zj-Exercise/C#/CSharpCAD/CadStudy/Cmd.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.Colors;
using DotNetARX2014;
using Autodesk.AutoCAD.Geometry;

namespace CadStudy
{
    public class Cmd
    {
        //Demo1：CmdLine直线
        [CommandMethod("CmdLine")]
        public void CmdLine()
        {
            Point3d startPoint = new Point3d(0, 0, 0); //声明起始点
            Point3d endPoint = new Point3d(100, 200, 0); //声明终止点
            Line line = new Line(startPoint, endPoint); //声明直线
            line.Color = Color.FromRgb(255, 0, 0); //设置颜色
            //line.Layer = "3";   //设置图层
            line.LineWeight = LineWeight.LineWeight050; //设置线宽
            //开启事务
            Database db = HostApplicationServices.WorkingDatabase;
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                //打开块表
                BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
                //打开块表记录
                BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                //向块表记录添加线条
                btr.AppendEntity(line);
                trans.AddNewlyCreatedDBObject(line, true);
                trans.Commit();
            }
        }

        //Demo2：CmdCir圆
        [CommandMethod("CmdCir")]
        public void CmdCir()
        {
            Circle circle = new Circle();//声明圆
            circle.Center = new Point3d(10, 20, 0); //声明圆心
            circle.Radius = 10; //声明半径
            //调用方法
            AddEntity(circle);
        }

        //Demo3：CmdArc圆弧
        [CommandMethod("CmdArc")]
        public void CmdArc()
        {
            //声明圆弧
            Arc arc = new Arc()
            {
                Center = new Point3d(50, 50, 0),    //设置圆弧的圆心
                Radius = 10,    //设置半径
                StartAngle = 0, //设置起始的弧度
                EndAngle = Math.PI / 2,  //设置终点的弧度
            };
            AddEntity(arc);
        }

        //Demo4：AddPolyline多段线
        [CommandMethod("AddPolyline")]
        public void AddPolyline()
        {
            Polyline polyline = new Polyline();//声明多段线
            //AddVertexAt：给多段线加拐点
            //第一个参数表示在第几个序列加点
            //第二个参数表示这个点的坐标
            //第三个参数表示这个点的凸起
            //第四个参数表示线的初始宽度
            //第五个参数表示线的终止宽度
            polyline.AddVertexAt(0, new Point2d(0, 0), 0, 0, 0);
            polyline.AddVertexAt(1, new Point2d(10, 10), 0, 0, 0);
            polyline.AddVertexAt(2, new Point2d(20, 0), 0, 0, 0);
            //重新设置拐点的坐标
            //polyline.SetPointAt(1, new Point2d(20, 30));
            //移除拐点
            //polyline.RemoveVertexAt(1);

            //NumberOfVertices：多段线所有的拐点数
            for (int i = 0; i < polyline.NumberOfVertices; i++)
            {
                Point2d point2D = polyline.GetPoint2dAt(i);//获取每一个点
            }

            polyline.Closed = false; //是否闭合

            AddEntity(polyline);
        }

        //Demo5：SelecetDemo选择集
        [CommandMethod("SelectDemo")]
        public void SelectDemo()
        {
            List<Entity> entities = SelectEntities();
        }

        //Demo6：单行文字
        [CommandMethod("AddText")]
        public void AddText()
        {
            DBText text = new DBText
            {
                TextString = "单行文字", //文字内容
                Position = new Point3d(10, 10, 0), //文字坐标
                Height = 3, //文字高度
                WidthFactor = 0.8,   //宽度因子
                //Rotation = Math.PI / 4, //旋转角度
                //IsMirroredInX = true,  //在X轴方向上镜像
                //IsMirroredInY = true,   //在Y轴方向上镜像
                //HorizontalMode = TextHorizontalMode.TextMid,
                //AlignmentPoint = new Point3d(20, 20, 0),
                //HorizontalMode = TextHorizontalMode.TextAlign,
                //AlignmentPoint = new Point3d(20, 20, 0),
            };
            List<TextStyleTableRecord> textStyleTableRecords = GetTextStyle();
            //判断是否有样式名为123
            //if表达式的意思是集合中有任意一个的样式等于123就返回true
            if (textStyleTableRecords.Any(x => x.Name == "123"))
            {
                //将第一个匹配的元素找出来
                text.TextStyleId = textStyleTableRecords.Find(x => x.Name == "123").ObjectId;
            }
            AddEntity(text);
        }




        //将公共方法提取出来
        private void AddEntity(Entity entity)
        {
            //开启事务
            Database db = HostApplicationServices.WorkingDatabase;
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                //打开块表
                BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
                //打开块表记录
                BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                //向块表记录添加对象
                btr.AppendEntity(entity);
                trans.AddNewlyCreatedDBObject(entity, true);
                trans.Commit();
            }
        }

        //获取文字样式的方法
        public List<TextStyleTableRecord> GetTextStyle()
        {
            List<TextStyleTableRecord> result = new List<TextStyleTableRecord>();  
            //获取数据库
            Database db = HostApplicationServices.WorkingDatabase;
            //打开事务
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                //获取字体样式的样式表
                TextStyleTable tt = (TextStyleTable)trans.GetObject(db.TextStyleTableId,OpenMode.ForRead);
                //遍历样式表
                foreach (var item in tt)
                {
                    //获取到每一个字体样式的记录
                    TextStyleTableRecord ttr = (TextStyleTableRecord)trans.GetObject(item, OpenMode.ForRead);
                    result.Add(ttr);
                }
            }
            return result;
        }


        //获取选择集的公共方法
        private List<Entity> SelectEntities()
        {
            Editor acDocEd = Application.DocumentManager.MdiActiveDocument.Editor;
            //获取PickFirst选择集
            PromptSelectionResult acSSPrompt;
            SelectionSet acSSet;
            //清空PickFirst选择集
            ObjectId[] idarrayEmpty = new ObjectId[0];
            acDocEd.SetImpliedSelection(idarrayEmpty);
            //请求从图形区域选择对象
            acSSPrompt = acDocEd.GetSelection();
            //如果提示状态O看，表示已选择对象
            if (acSSPrompt.Status == PromptStatus.OK)
            {
                acSSet = acSSPrompt.Value;
                List<ObjectId> objectIds = acSSet.GetObjectIds().ToList();
                Database database = HostApplicationServices.WorkingDatabase;
                List<Entity> entities = new List<Entity>();
                using (Transaction tran = database.TransactionManager.StartTransaction())
                {
                    foreach (var item in objectIds)
                    {
                        Entity entity = (Entity)item.GetObject(OpenMode.ForRead);
                        entities.Add(entity);
                    }
                }
                return entities;
            }
            else
            {
                Application.ShowAlertDialog("Number of objects selected:0");
                return null;
            }
        }
    }
}