR.Value.X, ppR.Value.Y));
                       
                        auxStartWhile = 0;
                    }
                    using (SpecialBuildingWall pL = new SpecialBuildingWall())
                    {
                        for (int i = 0; i < (p2dC.Count); i++) // that -1 exclude the point (0,0) that is created when click esc 
                        {
                            pL.AddVertexAt(i, p2dC[i], 0, 0, 0);  // add points to the polyline
                        }
                        pL.Layer = sLayerName;
                        btR.AppendEntity(pL);
                        tr.AddNewlyCreatedDBObject(pL, true);

                        SpecialBuildingWall novoElementoEspecial = new SpecialBuildingWall(wallHeightParam, pL.Length, pL.Handle.ToString());
                        listadeRooms.Add(novoElementoEspecial);
                        listadeRoomsAtualizada.Clear();

                        for (long i = 0; i < bd.Handseed.Value; i++)
                        {
                            ObjectId id = ObjectId.Null;
                            bd.TryGetObjectId(new Handle(i), out id);
                            if (id != ObjectId.Null && !id.IsErased)
                                ids.Add(id);
                        }
                        foreach (ObjectId id in ids)
                        {
                            DBObject obj = tr.GetObject(id, OpenMode.ForRead, false) as DBObject;
                            if (obj.GetRXClass().DxfName == "LWPOLYLINE")
                            {
                                object valueOfHandle_ = null;
                                valueOfHandle_ = obj.GetType().GetProperty("Handle").GetValue(obj, null);

                                for (int i = 0; i < listadelinhasespeciais.Count; i++)
                                {
                                    ed.WriteMessage(valueOfHandle_.ToString());
                                    if (listadeRooms[i].handle_.ToString() == valueOfHandle_.ToString())
                                    {
                                        auxiliarIndex = i;
                                        listadeRoomsAtualizada.Add(listadeRooms[i]);
                                        //listadelinhasespeciaisAtualizada.Add(listadelinhasespeciais[i]);                                        
                                    }
                                }
                            }
                        }                                             
                        Form9 roomComponentsForm = new Form9(roomName, this, novoAmbiente);
                        roomComponentsForm.Show();                        
                    }
                    tr.Commit();
                }
            } 
        }

And the code of the form8 is:

 private void button1_Click(object sender, EventArgs e)
        {            
                instanciaDoMyCommands.setCurrentRoomName(textBox.Text);               
               Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.SendStringToExecute("Walls ", true, false, true);
                this.Close();          
        }

The exception message apears after the form8 desapears.

Re: Problem creating layer

SENL1362 — Mon, 16 Nov 2015 09:50:42 GMT

Did you Lock the document before altering the Document/Database

Re: Problem creating layer

kerry_w_brown — Mon, 16 Nov 2015 11:04:40 GMT

pericles-terto,

How about you help others to help you.

Could you attach a zipped solution containing the bare minimun required to demonstrate your issue.

That is the only way someone can test your code without guessing about the stuff you don't show.

Regards,

Re: Problem creating layer

Anonymous — Sat, 21 Nov 2015 17:09:02 GMT

I finally found the solution for my problem guys, thanks for you all that tried helping me. really, thank you very much.

Re: Problem creating layer

Jeff_M — Sat, 21 Nov 2015 21:00:48 GMT

How about posting what you found to be the solution so others may benefit in the future?

Re: Problem creating layer

Anonymous — Sun, 22 Nov 2015 18:33:08 GMT

I'm sorry, I wasn't at my computer to send u my solution before, well, my program was verifying the already created layer names two times

if (lT.Has(sLayerName) == false)

one into the same commandmethod as standard, and other into another external method called from the form that the user types the new layer name, I removed the verification of the other method and then the program worked fine.