基于ZXing.NET实现的二维码生成和识别客户端

农码工 05-15 294

前言：

目前兄弟们对“net core 二维码”都比较着重，兄弟们都想要剖析一些“net core 二维码”的相关资讯。那么小编也在网络上汇集了一些关于“net core 二维码””的相关内容，希望看官们能喜欢，我们一起来学习一下吧！

一、前言

ZXing.Net的一个可移植软件包，是一个开源的、多格式的1D/2D条形码图像处理库，最初是用Java实现的。已经过大量优化和改进，它已经被手动移植。它与.Net 2.0、.Net 3.5、.Net 4.x、.Net 5.x、.Net 6.x、.Net 7.x、Windows RT类库和组件、UWP、.Net Standard 1.x和2.0x、.Net Core App 3.x、Silverlight 4、Silverlight 5、Windows Phone 7.x和Windows Phone 8.x以及Xamarin.Android兼容。

二、项目环境和搭建

项目框架：.NET Framework 4.6.1

项目依赖：ZXing.Net

项目结构和界面设计：

三、实现核心代码

ZXing帮助类

 /// <summary> /// ZXing.NET 二维码帮助类 /// </summary> public class ZXingHelper {     /// <summary>     /// 站点二维码的目录     /// </summary>     private static string QRCodeDirectory = "QRCode";     /// <summary>     /// 使用zxing动态库生成二维码     /// </summary>     /// <param name="conetnt">二维码内容</param>     /// <param name="errorMessage">异常信息</param>     /// <param name="logoPath">logo图片路径，默认为空。为空时生成的二维码不带logo</param>     /// <param name="height">二维码图片高度，默认240 单位 pixels</param>     /// <param name="width">二维码图片宽度，默认240 单位 pixels</param>     /// <param name="margin">二维码图片边距，默认为0</param>     /// <returns></returns>     public static Bitmap GenerateQRCode(string conetnt, out string errorMessage, string logoPath = "", int height = 240, int width = 240, int margin = 0)     {         errorMessage = string.Empty;         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 = margin;             BitMatrix bm = barCodeWriter.Encode(conetnt);             Bitmap qrCodeImage = barCodeWriter.Write(bm);             if (!string.IsNullOrEmpty(logoPath))             {                 // 添加Logo                 Bitmap logo = new Bitmap(logoPath);                 int logoSize = (int)(qrCodeImage.Width * 0.2); // Logo大小为二维码大小的1/5                 int logoX = (qrCodeImage.Width - logoSize) / 2;                 int logoY = (qrCodeImage.Height - logoSize) / 2;                 Graphics qrGraphics = Graphics.FromImage(qrCodeImage);                 qrGraphics.DrawImage(logo, new Rectangle(logoX, logoY, logoSize, logoSize));             }             return qrCodeImage;         }         catch (Exception ex)         {             errorMessage = $"Exception raised when generating QRCode,, Exception;{ex}";             return null;         }     }     /// <summary>     /// 使用zxing动态库解析:二维码，条形码......     /// </summary>     /// <param name="image">二维码图像</param>     /// <returns></returns>     public static string ParseBarCode(Bitmap image)     {         BarcodeReader reader = new BarcodeReader();         Result result = reader.Decode(image);         return result.Text;     }     /// <summary>     /// 使用zxing动态库生成二维码     /// </summary>     /// <param name="conetnt">二维码内容</param>     /// <param name="logoPath">logo图片路径，默认为空。为空时生成的二维码不带logo</param>     /// <param name="height">二维码图片高度，默认240 单位 pixels</param>     /// <param name="width">二维码图片宽度，默认240 单位 pixels</param>     /// <param name="margin">二维码图片边距，默认为0</param>     /// <returns></returns>     public static void GenerateQRCode(string conetnt, string logoPath = "", int height = 240, int width = 240, int margin = 0)     {         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 = margin;             BitMatrix bm = barCodeWriter.Encode(conetnt);             Bitmap qrCodeImage = barCodeWriter.Write(bm);             if (!string.IsNullOrEmpty(logoPath))             {                 // 添加Logo                 Bitmap logo = new Bitmap(logoPath);                 int logoSize = (int)(qrCodeImage.Width * 0.2); // Logo大小为二维码大小的1/5                 int logoX = (qrCodeImage.Width - logoSize) / 2;                 int logoY = (qrCodeImage.Height - logoSize) / 2;                 Graphics qrGraphics = Graphics.FromImage(qrCodeImage);                 qrGraphics.DrawImage(logo, new Rectangle(logoX, logoY, logoSize, logoSize));             }             string qrCodeFile = AppDomain.CurrentDomain.BaseDirectory + QRCodeDirectory + "/" + "qrcode.jpg";             if (File.Exists(qrCodeFile))             {                 File.Delete(qrCodeFile);             }             qrCodeImage.Save(qrCodeFile, System.Drawing.Imaging.ImageFormat.Jpeg);//保存二维码图片         }         catch (Exception ex)         {         }     } }

选择logo

    /// <summary>    /// 选择logo    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void btn_selectlogo_Click(object sender, EventArgs e)    {        try        {            OpenFileDialog openFileDialog = new OpenFileDialog();            openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);//初始路径为桌面            openFileDialog.Filter = "Logo图片|*.png;*.jpg;*.jpeg;*.ico";            if (openFileDialog.ShowDialog() == DialogResult.OK)            {                picLogo.Image = Image.FromFile(openFileDialog.FileName);                logPath = openFileDialog.FileName;//logo文件路径            }        }        catch (Exception ex)        {            MessageBox.Show(ex.Message);        }    }

生成二维码

  /// <summary>  /// 生成二维码  /// </summary>  /// <param name="sender"></param>  /// <param name="e"></param>  private void bt_generate_Click(object sender, EventArgs e)  {      try      {          string errorMsg = "";          string content = rtbQRCodeContent.Text;          if (string.IsNullOrWhiteSpace(content))          {              MessageBox.Show("二维码内容不能为空！");              return;          }          picQRCode.Image = ZXingHelper.GenerateQRCode(content, out errorMsg, logPath);          if (!string.IsNullOrWhiteSpace(errorMsg))          {              MessageBox.Show(errorMsg);          }      }      catch (Exception ex)      {          MessageBox.Show(ex.Message);      }  }

识别二维码

  /// <summary>  /// 识别二维码  /// </summary>  /// <param name="sender"></param>  /// <param name="e"></param>  private void btn_identityQrCode_Click(object sender, EventArgs e)  {      try      {          if (picQRCode.Image == null)          {              MessageBox.Show("请先生成二维码！");              return;          }          Bitmap Imagemap = new Bitmap(picQRCode.Image);          string QRCodeResult = ZXingHelper.ParseBarCode(Imagemap);          rtbQRCodeResult.Text = QRCodeResult;      }      catch (Exception ex)      {          MessageBox.Show(ex.Message);      }  }

保存二维码

  /// <summary>  /// 保存二维码  /// </summary>  /// <param name="sender"></param>  /// <param name="e"></param>  private void btn_save_Click(object sender, EventArgs e)  {      try      {          if (picQRCode.Image == null)          {              MessageBox.Show("请先生成二维码！");              return;          }          SaveFileDialog saveFileDialog = new SaveFileDialog();          saveFileDialog.Filter = "保存图片|*.png;*.jpg;*.jpeg";          if (saveFileDialog.ShowDialog() == DialogResult.OK)          {              picQRCode.Image.Save(saveFileDialog.FileName, ImageFormat.Png);              MessageBox.Show("保存成功！");          }      }      catch (Exception ex)      {          MessageBox.Show(ex.Message);      }  }

四、实现演示

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标签： #net core 二维码