C# ZXing 二维码条形码生成识别
- 安装ZXing
- 使用ZXing
- 生成条形码
- 生成二维码
- 生成带Logo的二维码
- 识别二维码、条形码
安装ZXing
NuGet搜索ZXing安装ZXing.Net包
使用ZXing
using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;
生成条形码
/// <summary>
/// 生成条形码
/// </summary>
/// <param name="text"></param>
static void GenerateBarCode(string text)
{
BarcodeWriter writer = new BarcodeWriter();
writer.Format = BarcodeFormat.CODE_128;
EncodingOptions options = new EncodingOptions()
{
Width = 150,
Height = 50,
Margin = 2,
};
writer.Options = options;
Bitmap map = writer.Write(text);
string filename = @"D:\2.png";
map.Save(filename, ImageFormat.Png);
map.Dispose();
}
生成二维码
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="text"></param>
static void GenerateQRCode(string text)
{
BarcodeWriter writer = new BarcodeWriter();
writer.Format = BarcodeFormat.QR_CODE;
QrCodeEncodingOptions options = new QrCodeEncodingOptions();
options.DisableECI = true;
// 设置内容字符编码
options.CharacterSet = "UTF-8";
// 设置二维码的宽度高度
options.Width = 200;
options.Height = 200;
// 设置二维码的边距,单位不是固定像素
options.Margin = 1;
writer.Options = options;
Bitmap map = writer.Write(text);
string filename = @"D:\1.png";
map.Save(filename, ImageFormat.Png);
map.Dispose();
}
生成带Logo的二维码
/// <summary>
/// 生成带Logo图片的二维码
/// </summary>
/// <param name="text"></param>
static void GenerateQRCodeWithLoge(string text)
{
// Logo 图片
Bitmap logo = new Bitmap(@"D:\logo.png");
// 构造二维码写码器
MultiFormatWriter writer = 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 = writer.encode(text, BarcodeFormat.QR_CODE, 300, 300, hint);
BarcodeWriter barcodeWriter = new BarcodeWriter();
Bitmap map = 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logo图片的大小位置
int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
int middleL = (map.Width - middleW) / 2;
int middleT = (map.Width - middleH) / 2;
// 将img转换成bmp格式,否则后面无法创建Graphics对象
Bitmap bmpimg = new Bitmap(map.Width, map.Height, 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(map, 0, 0);
}
// 将二维码插入图片
Graphics myGraphics = Graphics.FromImage(bmpimg);
// 白底
myGraphics.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
myGraphics.DrawImage(logo, middleL, middleT, middleW, middleH);
// 保存生成图片
bmpimg.Save(@"D:\logo_qrcode.png", ImageFormat.Png);
}
识别二维码、条形码
/// <summary>
/// 识别二维码、条形码
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
static string ReadBarCode(string filename)
{
BarcodeReader reader = new BarcodeReader();
reader.Options.CharacterSet = "UTF-8";
Bitmap map = new Bitmap(filename);
Result result = reader.Decode(map);
map.Dispose();
return result == null ? "" : result.Text;
}