I want to Open Block Editor, Select all Lines ,and Join them to Create Polyline, and then save and Close Block Editor.

official.jaydeo — Sun, 18 Feb 2024 00:19:06 GMT

I want to join all the lines inside the blocks to Create Polyline, like we do manually by editing a block Definition , type JOIN command select all lines, and then save Block Definition

I am currently using following code but getting error at JoinEntities Line

i cannot use start and endpoints of Lines as Irregular Polyline may get Generated, as i have 100s of Lines to Join

@_gile @ActivistInvestor

[CommandMethod("cb")] public void JoinLinesInBlocks() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; using (Transaction tr = db.TransactionManager.StartTransaction()) { BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; foreach (ObjectId btrId in bt) { BlockTableRecord btr = tr.GetObject(btrId, OpenMode.ForRead) as BlockTableRecord; if (!btr.IsLayout) { BlockTableRecord blockDef = tr.GetObject(btrId, OpenMode.ForRead) as BlockTableRecord; Entity[] entityCollection; // Collect line entities in the block reference int i = 0; foreach (ObjectId entId in blockDef) { Entity entity = tr.GetObject(entId, OpenMode.ForRead) as Entity; if (entity is Line || entity is Arc || entity is Polyline) { entityCollection[i] = entity; i++; } } // Check if there are at least two entities to create a polyline if (entityCollection.Count() > 1) { // Create a new polyline Polyline polyline = new Polyline(); blockDef.UpgradeOpen(); // Join entities to create a polyline polyline.JoinEntities(entityCollection); // Save the modified block blockDef.AppendEntity(polyline); tr.AddNewlyCreatedDBObject(polyline, true); } } } // Commit the transaction tr.Commit(); } }

Re: I want to Open Block Editor, Select all Lines ,and Join them to Create Polyline, and then save and Close Block Editor.

_gile — Mon, 19 Feb 2024 15:58:56 GMT

Hi,

To join lines and arcs into a polyline, the entity on which the JoinEntities method is called must be a polyline.

You can try with something like this:

Edit: More robust version

public static void MJoinToPolylines(IEnumerable<Curve> source, Transaction tr) { if (source is null) throw new ArgumentNullException(nameof(source)); if (tr is null) throw new ArgumentNullException(nameof(tr)); var curves = source .Where (c => c is Arc || c is Line || c is Polyline) .ToList(); if (curves.Count == 0) return; var owner = (BlockTableRecord)tr.GetObject(curves[0].OwnerId, OpenMode.ForWrite); while (0 < curves.Count) { Polyline polyline = null; Curve curve = curves[0]; switch (curve) { case Polyline pline: polyline = (Polyline)pline.Clone(); break; case Line line: var plane = new Plane(Point3d.Origin, Vector3d.ZAxis); polyline = new Polyline(); polyline.AddVertexAt(0, line.StartPoint.Convert2d(plane), 0.0, 0.0, 0.0); polyline.AddVertexAt(1, line.EndPoint.Convert2d(plane), 0.0, 0.0, 0.0); break; case Arc arc: plane = new Plane(Point3d.Origin, Vector3d.ZAxis); polyline = new Polyline(); double angle = arc.EndAngle - arc.StartAngle; if (angle < 0) angle += Math.PI * 2; double bulge = Math.Tan(angle / 4); polyline.AddVertexAt(0, arc.StartPoint.Convert2d(plane), bulge, 0.0, 0.0); polyline.AddVertexAt(1, arc.EndPoint.Convert2d(plane), 0.0, 0.0, 0.0); break; } curves.Remove(curve); if (polyline != null) { owner.AppendEntity(polyline); tr.AddNewlyCreatedDBObject(polyline, true); try { var indices = polyline.JoinEntities(curves.ToArray()); if (!curve.IsWriteEnabled) tr.GetObject(curve.ObjectId, OpenMode.ForWrite); curve.Erase(); foreach (Curve c in indices.Cast<int>() .Select(i => curves[i]) .ToArray()) { curves.Remove(c); if (!c.IsWriteEnabled) tr.GetObject(c.ObjectId, OpenMode.ForWrite); c.Erase(); } } catch { polyline.Erase(); } } } }

Your command:

[CommandMethod("cb")] public void JoinLinesInBlocks() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; using (var tr = db.TransactionManager.StartTransaction()) { var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead); var validClassNames = new List<string> { "AcDbArc", "AcDbLine", "AcDbPolyline" }; foreach (ObjectId btrId in bt) { var btr = (BlockTableRecord)tr.GetObject(btrId, OpenMode.ForRead); if (!btr.IsLayout) { var curves = btr .Cast<ObjectId>() .Where(id => validClassNames.Contains(id.ObjectClass.Name)) .Select(id => (Curve)tr.GetObject(id, OpenMode.ForRead)); MJoinToPolylines(curves, tr); } } tr.Commit(); } }

topic I want to Open Block Editor, Select all Lines ,and Join them to Create Polyline, and then save and Close Block Editor. in .NET Forum

I want to Open Block Editor, Select all Lines ,and Join them to Create Polyline, and then save and Close Block Editor.

Re: I want to Open Block Editor, Select all Lines ,and Join them to Create Polyline, and then save and Close Block Editor.