Save json serialization in NOD (Named Object Dictionary)

Anonymous — Sat, 09 Mar 2019 11:07:40 GMT

I'm trying to save a large string in Xrecord date. In my case I want to save a json serialization. But from what I noticed Xrecord Data has a string size limitation. The string loses some of the content in XRecord.Data. My question is is there any way to save a large string in NOD? Or a way to save a file.json in NOD dictionary? Or save a json file in the dwg database? Or some better way to do this?

        public static void WriteNod(string content)//json serialization
        {
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                DBDictionary nod = (DBDictionary)tr.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForRead);
                DBDictionary dbDict;
                using (DocumentLock dl = doc.LockDocument())
                {
                    try
                    {
                        dbDict = tr.GetObject(nod.GetAt(dictName), OpenMode.ForWrite) as DBDictionary;
                        foreach (DBDictionaryEntry entry in dbDict)
                            dbDict.Remove(entry.Key);
                    }
                    catch
                    {
                        nod.UpgradeOpen();
                        dbDict = new DBDictionary();
                        nod.SetAt(dictName, dbDict);
                        tr.AddNewlyCreatedDBObject(dbDict, true);
                    }
                    Xrecord xrec = new Xrecord();
                    ResultBuffer datas = new ResultBuffer();
                    datas.Add(new TypedValue((int)DxfCode.Text, content));
                    xrec.Data = datas;//here is the problem
                    dbDict.SetAt("Library", xrec);
                    tr.AddNewlyCreatedDBObject(xrec, true);
                }
                tr.Commit();
            }
        }

Re: Save json serialization in NOD (Named Object Dictionary)

ActivistInvestor — Sun, 10 Mar 2019 12:11:12 GMT

You would need to break the string up into multiple elements and store each in the Xrecord. And then concatenate them when reading the data back.

@Anonymous wrote:

        public static void WriteNod(string content)//json serialization
        {
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                DBDictionary nod = (DBDictionary)tr.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForRead);
                DBDictionary dbDict;
                using (DocumentLock dl = doc.LockDocument())
                {
                    try
                    {
                        dbDict = tr.GetObject(nod.GetAt(dictName), OpenMode.ForWrite) as DBDictionary;
                        foreach (DBDictionaryEntry entry in dbDict)
                            dbDict.Remove(entry.Key);
                    }
                    catch
                    {
                        nod.UpgradeOpen();
                        dbDict = new DBDictionary();
                        nod.SetAt(dictName, dbDict);
                        tr.AddNewlyCreatedDBObject(dbDict, true);
                    }
                    Xrecord xrec = new Xrecord();
                    ResultBuffer datas = new ResultBuffer();
                    datas.Add(new TypedValue((int)DxfCode.Text, content));
                    xrec.Data = datas;//here is the problem
                    dbDict.SetAt("Library", xrec);
                    tr.AddNewlyCreatedDBObject(xrec, true);
                }
                tr.Commit();
            }
        }

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Save json serialization in NOD (Named Object Dictionary)

Re: Save json serialization in NOD (Named Object Dictionary)