使用Zxing生成二维码_使用zxing生成二维码提示非gs1标准

1.指定大小文本生成二维码

private Bitmap GetQRCodeByZXingNet(String strMessage, Int32 width, Int32 height)
{
	Bitmap result = null;
	try
	{
		BarcodeWriter barCodeWriter = new BarcodeWriter();
		barCodeWriter.Format = BarcodeFormat.QR_CODE;
		barCodeWriter.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
		barCodeWriter.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);
		barCodeWriter.Options.Height = height;
		barCodeWriter.Options.Width = width;
		barCodeWriter.Options.Margin = 0;
		BitMatrix bm = barCodeWriter.Encode(strMessage);
		result = barCodeWriter.Write(bm);
	}
	catch (Exception ex)
	{
		//异常输出
	}
	return result;
}

2.生成中间带特定图标的二维码

public static Bitmap GeneratorQrImage(string contents, Image middleImg, int width = 300, int height = 300)
{
	try
	{
		//构造二维码写码器
		MultiFormatWriter mutiWriter = new MultiFormatWriter();
		Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
		hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
		hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
 
		//生成二维码
		BitMatrix bm = mutiWriter.encode(contents, BarcodeFormat.QR_CODE, width, height, hint);
		BarcodeWriter barcodeWriter = new BarcodeWriter();
		Bitmap bitmap = barcodeWriter.Write(bm);
 
		//获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
		int[] rectangle = bm.getEnclosingRectangle();
 
		//计算插入图片的大小和位置
		int middleImgW = Math.Min((int)(rectangle[2] / 3.5), middleImg.Width);
		int middleImgH = Math.Min((int)(rectangle[3] / 3.5), middleImg.Height);
		int middleImgL = (bitmap.Width - middleImgW) / 2;
		int middleImgT = (bitmap.Height - middleImgH) / 2;
 
		//将img转换成bmp格式，否则后面无法创建 Graphics对象
		Bitmap bmpimg = new Bitmap(bitmap.Width, bitmap.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
		using (Graphics g = Graphics.FromImage(bmpimg))
		{
			g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
			g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
			g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
			g.DrawImage(bitmap, 0, 0);
		}
 
		//在二维码中插入图片
		Graphics myGraphic = Graphics.FromImage(bmpimg);
		//白底
		myGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
		myGraphic.DrawImage(middleImg, middleImgL, middleImgT, middleImgW, middleImgH);
		return bmpimg;
	}
	catch (Exception ex)
	{
		//异常输出
	}
	return null;
}