Access a Collection

Most collection and container objects are accessed through the Document or Database objects. The Document and Database objects contain a property to access an object or object id for most of the available Collection objects. For example, the following code defines a variable and retrieves the LayersTable object which represents the collection of Layers in the current drawing:

VB.NET

'' Get the current document and start the Transaction Manager

Dim acCurDb As Database = Application.DocumentManager.MdiActiveDocument.Database

Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()

    '' This example returns the layer table for the current database

    Dim acLyrTbl As LayerTable

    acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, _

                                 OpenMode.ForRead)

    '' Dispose of the transaction

End Using

// Get the current document and start the Transaction Manager

Database acCurDb = Application.DocumentManager.MdiActiveDocument.Database;

using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())

    // This example returns the layer table for the current database

    LayerTable acLyrTbl;

    acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId,

                                 OpenMode.ForRead) as LayerTable;

     // Dispose of the transaction

VBA/ActiveX Code Reference