C# AutoCAD ActiveX 二次开发 CAD图层合并

因使用AutoCAD版本为2004,2006版本以后才有.net开发包，因此采用ActiveX方式进行开发。

功能为：将几个CAD图层合并到其中一个上，并设置坐标，线和标记的颜色和字体。

CAD对象的层级为

AcadApplication -

　　AcadDocument -

　　　　AcadModelSpace 

　　　　　　AcadEntity

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using AutoCAD;

namespace road
{
    public class CadMerge
    {
        #region members

        private AcadApplication app = null;
        private AcadDocument docLine = null;
        private AcadDocument docLineAnno = null;
        private AcadDocument docPoint = null;
        private AcadDocument docPointAnno = null;

        private AcadModelSpace msLineAnno = null;

        private string dirPath = "";
        private string tempPath = "";
        private string linePath = "";
        private string pointPath = "";
        private string pointAnnoPath = "";
        private string lineAnnoPath = "";

        private ProgressBar m_bar = null;

        #endregion

        public CadMerge(string path, ProgressBar bar)
        {
            this.dirPath = path;
            m_bar = bar;
            init();
        }

        //初始化参数
        private void init()
        {
            dirPath = dirPath+"\\";
            tempPath = dirPath + "temp\\";
            linePath = tempPath + "line.dwg";
            lineAnnoPath = dirPath + MainForm.m_resultDwgName;
            pointPath = tempPath + "point.dwg";
            pointAnnoPath = tempPath + "point_anno.dwg";

            app = new AcadApplication();
            m_bar.PerformStep();
            //app.Application.Visible = true;
            docLine = app.Documents.Open(linePath, null, null);
            docLineAnno = app.Documents.Open(lineAnnoPath, null, null);
            m_bar.PerformStep();
            docPoint = app.Documents.Open(pointPath, null, null);
            docPointAnno = app.Documents.Open(pointAnnoPath, null, null);
            m_bar.PerformStep();
        }

        //关闭cad文档
        private void CloseDocuments(AcadApplication app)
        {
            AcadDocuments docs = app.Documents;
            foreach (AcadDocument doc in docs)
            {
                if (doc.ReadOnly)
                {
                    doc.Close(false, null);
                }
                else
                {
                    doc.Close(true, null);
                }
            }
        }

        //合并cad文档
        public void MergeCADLayers()
        {
            msLineAnno = docLineAnno.ModelSpace;
            AcadModelSpace msLine = docLine.ModelSpace;
            AcadModelSpace msPoint = docPoint.ModelSpace;
            AcadModelSpace msPointAnno = docPointAnno.ModelSpace;
            updateLineAnno();
            AddLineToLineAnno(msLineAnno, msLine);
            m_bar.PerformStep();
            AddPointToLineAnno(msLineAnno, msPoint);
            m_bar.PerformStep();
            AddPointAnnoToLineAnno(msLineAnno, msPointAnno);
            updateColor();
            app.Update();
            docLineAnno.Save();
            CloseDocuments(app);
        }

        //更新线标记图层
        private void updateLineAnno()
        {
            foreach (AcadEntity entity in msLineAnno)
            {
                if (entity is AcadText)
                {
                    AcadText text = (AcadText)entity;
                    msLineAnno.AddText(text.TextString, getPoint(text.InsertionPoint), text.Height);
                    text.Delete();
                }
            }
        }

        //点的转换，新坐标要求
        private double[] getPoint(object from)
        {
            double[] point = new double[3];
            point[0] = ((double[])from)[0]-200000;
            point[1] = ((double[])from)[1]-200000;
            point[2] = 0;

            return point;
        }

        /// <summary>更新线和标记的颜色，标记的文字大小
/// </summary>
        private void updateColor()
        {
            foreach (AcadEntity entity in msLineAnno)
            {
                if (entity is AcadText)
                {
                    AcadText text = (AcadText)entity;
                    text.color = ACAD_COLOR.acRed;
                    text.Height = 3.5;
                }
                else if (entity is AcadLWPolyline)
                {
                    AcadLWPolyline line = (AcadLWPolyline)entity;
                    line.color = ACAD_COLOR.acBlue;
                }
                else if (entity is AcadLine)
                {
                    AcadLine line = (AcadLine)entity;
                    line.color = ACAD_COLOR.acBlue;
                }
                else if (entity is AcadPoint)
                {
                    AcadPoint point = (AcadPoint)entity;
                    point.color = ACAD_COLOR.acGreen;
                }
                else if (entity is AcadSpline)
                {
                    AcadSpline line = (AcadSpline)entity;
                    line.color = ACAD_COLOR.acBlue;
                }
                else if (entity is AcadPolyline)
                {
                    AcadPolyline line = (AcadPolyline)entity;
                    line.color = ACAD_COLOR.acBlue;
                }
                //MessageBox.Show(entity.ObjectName);
            }
        }

        /// <summary>将点标记添加到线标记图层
/// </summary>
        private void AddPointAnnoToLineAnno(AcadModelSpace msLineAnno, AcadModelSpace msPointAnno)
        {
            foreach (AcadEntity entity in msPointAnno)
            {
                if (entity is AcadText)
                {
                    AcadText text = (AcadText)entity;
                    msLineAnno.AddText(text.TextString,getPoint(text.InsertionPoint),text.Height);
                }
            }
        }

        /// <summary>将线添加到线标记图层
/// </summary>
        private void AddLineToLineAnno(AcadModelSpace msLineAnno,AcadModelSpace msLine)
        {
            foreach (AcadEntity entity in msLine)
            {
                if (entity is AcadLWPolyline)
                {
                    AcadLWPolyline line = (AcadLWPolyline)entity;
                    double[] fromPoints = (double[])line.Coordinates;
                    int count = fromPoints.Length;
                    double newCount = count * 1.5;
                    int newCounti = (int)newCount;
                    double[] points = new double[newCounti];

                    //原entity中double数组为x,y,x,y
//新Polyline要求点为x,y,z,x,y,z,此处z=0
                    for (int i = 0; i < count; i++)
                    {

                        int index = i / 2;
                        int j = index * 3;

                        if (i % 2 == 0)
                        {
                            points[j] = fromPoints[i]-200000;
                            points[j + 2] = 0;
                        }
                        else
                        {
                            points[j + 1] = fromPoints[i]-200000;
                        }
                    }
                    msLineAnno.AddPolyline(points);
                }
                else if (entity is AcadLine)
                {
                    AcadLine line = (AcadLine)entity;
                    double[] startPoint = new double[3];
                    double[] endPoint = new double[3];
                    startPoint[0] = ((double[])line.StartPoint)[0] - 200000;
                    startPoint[1] = ((double[])line.StartPoint)[1] - 200000;
                    startPoint[2] = 0;
                    endPoint[0] = ((double[])line.EndPoint)[0] - 200000;
                    endPoint[1] = ((double[])line.EndPoint)[1] - 200000;
                    endPoint[2] = 0;
                    msLineAnno.AddLine(startPoint, endPoint);
                }
            }
        }

        /// <summary>将点添加到线标记图层
/// </summary>
        private void AddPointToLineAnno(AcadModelSpace msLineAnno, AcadModelSpace msPoint)
        {
            foreach (AcadEntity entity in msPoint)
            {
                if (entity is AcadPoint)
                {
                    AcadPoint point = (AcadPoint)entity;
                    double[] fromPoint = (double[])point.Coordinates;
                    double[] topoint = new double[3];
                    topoint[0] = fromPoint[0]-200000;
                    topoint[1] = fromPoint[1] - 200000;
                    topoint[2] = 0;
                    msLineAnno.AddPoint(topoint); ;
                }
            }
        }
    }
}

3 修改字体

AcadTextStyle style=docLineAnno.TextStyles.Add("宋体");
//style.fontFile="C:/WINDOWS/Fonts/simsun.ttc"; // 程序在其他地方使用时，生成的cad文件打开时，可能会需要选择字体
style.SetFont("宋体",false,false,0,0); //cad文件打开时，不需要选择字体
//style.fontFile="C:/Programe Files/AutoCAD 2004/gbcbig.shx"; // 程序在其他地方使用时，生成的cad文件打开时，可能会需要选择字体
docLineAnno.ActiveTextStyle=style;

foreach(AcadEntity entity in msLineAnno)
{
    if(entity is AcadText)
    {
        AcadText text=(AcadText)entity;
        text.StyleName="宋体"；
        text.color=ACAD_COLOR.acByLayer;
        text.Height=3.5;
        text.ScaleFactor=0.75;        
    }
}

参考：

创建和编辑AutoCAD 图元