topic Re: ReadDwgFile doc.Database.Insert：eSelfReference in .NET Forum

ReadDwgFile doc.Database.Insert：eSelfReference

wokeyiyognshenme — Fri, 13 Jan 2023 20:35:07 GMT

I have a bloks.dwg, there are many block definition in the blocks.dwg. one of them called "ABC"。

I want import "ABC" in my current dwg.

The following code doesn't work: eSelfReference ！！！why ???

Document doc = CADAPP.DocumentManager.MdiActiveDocument;

Database db = doc.Database;

try

{

using (Database dbSource = new Database(false, true))

{

dbdbSource .ReadDwgFile(@"d:\blocks.dwg", System.IO.FileShare.Read, true, null);

dbdbSource .CloseInput(true);

using (DocumentLock docLock = doc.LockDocument())

{

using (Transaction trans = doc.TransactionManager.StartTransaction())

{

//insert it as a new block

ObjectId id = doc.Database.Insert("ABC", dbdbSource , false);

trans.Commit();

}

catch (Exception eee)

{

MessageBox.Show(eee.Message);

}

Re: ReadDwgFile doc.Database.Insert：eSelfReference

norman.yuan — Fri, 13 Jan 2023 20:47:48 GMT

@wokeyiyognshenme wrote:

... there are many block definition in the blocks.dwg. one of them called "ABC"。

So, the DWG file you are to insert into current drawing database IS NOT A BLOCK drawing, rather, it is a drawing containing many block definitions. If you insert a drawing into the current database, the inserted drawing would becomes a BLOCK DEFINITION in the current drawing with the name supplied in the Database.Insert() method. So, you want the entire "blocks.dwg" inserted into current database as a block definition with name "ABC", but the intended block definition has already contained a block definition inside with the name "ABC", hence the error.

If you want to import a block definition from external drawing, which is not a block drawing and may contains multiple block definitions, you DO NOT INSERT the entire drawing; instead, you use WBlockCloneObjects() to bring in one or more block definitions in interest.

Re: ReadDwgFile doc.Database.Insert：eSelfReference

_gile — Sat, 14 Jan 2023 09:32:10 GMT

Hi,

To import a BlockTableRecord from an external Database, you should use WBlockCloneObjects.

EDIT, @norman.yuan replied faster.

public static void ImportABC() { var targetDb = HostApplicationServices.WorkingDatabase; var ids = new ObjectIdCollection(); using (var sourceDb = new Database(false, true)) { sourceDb.ReadDwgFile(@"D:\blocks.dwg", FileOpenMode.OpenForReadAndReadShare, false, null); using (var tr = sourceDb.TransactionManager.StartTransaction()) { var bt = (BlockTable)tr.GetObject(sourceDb.BlockTableId, OpenMode.ForRead); if (bt.Has("ABC")) { ids.Add(bt["ABC"]); } tr.Commit(); } if (ids.Count == 1) { var mapping = new IdMapping(); targetDb.WblockCloneObjects(ids, targetDb.BlockTableId, mapping, DuplicateRecordCloning.Replace, false); } } }

Re: ReadDwgFile doc.Database.Insert：eSelfReference

wokeyiyognshenme — Sat, 14 Jan 2023 08:48:23 GMT

your code doesn't work。

private void button8_Click(object sender, EventArgs e)
{
Document doc = CADAPP.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;

using (doc.LockDocument())
{
ImportABC();
}
}

// Error: ePermanentlyErased。

targetDb.WblockCloneObjects(ids, targetDb.BlockTableId, mapping, DuplicateRecordCloning.Replace, false);

Re: ReadDwgFile doc.Database.Insert：eSelfReference

wokeyiyognshenme — Sat, 14 Jan 2023 09:00:11 GMT

how to use WBlockCloneObjects() could you please give an example

Re: ReadDwgFile doc.Database.Insert：eSelfReference

_gile — Sat, 14 Jan 2023 09:41:53 GMT

Re: ReadDwgFile doc.Database.Insert：eSelfReference

wokeyiyognshenme — Sat, 14 Jan 2023 10:30:17 GMT

your code doesn't work.

I try it twice .

first time :
Unhandled Access Violation Reading 0x0170 Exception at CC3F58BFh

second time:
Unhandled Access Violation Reading 0x0128 Exception at CC3F58BFh

private void button10_Click(object sender, EventArgs e) { Document doc = CADAPP.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; using (doc.LockDocument()) { ImportBlocks_gile(db, @"d:\abclqh.dwg"); } } public void ImportBlocks_gile (Database destDb, string filename) { var ids = new ObjectIdCollection(); using (var sourceDb = new Database(false, true)) { sourceDb.ReadDwgFile(filename, FileOpenMode.OpenForReadAndReadShare, false, null); using (var tr = sourceDb.TransactionManager.StartTransaction()) { var bt = (BlockTable)tr.GetObject(sourceDb.BlockTableId, OpenMode.ForRead); foreach (ObjectId id in bt) { var btr = (BlockTableRecord)tr.GetObject(id, OpenMode.ForRead); if (!btr.IsAnonymous && !btr.IsLayout) ids.Add(id); } tr.Commit(); } var mapping = new IdMapping(); destDb.WblockCloneObjects(ids, destDb.BlockTableId, mapping, DuplicateRecordCloning.Replace, false); } }

Re: ReadDwgFile doc.Database.Insert：eSelfReference

_gile — Sat, 14 Jan 2023 10:36:26 GMT

It seems there's some confusion between you two topics.

This one was to import a single block named "ABC".

Re: ReadDwgFile doc.Database.Insert：eSelfReference

wokeyiyognshenme — Sat, 14 Jan 2023 11:07:23 GMT

there are many block in the xxx.dwg

1 import all of the block

2 import only one

both are ok.