//https://www.modelical.com/en/explode-autocad-block-references-using-net/
public bool ExplodeBlockByNameCommand(string blockToExplode)
{
bool explodeResult = true;
Document bDwg = Application.DocumentManager.MdiActiveDocument;
Editor ed = bDwg.Editor;
Database db = bDwg.Database;
Autodesk.AutoCAD.DatabaseServices.TransactionManager bTransMan = bDwg.TransactionManager;
using (Transaction bTrans = bTransMan.StartTransaction())
{
try
{
BlockTable bt = (BlockTable)bTrans.GetObject(db.BlockTableId, OpenMode.ForRead);
ed.WriteMessage("\nProcessing {0}", blockToExplode);
if (bt.Has(blockToExplode))
{
ObjectId blkId = bt[blockToExplode];
BlockTableRecord btr = (BlockTableRecord)bTrans.GetObject(blkId, OpenMode.ForRead);
ObjectIdCollection blkRefs = btr.GetBlockReferenceIds(true, true);
foreach (ObjectId blkXId in blkRefs)
{
//create collection for exploded objects
DBObjectCollection objs = new DBObjectCollection();
//handle as entity and explode
Entity ent = (Entity)bTrans.GetObject(blkXId, OpenMode.ForRead);
ent.Explode(objs);
ed.WriteMessage("\nExploded an Instance of {0}", blockToExplode);
//erase Block
ent.UpgradeOpen();
ent.Erase();
BlockTableRecord btrCs = (BlockTableRecord)bTrans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
foreach (DBObject obj in objs)
{
Entity ent2 = (Entity)obj;
btrCs.AppendEntity(ent2);
bTrans.AddNewlyCreatedDBObject(ent2, true);
}
}
}
bTrans.Commit();
}
catch
{
ed.WriteMessage("\nSomething went wrong");
explodeResult = false;
}
finally
{
}
ed.WriteMessage("\n");
bTrans.Dispose();
bTransMan.Dispose();
}
return explodeResult; //return wheter the method was succesful or not
}
public void ExplodeBlockByNameCommand(Editor ed, Document doc, string blockToExplode)
{
Document bDwg = doc;
Database db = bDwg.Database;
Database olddb = HostApplicationServices.WorkingDatabase;
HostApplicationServices.WorkingDatabase = db;
Autodesk.AutoCAD.DatabaseServices.TransactionManager bTransMan = bDwg.TransactionManager;
using (Transaction bTrans = bTransMan.StartTransaction())
{
try
{
LayerTable lt = (LayerTable)bTrans.GetObject(db.LayerTableId, OpenMode.ForRead);
BlockTable bt = (BlockTable)bTrans.GetObject(db.BlockTableId, OpenMode.ForRead);
if (bt.Has(blockToExplode))
{
ObjectId blkId = bt[blockToExplode];
BlockTableRecord btr = (BlockTableRecord)bTrans.GetObject(blkId, OpenMode.ForRead);
ObjectIdCollection blkRefs = btr.GetBlockReferenceIds(true, true);
foreach (ObjectId blkXId in blkRefs)
{
//create collection for exploded objects
DBObjectCollection objs = new DBObjectCollection();
//handle as entity and explode
Entity ent = (Entity)bTrans.GetObject(blkXId, OpenMode.ForRead);
ent.Explode(objs);
//erase Block
ent.UpgradeOpen();
ent.Erase();
BlockTableRecord btrCs = (BlockTableRecord)bTrans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
foreach (DBObject obj in objs)
{
Entity ent2 = (Entity)obj;
if (!ent2.Linetype.Equals("ByLayer", StringComparison.CurrentCultureIgnoreCase) &&
!ent2.Linetype.Equals("Continuous", StringComparison.CurrentCultureIgnoreCase))
{
string layer = "EQUIPMENT-" + ent2.Linetype;
ObjectId oid;
if (!lt.Has(layer))
{
using (Transaction bTrans2 = bTransMan.StartTransaction())
{
ed.WriteMessage("\nCreating layer {0}", layer);
using (LayerTableRecord ltr = new LayerTableRecord())
{
LayerTable lt2 = (LayerTable)bTrans2.GetObject(db.LayerTableId, OpenMode.ForWrite);
ltr.Color = Color.FromColorIndex(ColorMethod.ByAci, 3);
ltr.Name = layer;
ltr.LinetypeObjectId = ent2.LinetypeId;
oid = lt2.Add(ltr);
bTrans2.AddNewlyCreatedDBObject(ltr, true);
bTrans2.Commit();
}
}
lt = (LayerTable)bTrans.GetObject(db.LayerTableId, OpenMode.ForRead);
}
else
{
oid = lt[layer];
}
ed.WriteMessage("\nSetting entity properties.");
ent2.LayerId = oid;
ent2.Linetype = "ByLayer";
}
btrCs.AppendEntity(ent2);
bTrans.AddNewlyCreatedDBObject(ent2, true);
}
}
//purge block
ObjectIdCollection blockIds = new ObjectIdCollection();
blockIds.Add(btr.ObjectId);
db.Purge(blockIds);
btr.UpgradeOpen();
btr.Erase();
}
else
{
ed.WriteMessage("\nCould not find block named {0}", blockToExplode);
}
bTrans.Commit();
}
catch (System.Exception err)
{
ed.WriteMessage("\nSomething went wrong: {0}", blockToExplode);
File.AppendAllText(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + "\\error.log", err.ToString());
}
finally
{
}
bTrans.Dispose();
bTransMan.Dispose();
HostApplicationServices.WorkingDatabase = olddb;
ed.WriteMessage("\n");
}
}
