在linux下生成和识别二维码,试了大半天,找到个库测试通过可以使用
ThoughtWorks.QRCodCore
其它的库有些仅在window下可用,有些使用困难
这里如果你在linux下跑的话,一定要安装
skiaSharp.NativeAssets.Linux 库
不然在window下正常,在linux下会报错
测试的时候提示报错如下
unable to load shared library libgdiplus or one of its dependencies
缺少图型库 libgdiplus
运行指令安装 解决
apt-get update && apt-get install -y apt-utils libgdiplus libc6-dev
上代码:
生成二维码:
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Text;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
namespace Service.QRcode
{
public class QRcodeThoughtWorks
{
public void test()
{
string filename = AppDomain.CurrentDomain.BaseDirectory + "/" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg";
//生成
CreateQRImg(@"test", filename);
// Thread.Sleep(2000);
//读
string result = GetImageFile(filename);
Console.WriteLine("结果:" + result);
}
/// <summary>
/// 生成并保存二维码图片的方法
/// </summary>
/// <param name="str">输入的内容</param>
private void CreateQRImg(string str, string filename)
{
Bitmap bt;
string enCodeString = str;
//生成设置编码实例
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeBackgroundColor = Color.White;//设置二维码背景颜色
qrCodeEncoder.QRCodeForegroundColor = Color.Black;//设置二维码前景色
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;//设置二维码编码类型
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//设置二维码拍错率
qrCodeEncoder.QRCodeScale = 4;//设置二维码的大小
qrCodeEncoder.QRCodeVersion = 7;//设置二维码的版本
//Bitmap bmp = qRCodeEncoder.Encode(str);
设置二维码的规模 默认 4
//qrCodeEncoder.QRCodeScale = 4;
设置二维码的版本 默认 7
//qrCodeEncoder.QRCodeVersion = 7;
设置错误检验级别 默认为中等
//qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
//生成二维码图片
bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
//二维码图片名称
bt = RedrawQrImg(bt);
//保存二维码图片在photos路径下
bt.Save(@"" + filename);
//图片控件要显示的二维码图片路径
}
/// <summary>
/// 将二维码转换成网页可以显示的数据
/// </summary>
/// <param name="qrcode"></param>
/// <returns></returns>
public static string GetQrcodeImageData(string qrcode)
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
qrCodeEncoder.QRCodeScale = 12;
qrCodeEncoder.QRCodeVersion = 2;
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
var bmp = qrCodeEncoder.Encode(qrcode);
byte[] b = null;
using (MemoryStream stream = new MemoryStream())
{
bmp.Save(stream, ImageFormat.Jpeg);//将图像以指定的格式存入缓存内存流
b = new byte[stream.Length];
stream.Position = 0;
stream.Read(b, 0, Convert.ToInt32(b.Length));
}
return "data:image/jpeg;base64," + Convert.ToBase64String(b);
}
/// <summary>
/// 对二维码图片进行处理
/// </summary>
/// <param name="QrImg">二维码</param>
/// <returns>处理过后的二维码</returns>
public Bitmap RedrawQrImg(Bitmap QrImg)
{
Bitmap bitmap = new Bitmap(QrImg.Width + 3, QrImg.Height + 3);
Graphics g = Graphics.FromImage(bitmap);
g.Clear(Color.White);
g.DrawRectangle(new Pen(Color.White), new Rectangle(0, 0, bitmap.Width, bitmap.Height));
g.DrawImage(QrImg, new PointF(2, 2));
return bitmap;
}
/// <summary>
/// 二维码解码
/// </summary>
/// <param name="filePath">图片路径</param>
/// <returns></returns>
public static string GetImageFile(string filePath)
{
try
{
if (!File.Exists(filePath))
return "not filepath";
Bitmap myBitmap = new Bitmap(Image.FromFile(filePath));
QRCodeDecoder decoder = new QRCodeDecoder();
string decodedString = decoder.decode(new QRCodeBitmapImage(myBitmap), Encoding.UTF8);
return decodedString;
}
catch (Exception ex)
{
return ex.ToString();
}
}
}
}
复制即可使用
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