ReadDwgFile doc.Database.Insert：eSelfReference

[wokeyiyognshenme]

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);

            }

[norman.yuan]

---

@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.

[_gile]

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);
                }
            }
        }

[wokeyiyognshenme]

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);

[wokeyiyognshenme]

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

[_gile]

Could you try it again, I corrected the code.

[wokeyiyognshenme]

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);
            }
        }

[_gile]

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

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

[wokeyiyognshenme]

there are many block in the xxx.dwg

1 import all of the block

2 import only one 

both are ok.