nuget 安装
DataMatrix.net

//示例
DmtxImageEncoder Die = new DmtxImageEncoder();
DataMatrix.net.DmtxImageEncoderOptions option = new DmtxImageEncoderOptions();
option.SizeIdx = DmtxSymbolSize.DmtxSymbol32x32;//形状
option.MarginSize = 0;//边距
option.ModuleSize = size;//点阵大小
//string txt = "123abc";
Bitmap b = Die.EncodeImage(codeText, option);

            g.DrawImage(b,new Point(pointX, pointY));

内容太长报错：使用 Die.EncodeImage("xxxxxxxxxxxxxxxxxx",2)