CHnage DBText Layer

[Anonymous]

I need to create a new layer named "Test" and change the already text layer to "Test" and off the layer "Test". I need to check whether that "Test" layer is existing or not. If not the layer should not be created. Can anyone please help me? Thank you.

[Anonymous]

"¿Que?"

using (Transaction myTrans =dbTransactionManager.StartTransaction())
                    {

LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId,OpenMode.ForRead);

LayerTableRecord layerId=db.clayer; 

if (lt.Has("Test"))

{

      layerId= (LayerTableRecord)tr.GetObject(lt["Test"],OpenMode.ForRead);

}

else

{

    lt.UpgradeOpen();

     layerId=new LayerTableRecord();
                lt.Add(layerId);
                layerId.Name = "Test";
                layerId.Color = Color.FromColorIndex(ColorMethod.ByAci, 1);

       tr.AddNewlyCreatedDBObject(layerId,true);

}      

...

aEntity.LayerId = layerID

}

[Anonymous]

It is not accepting layerId in the below line, aEntity.LayerId = layerID as layerId should be of ObjectId datatype.

[Anonymous · Accepted solution]

Sorry about the error in the previous sample.

            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;

            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                BlockTable tb = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
                BlockTableRecord ms = (BlockTableRecord)tr.GetObject(tb[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                LayerTable lt = (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);

                LayerTableRecord testLy = null;
                if (lt.Has("Test"))
                {
                    testLy = (LayerTableRecord)tr.GetObject(lt["Test"], OpenMode.ForRead);
                }

                else
                {
                    lt.UpgradeOpen();

                    testLy = new LayerTableRecord();
                    lt.Add(testLy);
                    testLy.Name = "Test";

                    tr.AddNewlyCreatedDBObject(testLy, true);
                }

                //Change CurrentLayer, and thus altering the defaults in "txt.SetDatabaseDefaults()" below
                db.Clayer = testLy.ObjectId;

                DBText txt = new DBText();
                txt.SetDatabaseDefaults();
                ms.AppendEntity(txt);
                tr.AddNewlyCreatedDBObject(txt, true);

                txt.Position = new Point3d(100, 150, 0);
                txt.TextString = "Hello World!";

                txt.Layer = "Test"; 
                //or
                txt.LayerId = testLy.ObjectId;
                //or
                txt.LayerId = db.Clayer;

                tr.Commit();
            }

[Anonymous]

Thank you so much for the immediate reply. Layer is getting created and set as current layer in the drawing but i am not able to assign that created layer for the DBText object. In the drawing the DBText already exists and i need to change the existing text layer to Created layer.

[Anonymous]

Now i am able to assign the "Test" layer to the DBText objects but hoe to off that current layer so that the objects in layer "Test" are not visible.

[Anonymous]

Sorry , it is working now. I used the below code, Dim acLyrTbl As LayerTable acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForRead) Dim sLayerName As String = "Test" Dim acLyrTblRec As LayerTableRecord If acLyrTbl.Has(sLayerName) = False Then acLyrTblRec = New LayerTableRecord() '' Assign the layer a name acLyrTblRec.Name = sLayerName '' Upgrade the Layer table for write acLyrTbl.UpgradeOpen() '' Append the new layer to the Layer table and the transaction acLyrTbl.Add(acLyrTblRec) acTrans.AddNewlyCreatedDBObject(acLyrTblRec, True) Else acLyrTblRec = acTrans.GetObject(acLyrTbl(sLayerName), OpenMode.ForWrite) End If '' Turn the layer off acLyrTblRec.IsOff = True

[SENL1362]

Well done. Its fun learning to understand .NET.