cad.net 生成二维码

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QRCoder

using System.Drawing;
using System.Collections.Generic;
using System.Collections;
using System;
using System.IO;
using System.Drawing.Imaging;

using QRCoder;//引入nuget包:QRCoder

namespace JoinBox
{
    public class QRCodeEncoder
    {
        public QRCode QRCode { get; set; }
        public List<BitArray> ModuleMatrix { get; set; }
        string _Content;
        int _Version;

        /// <summary>
        /// 创建二维码
        /// </summary>
        /// <param name="codeContent">信息</param>
        /// <param name="version">版本1~40,如果是0会依照内容缩放图片</param>
        /// <returns></returns>
        public QRCodeEncoder(string codeContent, int version = 10)
        {
            _Content      = codeContent;

            //当参数一是:  https://www.cnblogs.com/JJBox/p/14485956.html
            //测试手机QQ,参数2为5以下不能识别.
            //如果参数1内容多的话,参数2偏大则更容易识别.
            //(是否设置为一个比例而不是一个固定版本?)
            _Version      = version;
        }

        /// <summary>
        /// 构建
        /// </summary>
        public void Build()
        {
            var generator = new QRCodeGenerator();
            var data = generator.CreateQrCode(
                _Content,
                QRCodeGenerator.ECCLevel.H,//这里设置容错率的一个级别
                false,                     //手机QQ能不能扫描就看这里了
                false,                     //手机QQ能不能扫描就看这里了
                QRCodeGenerator.EciMode.Utf8,
                _Version);
            QRCode = new QRCode(data);
            ModuleMatrix = data.ModuleMatrix;
        }

        public Color QRBitmapColor1 { get; set; } = Color.Black;
        public Color QRBitmapColor2 { get; set; } = Color.White;
        public Image QRBitmap { get; set; }

        /// <summary>
        /// 构建位图
        /// </summary>
        /// <param name="pixel">像素点大小</param>
        /// <param name="size">图标尺寸</param>
        /// <param name="border">图标边框厚度</param>
        /// <param name="whiteEdge">二维码白边</param>
        /// <returns></returns>
        public void BuildBitmap(int pixel = 5, int size = 5, int border = 0, bool whiteEdge = false)
        {
            if (QRCode == null)
                throw new ArgumentNullException(nameof(QRCode));

            QRBitmap = QRCode.GetGraphic(pixel,
                QRBitmapColor1,
                QRBitmapColor2,
                null,
                size,
                border,
                whiteEdge);
        }

        static Dictionary<string, ImageFormat> ExtDict;

        /// <summary>
        /// 保存位图
        /// </summary>
        /// <param name="imgPath">带文件名后缀的完整路径</param>
        /// <returns></returns>
        public void SaveBitmap(string imgPath)
        {
            if (QRBitmap == null)
                throw new ArgumentNullException(nameof(QRBitmap));

            //反射ImageFormat获取匹配后缀类型
            if (!Path.HasExtension(imgPath))
                throw new ArgumentNullException("路径没有后缀");
            var ext = Path.GetExtension(imgPath).ToLower();
            ext = ext.Replace(".", string.Empty).Replace("jpg", "jpeg");

            if (ExtDict == null)//仅运行程序的第一次执行
            {
                ExtDict = new();
                var imgf = typeof(ImageFormat);
                var properties = imgf.GetProperties();
                foreach (var item in properties)
                {
                    var name = item.Name.ToLower();
                    if (!ExtDict.ContainsKey(name))
                    {
                        try
                        {
                            //类型强转可能报错
                            var a = (ImageFormat)item.GetValue(imgf, null);//获取属性的值
                            ExtDict.Add(name, a);
                        }
                        catch
                        { }
                    }
                }
            }

            if (ExtDict.ContainsKey(ext))
                QRBitmap.Save(imgPath, ExtDict[ext]);
        }
    }
}

命令

using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using DoubleCollection = Autodesk.AutoCAD.Geometry.DoubleCollection;
using Acap = Autodesk.AutoCAD.ApplicationServices.Application;
using Color = Autodesk.AutoCAD.Colors.Color;
using System.Collections.Generic;
using System.Collections;

namespace JoinBox
{
    public class CmdTest_QRCodeGeneratorClass
    {
        [CommandMethod("CmdTest_QRCodeGenerator")]
        public void CmdTest_QRCodeGenerator()
        {
            var msg = "二维码测试";
            msg = "https://www.cnblogs.com/JJBox";
            // msg = "https://www.cnblogs.com/JJBox/p/14485956.html";
            var qr = new QRCodeEncoder(msg);
            qr.Build();
            var bits = qr.ModuleMatrix;

            //这里是新建图片到桌面上
            qr.BuildBitmap();
            var desktop = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
            qr.SaveBitmap(desktop + @"\QRCode.jpg");

            //这里新建图元到cad数据库
            var dm = Acap.DocumentManager;
            var doc = dm.MdiActiveDocument;
            var db = doc.Database;

            db.Action(tr => {
                var btr = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
                CreateQRCodeHatch(tr, btr, bits, false);//不需要背景
                btr.Dispose();
            });
        }

        /// <summary>
        /// 创建二维码填充
        /// </summary>
        /// <param name="tr"></param>
        /// <param name="btr"></param>
        /// <param name="bits">二维码矩阵</param>
        /// <param name="needBackground">是否需要背景</param>
        void CreateQRCodeHatch(Transaction tr, BlockTableRecord btr, IEnumerable<BitArray> bits, bool needBackground = true)
        {
            Hatch hatchBackground = null;
            if (needBackground)
            {
                //填充背景_白色
                hatchBackground = CreateHatch("Solid", Color.FromRgb(255, 255, 255));
                btr.AppendEntity(hatchBackground);
                tr.AddNewlyCreatedDBObject(hatchBackground, true);
            }

            //填充前景_其他颜色
            var hatch2Color = Color.FromRgb(160, 200, 58);//绿色
            hatch2Color = Color.FromRgb(1, 1, 1);         //黑色
            var hatch = CreateHatch("Solid", hatch2Color);
            hatch.ColorIndex = 2; //黄色
            btr.AppendEntity(hatch);
            tr.AddNewlyCreatedDBObject(hatch, true);

            ChangeHatch(tr, bits, hatch, hatchBackground);

            //重新计算填充
            if (hatchBackground == null)
                hatchBackground.EvaluateHatch(true);
            hatch.EvaluateHatch(true);
        }

        /// <summary>
        /// 创建填充
        /// </summary>
        Hatch CreateHatch(string hatchName, Color hatchColor)
        {
            var hat = new Hatch();
            hat.SetDatabaseDefaults();
            hat.SetHatchPattern(HatchPatternType.PreDefined, hatchName);
            hat.Color = hatchColor;
            return hat;
        }

        /// <summary>
        /// 修改填充
        /// </summary>
        void ChangeHatch(Transaction tr, IEnumerable<BitArray> bits, Hatch hatch, Hatch hatchBackground = null, int size = 100)
        {
            //设置多段线的凸度,数量和点集一样,而且自动赋值0
            var bluges = new DoubleCollection(new double[5]);
            int i = 0;
            foreach (var bitArray in bits)
            {
                for (int j = 0; j < bitArray.Length; j++)
                {
                    //创建矩形框5个点,否则填充是不闭合的
                    var p1 = new Point2d(j * size, i * size);
                    var p2 = new Point2d(p1.X + size, p1.Y);
                    var p3 = new Point2d(p2.X, p1.Y + size);
                    var p4 = new Point2d(p1.X, p3.Y);
                    var pts = new Point2dCollection { p1, p2, p3, p4, p1 };
                    if (bitArray.Get(j))
                        hatch.AppendLoop(HatchLoopTypes.Default, pts, bluges, tr);//填充黑块
                    else
                        if (hatchBackground != null)
                        hatchBackground.AppendLoop(HatchLoopTypes.Default, pts, bluges, tr);//填充白色背景
                }
                i--; //换行
            }
        }
    }
}

仿高版本的填充函数

public static partial class EntityAdd
{ 
    /// <summary>
    /// 仿高版本的填充函数
    /// </summary>
    /// <param name="hatch"></param>
    /// <param name="hatchLoopTypes"></param>
    /// <param name="pts"></param>
    /// <param name="bluges"></param>
    public static void AppendLoop(this Hatch hatch,
        HatchLoopTypes hatchLoopTypes, Point2dCollection pts, DoubleCollection bluges,
        Transaction tr, bool removePline = true)
    {
#if NET35   //留个作业🤣
        var bvws = new List<BulgeVertexWidth>();

        var itor1 = pts.GetEnumerator();
        var itor2 = bluges.GetEnumerator();
        while (itor1.MoveNext() && itor2.MoveNext())
            bvws.Add(new BulgeVertexWidth(itor1.Current, itor2.Current));

        var pl = EntityAdd.AddPolyLineToEntity(bvws);
        var id = EntityAdd.AddEntityToMsPs(tr, hatch.Database, pl);//因为这里没有事务
        hatch.AppendLoop(hatchLoopTypes, new ObjectIdCollection() { id });

        if (removePline)
           tr.EntityErase(new List<ObjectId>() { id });
#else
        //2011新增API
        hatch.AppendLoop(hatchLoopTypes, pts, bluges);
#endif
    }

相关引用

db.Action(tr=> 本博客参考:cad.net 委托的学习 无返回值写法

BulgeVertexWidth 本博客参考

效果

控制台

class Program
{
    static void Main(string[] args)
    {
        var desktop = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
        var msg = "https://www.cnblogs.com/JJBox";
        {
            var qr = new QRCodeEncoder(msg);
            qr.Build();
            qr.BuildBitmap();
            qr.SaveBitmap(desktop + @"\QRCode.jpg");
        }

        msg = "https://www.cnblogs.com/JJBox/p/14485956.html";
        {
            var qr = new QRCodeEncoder(msg);
            qr.Build();
            qr.BuildBitmap();
            qr.SaveBitmap(desktop + @"\QRCode2.jpg");
        }
    }
}

(完)