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锁定和解锁层（.NET）

2024-5-18 18:48| 发布者: admin| 查看: 322| 评论: 0|原作者: admin|来自: AutoCAD

锁定和解锁层（.NET）

您无法编辑锁定图层上的对象;但是，如果该层打开并解冻，它们仍然可见。您可以使锁定层成为当前图层，并且可以向其添加对象。您可以冻结和关闭锁定的图层，并更改其关联的颜色和线型。

使用该属性锁定或解锁图层。如果输入值，则图层将被锁定。如果输入值，则图层将解锁。IsLockedTRUEFALSE

锁定图层

本示例创建一个名为“ABC”的新图层，然后锁定该图层。

VB.NET

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
 
<CommandMethod("LockLayer")> _
Public Sub LockLayer()
    '' 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

                '' Lock the layer
                acLyrTblRec.IsLocked = True

                '' Upgrade the Layer table for write
                acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForWrite)

                '' Append the new layer to the Layer table and the transaction
                acLyrTbl.Add(acLyrTblRec)
                acTrans.AddNewlyCreatedDBObject(acLyrTblRec, True)
            End Using
        Else
            Dim acLyrTblRec As LayerTableRecord = acTrans.GetObject(acLyrTbl(sLayerName), _
                                                                    OpenMode.ForWrite)

            '' Lock the layer
            acLyrTblRec.IsLocked = True
        End If

        '' Save the changes and dispose of the transaction
        acTrans.Commit()
    End Using
End Sub

C#

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
 
[CommandMethod("LockLayer")]
public static void LockLayer()
{
    // 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;

                // Lock the layer
                acLyrTblRec.IsLocked = true;

                // Upgrade the Layer table for write
                acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForWrite);

                // Append the new layer to the Layer table and the transaction
                acLyrTbl.Add(acLyrTblRec);
                acTrans.AddNewlyCreatedDBObject(acLyrTblRec, true);
            }
        }
        else
        {
            LayerTableRecord acLyrTblRec = acTrans.GetObject(acLyrTbl[sLayerName],
                                            OpenMode.ForWrite) as LayerTableRecord;

            // Lock the layer
            acLyrTblRec.IsLocked = true;
        }

        // Save the changes and dispose of the transaction
        acTrans.Commit();
    }
}

VBA/ActiveX 代码参考

Sub LockLayer()
    ' Create a new layer called "ABC"
    Dim layerObj As AcadLayer
    Set layerObj = ThisDrawing.Layers.Add("ABC")
 
    ' Lock layer "ABC"
    layerObj.Lock = True
End Sub