PDFsharp支持 在pdf文档里生成矢量格式的二维码， 单支持的条码格式比较少，不支持常用的93码和二维码等。
ZXing 支持的条码多，但无法在PDFsharp里直接绘制矢量格式的图形。
这里一个扩展就可以 在PDFsharp里绘制ZXing生成的条形码矢量图了。
使用方法：
using PdfSharp.Drawing;
using PdfSharp.Pdf;
using ZXing;
using ZXing.Common;
using Extensions; //引入扩展PdfDocument newDocument = new PdfDocument(); // 创建pdf文档
PdfPage page = newDocument.AddPage(); //添加页面
XGraphics gfx = XGraphics.FromPdfPage(page);
var barcodeWriter = new ZXing.BarcodeWriterGeneric
{Format = BarcodeFormat.CODE_93, //条码格式Options = new EncodingOptions { Height = 80, Width = 200 } //条码尺寸
};
var bitMatrix = barcodeWriter.Encode("24341873"); //条码内容
gfx.DrawBitMatrix(bitMatrix, new XPoint(100, 100)); //绘制条码
newDocument.Save("output.pdf"); //保存文件
newDocument.Close();
扩展： XGraphicsExtensions.cs
using PdfSharp.Drawing;
using ZXing.Common;
namespace Extensions
{public static class XGraphicsExtensions{public static void DrawBitMatrix(this XGraphics gfx, BitMatrix matrix, XPoint offset){if (matrix == null)return;int width = matrix.Width;int height = matrix.Height;var processed = new BitMatrix(width, height);bool currentIsBlack = false;int startPosX = 0;int startPosY = 0;//test border//gfx.DrawRectangle(new XPen(XColor.FromArgb(0, 0, 0), 0.5), new XRect(offset.X, offset.Y, matrix.Width, matrix.Height));for (int x = 0; x < width; x++){int endPosX;for (int y = 0; y < height; y++){if (processed[x, y])continue;processed[x, y] = true;if (matrix[x, y]){if (!currentIsBlack){startPosX = x;startPosY = y;currentIsBlack = true;}}else{if (currentIsBlack){FindMaximumRectangle(matrix, processed, startPosX, startPosY, y, out endPosX);var rect = new XRect(startPosX + offset.X, startPosY + offset.Y, endPosX - startPosX + 1, y - startPosY);gfx.DrawRectangle(XBrushes.Black, rect);currentIsBlack = false;}}}if (currentIsBlack){FindMaximumRectangle(matrix, processed, startPosX, startPosY, height, out endPosX);var rect = new XRect(startPosX + offset.X, startPosY + offset.Y, endPosX - startPosX + 1, height - startPosY);gfx.DrawRectangle(XBrushes.Black, rect);currentIsBlack = false;}}}private static void FindMaximumRectangle(BitMatrix matrix, BitMatrix processed, int startPosX, int startPosY, int endPosY, out int endPosX){endPosX = startPosX;for (int x = startPosX + 1; x < matrix.Width; x++){for (int y = startPosY; y < endPosY; y++){if (!matrix[x, y]){return;}}endPosX = x;for (int y = startPosY; y < endPosY; y++){processed[x, y] = true;}}}}
}
