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ObjectARX 开发指南

创建线条对象（.NET）

2023-1-1 15:03| 发布者: admin| 查看: 469| 评论: 0|来自: AutoCAD

本示例在模型空间中添加一条从（5，5，0）开始，到（12，3，0）结束的线。

VB.NET

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
 
<CommandMethod("AddLine")> _
Public Sub AddLine()
    '' 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 Block table for read
        Dim acBlkTbl As BlockTable
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead)

        '' Open the Block table record Model space for write
        Dim acBlkTblRec As BlockTableRecord
        acBlkTblRec = acTrans.GetObject(acBlkTbl(BlockTableRecord.ModelSpace), _
                                        OpenMode.ForWrite)

        '' Create a line that starts at 5,5 and ends at 12,3
        Using acLine As Line = New Line(New Point3d(5, 5, 0), _
                                        New Point3d(12, 3, 0))

            '' Add the new object to the block table record and the transaction
            acBlkTblRec.AppendEntity(acLine)
            acTrans.AddNewlyCreatedDBObject(acLine, True)
        End Using

        '' Save the new object to the database
        acTrans.Commit()
    End Using
End Sub

C#

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
 
[CommandMethod("AddLine")]
public static void AddLine()
{
    // 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 Block table for read
        BlockTable acBlkTbl;
        acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
                                        OpenMode.ForRead) as BlockTable;

        // Open the Block table record Model space for write
        BlockTableRecord acBlkTblRec;
        acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
                                        OpenMode.ForWrite) as BlockTableRecord;

        // Create a line that starts at 5,5 and ends at 12,3
        using (Line acLine = new Line(new Point3d(5, 5, 0),
                                      new Point3d(12, 3, 0)))
        {

            // Add the new object to the block table record and the transaction
            acBlkTblRec.AppendEntity(acLine);
            acTrans.AddNewlyCreatedDBObject(acLine, true);
        }

        // Save the new object to the database
        acTrans.Commit();
    }
}

VBA/ActiveX 代码参考

Sub AddLine()
    ' Define the start point
    Dim ptStr(0 To 2) As Double
    ptStr(0) = 5: ptStr(1) = 5: ptStr(2) = 0#
 
    ' Define the end point
    Dim ptEnd(0 To 2) As Double
    ptEnd(0) = 12: ptEnd(1) = 3: ptEnd(2) = 0#
 
    ' Create a Line object in model space
    Dim lineObj As AcadLine
    Set lineObj = ThisDrawing.ModelSpace.AddLine(ptStr, ptEnd)
 
    ThisDrawing.Application.ZoomAll
End Sub