• 【AutoCAD.NET】创建一个类库DLL文件(DotNetARX)写入一个工具类(Tools)以简化代码的编写


    01.创建一个类库(名为DotNetARX.dll)引用所需CAD开发的dll,设置赋值本地为false;创建静态类和静态方法(不用实例化,直接通过类名进行调用);函数说明用///

    (向当前模型空间中添加实体图元)代码如下:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using Autodesk.AutoCAD.DatabaseServices;
    using Autodesk.AutoCAD.Runtime;
    using Autodesk.AutoCAD.ApplicationServices;
    namespace DotNetARX
    {
        public static class Tools
        {
            /// <summary>
            /// 将实体图元添加到模型空间
            /// </summary>
            /// <param name="ent"></param>实体图元
            /// <returns>返回添加到模型空间中的实体ObjectId</returns>
            public static ObjectId AddToModelSpace(Entity ent)
            {
                ObjectId entId;//用于返回添加到模型空间中的实体ObjectId
                //定义一个指向当前数据库的事务处理,以添加实体
                Document acDoc = Application.DocumentManager.MdiActiveDocument;
                Database db = acDoc.Database;
                using (Transaction trans = db.TransactionManager.StartTransaction())
                {
                    BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);//以读的方式打开块表
                    //以写方式打开模型空间块表记录
                    BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                    entId = btr.AppendEntity(ent);//将图形对象的信息添加到块表记录中
                    trans.AddNewlyCreatedDBObject(ent, true);//把对象添加到事务处理中
                    trans.Commit();//提交事务处理
                }
                return entId;
            }
        }
    }

    02.使用静态类中的静态方法,下面是通过创建一条直线来示例:

    先引用开发所需的CAD的dll文件设置复制本地为false;添加引用自己所创建的静态类库DotNetARX.dll;添加命名空间,采用类名.方法名的方式引用

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using Autodesk.AutoCAD.DatabaseServices;
    using Autodesk.AutoCAD.Runtime;
    using Autodesk.AutoCAD.ApplicationServices;
    using Autodesk.AutoCAD.Geometry;
    using DotNetARX;//添加静态类的命名空间
    
    namespace Test
    {
        public static class class1
        {
            [CommandMethod("HLine")] //注册一个命令
            public static void HLine()
            {
                
                Line acline = new Line(new Point3d(0, 0, 0), new Point3d(10000, 1000, 0));
                Tools.AddToModelSpace(acline);//***引用静态类中的方法***
            }
        }
    }

    03.创建一个程序集,新建扩展方法,采用 [对象.方法]的模式调用

    namespace DotNetARX
    {
        public static class EntTools
        {
            /// <summary>
            /// 将实体图元添加到模型空间
            /// </summary>
            /// <param name="ent"></param>实体图元
            /// <returns>返回添加到模型空间中的实体ObjectId</returns>
            public static ObjectId AddToModelSpace(this Database db, Entity ent)
            {
                ObjectId entId;//用于返回添加到模型空间中的实体ObjectId
                //定义一个指向当前数据库的事务处理,以添加实体
                // Document acDoc = Application.DocumentManager.MdiActiveDocument;
                // Database db = acDoc.Database;
                using (Transaction trans = db.TransactionManager.StartTransaction())
                {
                    BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);//以读的方式打开块表
                    //以写方式打开模型空间块表记录
                    BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                    entId = btr.AppendEntity(ent);//将图形对象的信息添加到块表记录中
                    trans.AddNewlyCreatedDBObject(ent, true);//把对象添加到事务处理中
                    trans.Commit();//提交事务处理
                }
                return entId;
            }
        }
    }

    04.调用03中的程序集内的方法

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using Autodesk.AutoCAD.DatabaseServices;
    using Autodesk.AutoCAD.Geometry;
    using Autodesk.AutoCAD.Runtime;
    using DotNetARX;//添加对程序集空间的引用
    
    namespace testAddLine
    {
        public class Class1
        {
            [CommandMethod("TestAddLine")]
            public void TestAddLine()
            {
                Point3d startPoint = new Point3d(0,0,0);
                Point3d endPoint = new Point3d(1000,1000,0);
                Line newLine = new Line(startPoint,endPoint);
                Database db = HostApplicationServices.WorkingDatabase;
                
                //调用程序集函数
                db.AddToModelSpace(newLine);
            }
        }
    }

    <<the end>>

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  • 原文地址:https://www.cnblogs.com/Helchan/p/4463956.html
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