C# - VS2019調用ZXing.NET實現條碼、二維碼和帶有Logo的二維碼生成

前言

C# WinFrm程序調用ZXing.NET實現條碼、二維碼和帶有Logo的二維碼生成。

ZXing.NET導入

GitHub開源庫

ZXing.NET開源庫githib下載地址：https://github.com/zxing/zxing

NuGet包管理

選擇安裝ZXing.NET v0.16.1版本。

前台部署搭建

如下圖，創建WinFrm桌面應用程序后，添加如下必要的控件。

封裝ZXingLibs類

核心代碼如下：

注意條形碼暫時只支持數字（Requested contents should only contain digits, but got 'i'）；

只支持偶數個（The lenght of the input should be even）；

碼值最大長度為80（Requested contents should be less than 80 digits long, but got 102）。

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;

namespace GetBarCodeQRCode_ZXing
{
    /// <summary>
    /// 重新封裝條碼、二維碼生成方法和帶有圖片的二維碼生成方法
    /// </summary>
    public class ZXingLibs
    {
        /// <summary>
        /// 生成二維碼
        /// </summary>
        /// <param name="text">內容</param>
        /// <param name="width">寬度</param>
        /// <param name="height">高度</param>
        /// <returns></returns>
        public static Bitmap GetQRCode(string text, int width, int height)
        {
            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.QR_CODE;
            QrCodeEncodingOptions options = new QrCodeEncodingOptions()
            {
                DisableECI = true,//設置內容編碼
                CharacterSet = "UTF-8",  //設置二維碼的寬度和高度
                Width = width,
                Height = height,
                Margin = 1//設置二維碼的邊距,單位不是固定像素
            };

            writer.Options = options;
            Bitmap map = writer.Write(text);
            return map;
        }

        /// <summary>
        /// 生成一維條形碼
        /// 只支持數字 Requested contents should only contain digits, but got 'i'
        /// 只支持偶數個 The lenght of the input should be even
        /// 最大長度80  Requested contents should be less than 80 digits long, but got 102
        /// </summary>
        /// <param name="text">內容</param>
        /// <param name="width">寬度</param>
        /// <param name="height">高度</param>
        /// <returns></returns>
        public static Bitmap GetBarCode(string text, int width, int height)
        {
            BarcodeWriter writer = new BarcodeWriter();
            //使用ITF 格式，不能被現在常用的支付寶、微信掃出來
            //如果想生成可識別的可以使用 CODE_128 格式
            //writer.Format = BarcodeFormat.ITF;
            writer.Format = BarcodeFormat.CODE_39;
            EncodingOptions options = new EncodingOptions()
            {
                Width = width,
                Height = height,
                Margin = 2
            };
            writer.Options = options;
            Bitmap map = writer.Write(text);
            return map;
        }

        /// <summary>
        /// 生成帶Logo的二維碼
        /// </summary>
        /// <param name="text">內容</param>
        /// <param name="width">寬度</param>
        /// <param name="height">高度</param>
        public static Bitmap GetQRCodeWithLogo(string text, int width, int height)
        {
            //Logo 圖片
            string logoPath = System.AppDomain.CurrentDomain.BaseDirectory + @"\img\logo.bmp";
            Bitmap logo = new Bitmap(logoPath);
            //構造二維碼寫碼器
            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);
            //hint.Add(EncodeHintType.MARGIN, 2);//舊版本不起作用，需要手動去除白邊

            //生成二維碼 
            BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, width + 80, height+80, hint);
            bm = deleteWhite(bm);
            BarcodeWriter barcodeWriter = new BarcodeWriter();
            Bitmap map = barcodeWriter.Write(bm);

            //獲取二維碼實際尺寸（去掉二維碼兩邊空白后的實際尺寸）
            int[] rectangle = bm.getEnclosingRectangle();

            //計算插入圖片的大小和位置
            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.Height - middleH) / 2;

            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, width, height);
                //白底將二維碼插入圖片
                g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
                g.DrawImage(logo, middleL, middleT, middleW, middleH);
            }
            return bmpimg;
        }

        /// <summary>
        /// 刪除默認對應的空白
        /// </summary>
        /// <param name="matrix"></param>
        /// <returns></returns>
        private static BitMatrix deleteWhite(BitMatrix matrix)
        {
            int[] rec = matrix.getEnclosingRectangle();
            int resWidth = rec[2] + 1;
            int resHeight = rec[3] + 1;

            BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
            resMatrix.clear();
            for (int i = 0; i < resWidth; i++)
            {
                for (int j = 0; j < resHeight; j++)
                {
                    if (matrix[i + rec[0], j + rec[1]])
                        resMatrix[i, j] = true;
                }
            }
            return resMatrix;
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace GetBarCodeQRCode_ZXing
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
        }
        // 實例化ZXingLibs類
        public ZXingLibs zxTools = new ZXingLibs();

        /// <summary>
        /// 清空輸入框內容
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnClear_Click(object sender, EventArgs e)
        {
            this.tbValues.Text = "";
        }

        /// <summary>
        /// 生成條碼
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnBarCode_Click(object sender, EventArgs e)
        {
            if (this.tbValues.Text.ToString().Trim() != "")
            {
                this.pbImage.Image = ZXingLibs.GetBarCode(this.tbValues.Text.ToString(), this.pbImage.Width, this.pbImage.Height);
            }
        }

        /// <summary>
        /// 生成二維碼
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnQRCode_Click(object sender, EventArgs e)
        {
            if (this.tbValues.Text.ToString().Trim() != "")
            {
                this.pbImage.Image = ZXingLibs.GetQRCode(this.tbValues.Text.ToString(), this.pbImage.Width, this.pbImage.Height);
            }
        }

        /// <summary>
        /// 生成帶有Logo的二維碼
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnGetQRCodeWithLogo_Click(object sender, EventArgs e)
        {
            this.pbImage.Image = ZXingLibs.GetQRCodeWithLogo(this.tbValues.Text.ToString(), this.pbImage.Width, this.pbImage.Height);
        }
    }
}

實現效果

參考資料 GitHub 

  作者：Jeremy.Wu
  出處：https://www.cnblogs.com/jeremywucnblog/
  本文版權歸作者和博客園共有，歡迎轉載，但未經作者同意必須保留此段聲明，且在文章頁面明顯位置給出原文連接，否則保留追究法律責任的權利。