Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'

agomezfe — Tue, 08 Nov 2022 15:57:42 GMT

I am writing a C#.NET program that interacts with AutoCAD through the AutoCAD .NET API.

The program changes the objects from one layer to another, if the layer does not exist it creates a new one with some parameters that are passed through a document. To open the document we use the ReadDwgFile method. We open the document in a hidden way, so that it does not run. I have tried to change the transparency of the document that I have active, and it does it without problems, it gives me an error when I do it in a file that I do not have active. So I think the error is there. Is there a way to change the transparency of a layer whose file I have opened with the ReadDwgFile method?

The program gives an error when I want to change the transparency of the layer of a document that I do not have open.

using (Database destinationDatabase = new Database(false, true)) { destinationDatabase.ReadDwgFile(file.FullName, FileShare.ReadWrite, true, ""); using (Transaction destinationTransaction = destinationDatabase.TransactionManager.StartTransaction()) { BlockTable bt = (BlockTable)destinationTransaction.GetObject(destinationDatabase.BlockTableId, OpenMode.ForWrite); BlockTableRecord record = destinationTransaction.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; LayerTable layertable; layertable = destinationTransaction.GetObject(destinationDatabase.LayerTableId,OpenMode.ForWrite) as LayerTable; foreach (ObjectId ob in record) { Entity eo = (Entity)ob.GetObject(OpenMode.ForWrite); if (DicLayer.Keys.Contains(eo.Layer)) { ClassLayer layer = DicLayer[eo.Layer]; if (!layertable.Has(layer.LayerNewName)) { using (LayerTableRecord layertablerecord = new LayerTableRecord()) { Type enumType = typeof(LineWeight); System.Reflection.FieldInfo[] fieldInfos = enumType.GetFields(); Dictionary<string, FieldInfo> lineWeigthDict = new Dictionary<string, FieldInfo>(); foreach (System.Reflection.FieldInfo fieldInfo in fieldInfos) { lineWeigthDict.Add(fieldInfo.Name, fieldInfo); } LinetypeTable acLinTbl; acLinTbl = destinationTransaction.GetObject(destinationDatabase.LinetypeTableId, OpenMode.ForWrite) as LinetypeTable; // Line Weight string lineWeigtName = ""; String lwn = layer.LineWeight; switch (lwn) { case "Default": lineWeigtName = "ByLineWeightDefault"; break; default: lineWeigtName = "LineWeight" + layer.LineWeight; break; } LineWeight lineWeight = (LineWeight)lineWeigthDict[lineWeigtName].GetValue(null); layertablerecord.Color = Color.FromColorIndex(ColorMethod.ByAci, short.Parse(layer.Color.ToString())); layertablerecord.Name = layer.LayerNewName; layertablerecord.LineWeight = lineWeight; layertablerecord.LinetypeObjectId = acLinTbl[layer.LineType]; Byte alpha = (Byte)(255 * (100 - Int32.Parse(layer.Transpaerncy)) / 100); Transparency transparency = new Transparency(alpha); layertablerecord.Transparency = transparency; // Upgrade the Layer table for write destinationTransaction.GetObject(destinationDatabase.LayerTableId, OpenMode.ForWrite); // Append the new layer to the Layer table and the transaction layertable.Add(layertablerecord); destinationTransaction.AddNewlyCreatedDBObject(layertablerecord, true); } eo.Layer = layer.LayerNewName; } else { eo.Layer = layer.LayerNewName; } } } destinationTransaction.Commit(); } destinationDatabase.RetainOriginalThumbnailBitmap = true; destinationDatabase.SaveAs(file.FullName, true, DwgVersion.Current, null); }

Re: Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'

WonkaPet — Thu, 10 Nov 2022 17:02:02 GMT

Can you try changing the transparency after you add the layertablerecord to the database?
Try changing the transparency on line 76.

Re: Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'

agomezfe — Mon, 14 Nov 2022 08:00:17 GMT

Thanks, the change has worked correctly for me.

topic Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase' in .NET Forum

Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'

Re: Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'

Re: Autodesk.AutoCAD.Runtime.Exception: 'eNoDatabase'