CAD .NET 二次开发 cad线条绘制二维码

要在CAD中绘制二维码，您可以使用以下步骤：

1. 在CAD中创建一个新的图层，用于绘制二维码。

2. 使用CAD .NET API中的Line对象绘制二维码的线条。

3. 通过调用Graphics.DrawLines方法将线条绘制到CAD中。

4. 通过二维码生成库将文本转换为二维码，然后将其分解为线条并将其绘制到CAD中。

以下是一个示例代码，用于在CAD中绘制二维码：

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.Geometry;
using Autodesk.AutoCAD.Runtime;
using ZXing;
using ZXing.Common;

namespace CadQRCode
{
public class QRCode
{
[CommandMethod("DrawQRCode")]
public void DrawQRCode()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;

// Prompt the user to enter the text to encode
PromptStringOptions pso = new PromptStringOptions("\nEnter the text to encode: ");
PromptResult pr = doc.Editor.GetString(pso);

if (pr.Status != PromptStatus.OK)
{
return;
}

// Generate the QR code from the entered text
BarcodeWriter writer = new BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new EncodingOptions
{
Height = 200,
Width = 200,
Margin = 0
}
};

BitMatrix bitMatrix = writer.Encode(pr.StringResult);

// Create a new layer for the QR code
using (Transaction trans = db.TransactionManager.StartTransaction())
{
LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForRead);
ObjectId layerId;

if (!lt.Has("QRCode"))
{
LayerTableRecord ltr = new LayerTableRecord
{
Name = "QRCode",
Color = Color.FromColorIndex(ColorMethod.ByAci, 1)
};

layerId = lt.Add(ltr);
trans.AddNewlyCreatedDBObject(ltr, true);
}
else
{
layerId = lt["QRCode"];
}

// Create a new Polyline object to hold the lines of the QR code
Polyline qrCode = new Polyline();

qrCode.Layer = layerId;

// Loop through the rows and columns of the bit matrix to create the lines of the QR code
for (int y = 0; y < bitMatrix.Height; y++)
{
for (int x = 0; x < bitMatrix.Width; x++)
{
if (bitMatrix[x, y])
{
qrCode.AddVertexAt(qrCode.NumberOfVertices, new Point2d(x, y), 0, 0, 0);
}
}
}

// Add the polyline to the drawing
BlockTableRecord btr = (BlockTableRecord)trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
btr.AppendEntity(qrCode);
trans.AddNewlyCreatedDBObject(qrCode, true);

trans.Commit();
}
}
}
}

此代码使用ZXing库生成二维码，并使用Polyline对象将其绘制到CAD中。请注意，此代码使用了一个名为“QRCode”的新图层来存储绘制的线条。如果您希望绘制到不同的图层，请更改代码中的图层名称。