访问集合 （.NET）
大多数集合和容器对象都是通过 or 对象访问的。和 对象包含一个属性，用于访问大多数可用 Collection 对象的对象或对象 ID。例如，下面的代码定义一个变量并检索表示当前图形中集合的对象：DocumentDatabaseDocumentDatabaseLayersTableLayers 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
C#// 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 代码参考Dim layerCollection as AcadLayers Set layerCollection = ThisDrawing.Layers 相关概念父主题： |
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