6基于C#的CAD二次开发-对象选择（通过范围选择对象）_c# autocad 选择集

1 程序界面

2 主要程序段

所有程序段都经过调试，能正常使用。如有疑问，请自行调试后再使用。

2.1 选择所有实体

        /// <summary>
        /// 选择所有实体
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            PromptSelectionResult psr = ed.SelectAll();
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                    ObjectId a11 = tr.GetObject(objectId1, OpenMode.ForRead).OwnerId;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = tr.GetObject(a11, OpenMode.ForRead).GetType().Name;
                }
               ObjectId objectId6=  ed.CurrentViewportObjectId;
                Viewport entity6 = tr.GetObject(objectId6, OpenMode.ForRead) as Viewport;
                MessageBox.Show(entity6.Width.ToString());
            }
        }
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2.2 在图形中选择实体

        /// <summary>
        /// 在图形中选择实体
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            ed.WriteMessage("\n请框选对象\n");
            PromptSelectionResult psr = ed.GetSelection();
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.3 由选择多点组成一个多边形区域，选择多边形区域中及和多边形相交的实体

        /// <summary>
        /// 由选择多点组成一个多边形区域，选择多边形区域中及和多边形相交的实体
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;

            //通过选择点创建多边形，选择的点不能封闭，连成的线不能自相交
            Point3dCollection pt3dCol = new Point3dCollection();
            for (int i = 0; i < 5; i++)
            {
                PromptPointOptions pPtOpts = new PromptPointOptions("");
                // 提示起点
                pPtOpts.Message = "\n选择多边形第"+(i+1).ToString()+"点\n";
                PromptPointResult psrP = ed.GetPoint(pPtOpts);
                pt3dCol.Add(psrP.Value);
            }

            //通过多边形选择，选择范围为和该多边形相交以及该多边形内部的对象
            PromptSelectionResult psr = ed.SelectCrossingPolygon(pt3dCol);
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.4 通过两点连线为对角线构建一个四边形，选择该四边形的边界和四边形内的对象

        /// <summary>
        /// 通过两点连线为对角线构建一个四边形，选择该四边形的边界和四边形内的对象
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
      

            PromptPointOptions pPtOpts = new PromptPointOptions("");
            // 提示起点
            pPtOpts.Message = "\n选择第1点";
            PromptPointResult psrP = ed.GetPoint(pPtOpts);
            Point3d point3D1 = psrP.Value;
            pPtOpts.Message = "\n选择第2点";
            psrP = ed.GetPoint(pPtOpts);
            Point3d point3D2 = psrP.Value;


            PromptSelectionResult psr = ed.SelectCrossingWindow(point3D1, point3D2);
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.5 栏选

        /// <summary>
        /// 栏选。和SelectCrossingPolygon不同。该方法由多点组成一条曲线，只选择和该曲线相交的对象。
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;

            //通过选择点创建多边形，选择的点不能封闭，连成的线不能自相交
            Point3dCollection pt3dCol = new Point3dCollection();
            for (int i = 0; i < 5; i++)
            {
                PromptPointOptions pPtOpts = new PromptPointOptions("");
                // 提示起点
                pPtOpts.Message = "\n选择多边形第" + (i + 1).ToString() + "点\n";
                PromptPointResult psrP = ed.GetPoint(pPtOpts);
                pt3dCol.Add(psrP.Value);
            }

            //通过多边形选择，选择范围为和该多边形相交以及该多边形内部的对象
            PromptSelectionResult psr = ed.SelectFence(pt3dCol);
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.6 选择当前图形中已经选择的实体

        /// <summary>
        /// 选择当前图形中已经选择的实体。意思是指手动在CAD界面中选择实体后，
        /// 用该命令可以将手动选择的实体添加到程序的ObjectId数组中，以便程序对手动选择的实体进行后续操作。
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            PromptSelectionResult psr = ed.SelectImplied();
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.7 选择图形中最后绘制的实体

       /// <summary>
        /// 选择图形中最后绘制的实体
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button7_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            PromptSelectionResult psr = ed.SelectLast();
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }

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2.8 选择上一个选择集

        /// <summary>
        /// 选择上一个选择集
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button8_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            PromptSelectionResult psr = ed.SelectPrevious();
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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2.9 在图形中选择实体

       private void button9_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;


            PromptPointOptions pPtOpts = new PromptPointOptions("");
            // 提示起点
            pPtOpts.Message = "\n选择第1点";
            PromptPointResult psrP = ed.GetPoint(pPtOpts);
            Point3d point3D1 = psrP.Value;
            pPtOpts.Message = "\n选择第2点";
            psrP = ed.GetPoint(pPtOpts);
            Point3d point3D2 = psrP.Value;


            PromptSelectionResult psr = ed.SelectWindow(point3D1, point3D2);
            if (psr.Status != PromptStatus.OK)
            {
                ed.WriteMessage("\n未选择任何对象。\n");
                return;
            }
            SelectionSet sSet = psr.Value;
            ObjectId[] selectedIds = sSet.GetObjectIds();  // 获取选择对象的ObjectiID数组.
            using (Transaction tr = doc.Database.TransactionManager.StartTransaction())
            {
                foreach (ObjectId objectId1 in selectedIds)
                {
                    //将获取的ObjectId转换为具体的实体Entity
                    Entity entity1 = tr.GetObject(objectId1, OpenMode.ForRead) as Entity;
                    //将实体Entity的有关信息显示在交互界面的表格
                    int index = dataGridView1.Rows.Add();
                    dataGridView1.Rows[index].Cells["对象类型"].Value = entity1.GetType().Name;
                    dataGridView1.Rows[index].Cells["ObjectId"].Value = entity1.ObjectId.ToString();
                }
            }
        }
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3 编辑器类Editor

实体的选择主要在编辑器类Editor中进行。该类和文档相关，如用在内存中打开文件，且文件不显示的方式打开文档（即后台打开CAD文件），则该类不能在，须通过其他的方式进行对象的选择。

3.1 Editor类库基本信息

3.2 Editor类库方法

3.3 Editor类库属性