topic Re: Dynamic Block Becomes Static After Insertion in .NET Forum

Dynamic Block Becomes Static After Insertion

ilovejingle — Thu, 19 Mar 2020 07:54:10 GMT

I am trying to write a program to replace the old block with the new block. both blocks are dynamic. It seems the new blockreference becomes static after insertion

Is there any simpler way to insert a dynamic block which already exists in the drawing?

Here is my code :

[CommandMethod("RP")] public void cmdRP() { Editor ed = Application.DocumentManager.MdiActiveDocument.Editor; var optEnt1 = new PromptEntityOptions("Please Select Entity to be replaced : "); var optEnt2 = new PromptEntityOptions("Please Select Enttity to Replace the orginal Entity : "); optEnt1.SetRejectMessage("Only Support Block Reference "); optEnt2.SetRejectMessage("Only Support Block Reference "); optEnt1.AddAllowedClass(typeof(BlockReference), true); optEnt2.AddAllowedClass(typeof(BlockReference), true); var blkOld = ed.GetEntity(optEnt1); if (blkOld.Status != PromptStatus.OK) return; var blkNew = ed.GetEntity(optEnt2); if (blkNew.Status != PromptStatus.OK) return; using (Transaction trans = HostApplicationServices.WorkingDatabase.TransactionManager.StartTransaction()) { try { var blkRefOld = trans.GetObject(blkOld.ObjectId, OpenMode.ForRead) as BlockReference; var blkRefNew = trans.GetObject(blkNew.ObjectId, OpenMode.ForRead) as BlockReference; var blkMat = blkRefOld.BlockTransform; var newBlkRef = new BlockReference(new Point3d(0, 0, 0), blkRefNew.BlockTableRecord); newBlkRef.SetDatabaseDefaults(); newBlkRef.TransformBy(blkMat); var bt = trans.GetObject(HostApplicationServices.WorkingDatabase.BlockTableId, OpenMode.ForRead) as BlockTable; var ms = trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; ms.AppendEntity(newBlkRef); trans.AddNewlyCreatedDBObject(newBlkRef, true); RXClass rxclass = RXObject.GetClass(typeof(AttributeDefinition)); var btr = trans.GetObject(blkRefOld.BlockTableRecord, OpenMode.ForRead) as BlockTableRecord; var collection = newBlkRef.AttributeCollection; if (btr.HasAttributeDefinitions) { foreach (ObjectId objId in btr) { if (objId.ObjectClass.IsDerivedFrom(rxclass)) { var attDef = trans.GetObject(objId, OpenMode.ForRead) as AttributeDefinition; if (!attDef.Constant) { var attRef = new AttributeReference(); attRef.SetAttributeFromBlock(attDef,blkMat); collection.AppendAttribute(attRef); trans.AddNewlyCreatedDBObject(attRef, true); } } } } bgFunction.SyncDynamicBlockProps(blkRefOld.ObjectId, newBlkRef.ObjectId, trans); blkRefOld.UpgradeOpen(); blkRefOld.Erase(); } catch (Autodesk.AutoCAD.Runtime.Exception ex) { ed.WriteMessage("Error : MAIN Method."); } finally { trans.Commit(); } } }

Re: Dynamic Block Becomes Static After Insertion

_gile — Thu, 19 Mar 2020 12:21:15 GMT

Hi,

What about this method?

bgFunction.SyncDynamicBlockProps

Re: Dynamic Block Becomes Static After Insertion

ilovejingle — Fri, 20 Mar 2020 01:08:21 GMT

This method has no relevance to this topic, it just try to copy all attributes value from the old block to the new block. I should remove it from my code before posting, sorry for that.

Re: Dynamic Block Becomes Static After Insertion

_gile — Fri, 20 Mar 2020 07:06:15 GMT

May be you can start from this (not deeply tested)

[CommandMethod("RP")] public static void CmdRp() { var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; var opts = new PromptEntityOptions("\nPlease Select Entity to be replaced : "); opts.SetRejectMessage("Only Support Block Reference "); opts.AddAllowedClass(typeof(BlockReference), true); var result = ed.GetEntity(opts); if (result.Status != PromptStatus.OK) return; var blkOldId = result.ObjectId; opts.Message = "\nPlease Select Entity to Replace the orginal Entity : "; result = ed.GetEntity(opts); if (result.Status != PromptStatus.OK) return; var blkNewId = result.ObjectId; using (var tr = db.TransactionManager.StartTransaction()) { var blkRefOld = (BlockReference)tr.GetObject(blkOldId, OpenMode.ForWrite); var blkRefNew = (BlockReference)tr.GetObject(blkNewId, OpenMode.ForRead); blkRefOld.BlockTableRecord = blkRefNew.DynamicBlockTableRecord; foreach (ObjectId id in blkRefOld.AttributeCollection) { var att = (AttributeReference)tr.GetObject(id, OpenMode.ForWrite); att.Erase(); } RXClass rxclass = RXObject.GetClass(typeof(AttributeDefinition)); var btr = tr.GetObject(blkRefNew.BlockTableRecord, OpenMode.ForRead) as BlockTableRecord; if (btr.HasAttributeDefinitions) { foreach (ObjectId objId in btr) { if (objId.ObjectClass.IsDerivedFrom(rxclass)) { var attDef = tr.GetObject(objId, OpenMode.ForRead) as AttributeDefinition; if (!attDef.Constant) { var attRef = new AttributeReference(); attRef.SetAttributeFromBlock(attDef, blkRefOld.BlockTransform); blkRefOld.AttributeCollection.AppendAttribute(attRef); tr.AddNewlyCreatedDBObject(attRef, true); } } } } tr.Commit(); } }

Re: Dynamic Block Becomes Static After Insertion

ilovejingle — Fri, 20 Mar 2020 07:34:38 GMT

It mazes me when it works.

What exactly happening in the code?

blkRefOld.BlockTableRecord = blkRefNew.DynamicBlockTableRecord;

Re: Dynamic Block Becomes Static After Insertion

_gile — Fri, 20 Mar 2020 08:49:48 GMT

A BlockReference is only an inserted reference to a BlockTableRecord.

You can simply change the BlockTableRecord the BlockReference references to.

For dynamic blocks, you have to reference to the DynamicBlockTableRecord (the original definition).