画層をフリーズすると、表示の更新速度を速くしてオブジェクトの選択処理が向上し、複雑な図面の再描画時間を短縮できます。フリーズした画層上のオブジェクトは表示、印刷、または再作図されません。長期間使用しない画層をフリーズします。画層を「フリーズ解除」すると、AutoCAD はその画層上のオブジェクトを再描画して表示します。
画層をフリーズまたはフリーズ解除するには、IsFrozen プロパティを使用します。TRUE を入力すると、その画層はフリーズされます。FALSE を入力すると、その画層はフリーズ解除されます。
次の例は、"ABC" という新しい画層を作成し、次にその画層をフリーズします。
Imports Autodesk.AutoCAD.Runtime Imports Autodesk.AutoCAD.ApplicationServices Imports Autodesk.AutoCAD.DatabaseServices <CommandMethod("FreezeLayer")> _ Public Sub FreezeLayer() '' Get the current document and database Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument Dim acCurDb As Database = acDoc.Database '' Start a transaction Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction() '' Open the Layer table for read Dim acLyrTbl As LayerTable acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, _ OpenMode.ForRead) Dim sLayerName As String = "ABC" If acLyrTbl.Has(sLayerName) = False Then Using acLyrTblRec As LayerTableRecord = New LayerTableRecord() '' Assign the layer a name acLyrTblRec.Name = sLayerName '' Upgrade the Layer table for write acLyrTbl.UpgradeOpen() '' Append the new layer to the Layer table and the transaction acLyrTbl.Add(acLyrTblRec) acTrans.AddNewlyCreatedDBObject(acLyrTblRec, True) '' Freeze the layer acLyrTblRec.IsFrozen = True End Using Else Dim acLyrTblRec As LayerTableRecord = acTrans.GetObject(acLyrTbl(sLayerName), _ OpenMode.ForWrite) '' Freeze the layer acLyrTblRec.IsFrozen = True End If '' Save the changes and dispose of the transaction acTrans.Commit() End Using End Sub
using Autodesk.AutoCAD.Runtime; using Autodesk.AutoCAD.ApplicationServices; using Autodesk.AutoCAD.DatabaseServices; [CommandMethod("FreezeLayer")] public static void FreezeLayer() { // Get the current document and database Document acDoc = Application.DocumentManager.MdiActiveDocument; Database acCurDb = acDoc.Database; // Start a transaction using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) { // Open the Layer table for read LayerTable acLyrTbl; acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForRead) as LayerTable; string sLayerName = "ABC"; if (acLyrTbl.Has(sLayerName) == false) { using (LayerTableRecord acLyrTblRec = new LayerTableRecord()) { // Assign the layer a name acLyrTblRec.Name = sLayerName; // Upgrade the Layer table for write acLyrTbl.UpgradeOpen(); // Append the new layer to the Layer table and the transaction acLyrTbl.Add(acLyrTblRec); acTrans.AddNewlyCreatedDBObject(acLyrTblRec, true); // Freeze the layer acLyrTblRec.IsFrozen = true; } } else { LayerTableRecord acLyrTblRec = acTrans.GetObject(acLyrTbl[sLayerName], OpenMode.ForWrite) as LayerTableRecord; // Freeze the layer acLyrTblRec.IsFrozen = true; } // Save the changes and dispose of the transaction acTrans.Commit(); } }
Sub FreezeLayer() ' Create a new layer called "ABC" Dim layerObj As AcadLayer Set layerObj = ThisDrawing.Layers.Add("ABC") ' Freeze layer "ABC" layerObj.Freeze = True End Sub