BRXNET: Clearing a layer

Arno Van Eeuwen

Hello all,

I'm trying to clear a layer in a specific layout (Model, Layout1), using code below. The behaviour is very unstable and unpredictable and I can't find what's going wrong. Is the nested Transaction a problem? 

Any comments would be greatly appreciated.

Arno van Eeuwen

[code]

public static bool ClearLayerInLayout(string layoutName, string layerName)    {      Document doc = Application.DocumentManager.MdiActiveDocument;          try      {        using (Transaction trans = doc.TransactionManager.StartTransaction())        {          DBDictionary layoutDictionary = (DBDictionary)trans.GetObject(doc.Database.LayoutDictionaryId, OpenMode.ForRead);           if (layoutDictionary.Contains(layoutName))          {            ObjectId layoutId = layoutDictionary.GetAt(layoutName);             Layout layout = (Layout)trans.GetObject(layoutId, OpenMode.ForRead);             BlockTableRecord layoutBlock = (BlockTableRecord)trans.GetObject(layout.BlockTableRecordId, OpenMode.ForWrite);             ClearLayerInBlock(layoutBlock, layerName);                        trans.Commit();          }        }        return true;      }      catch (System.Exception ex)      {        AcAp.Application.ShowAlertDialog(string.Format("\nError: {0}\nStackTrace: {1}", ex.Message, ex.StackTrace));        return false;      }    }

[/code]

[code]

public static void ClearLayerInBlock(BlockTableRecord block, string layerName)    {      Document doc = Application.DocumentManager.MdiActiveDocument;             try       {         ObjectIdCollection eraseIds = new ObjectIdCollection();          doc.Editor.WriteMessage(string.Format("Clearing layer : {0} in block : {1}\n", layerName, block.Name));          using (Transaction trans = doc.TransactionManager.StartTransaction())         {           foreach (Entity entity in block.Cast<<SPAN style="COLOR: #2b91af">ObjectId>().Select(id => (Entity)trans.GetObject(id, OpenMode.ForRead, true, true))                                                           .Where(entity => entity.Layer == layerName))           {             eraseIds.Add(entity.Id);           }            foreach (ObjectId id in eraseIds)           {             Entity ent = (Entity)trans.GetObject(id, OpenMode.ForWrite, true, true);             ent.Erase();           }            trans.Commit();         }       }       catch (System.Exception ex)       {         AcAp.Application.ShowAlertDialog(string.Format("\nError: {0}\nStackTrace: {1}", ex.Message, ex.StackTrace));       }    }

[/code]

Its_Alive

Hi Arno,

Try passing the transaction as a reference argrument I.e. ClearLayerInBlock(layoutBlock, layerName, ref Transaction trans);

if it turns out, you might file a support request.

Dan

Arno Van Eeuwen

Hi Daniel,

This one start giving me a headache.

I've tried your suggestion but with no success.

I guess it's upto Bricscad to see if there's an explanation.

Just curious: why do you suggest to pass the transaction byref?

I've tried without 'ref' as well but both cases failed.

Thanks for your ever swift reply.

Arno