QRCodeHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Drawing; // 添加位图引用,需引用System.Drawing.dll
using System.Runtime.InteropServices;
using System.Drawing.Imaging;
using Microsoft.Win32;
using Utils.Helper.TXT;
using ZXing; // 添加二维码,zxing.dll
using ZXing.QrCode;
using ZXing.Common;
using ZXing.Rendering;
using ZXing.QrCode.Internal;

namespace Utils.Helper.QRCode
{
    /// <summary>
    /// 二维码帮助类
    /// 创建日期:2017年6月6日
    /// </summary>
    public class QRCodeHelper
    {
        /// <summary>
        /// 注销对象方法 API
        /// </summary>
        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr o);

        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="strContent">二维码文本</param>
        /// <param name="iWidth">二维码宽度</param>
        /// <param name="iHeigth">二维码高度</param>
        /// <returns>二维码位图</returns>
        public static Bitmap GetQRCode(string strContent, int iWidth, int iHeigth)
        {
            try
            {
                // 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);
                hint.Add(EncodeHintType.MARGIN, 1);
                // 生成二维码 
                BitMatrix bitMatrix = writer.encode(strContent, BarcodeFormat.QR_CODE, iWidth, iHeigth, hint);
                BarcodeWriter barcodeWriter = new BarcodeWriter();
                Bitmap bitmapQRCode = barcodeWriter.Write(bitMatrix);
                // 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 = bitMatrix.getEnclosingRectangle();
                // 将 img 转换成 bmp 格式，否则后面无法创建 Graphics 对象
                Bitmap bitmapQRCodeBMP = new Bitmap(bitmapQRCode.Width, bitmapQRCode.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                using (Graphics g = Graphics.FromImage(bitmapQRCodeBMP))
                {
                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                    g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                    g.DrawImage(bitmapQRCode, 0, 0);
                }
                return bitmapQRCodeBMP;
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return null;
            }
        }

        /// <summary>
        /// 生成二维码(带LOGO)
        /// </summary>
        /// <param name="strContent">二维码文本</param>
        /// <param name="iWidth">二维码宽度</param>
        /// <param name="iHeigth">二维码高度</param>
        /// <param name="strLogoPath">LOGO 图片路径</param>
        /// <returns>二维码位图</returns>
        public static Bitmap GetQRCode_logo(string strContent, int iWidth, int iHeigth, string strLogoPath)
        {
            try
            {
                // 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);
                hint.Add(EncodeHintType.MARGIN, 1);
                // 生成二维码 
                BitMatrix bitMatrix = writer.encode(strContent, BarcodeFormat.QR_CODE, iWidth, iHeigth, hint);
                BarcodeWriter barcodeWriter = new BarcodeWriter();
                Bitmap bitmapQRCode = barcodeWriter.Write(bitMatrix);
                // 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 = bitMatrix.getEnclosingRectangle();
                // 将 img 转换成 bmp 格式，否则后面无法创建 Graphics 对象
                Bitmap bitmapQRCodeBMP = new Bitmap(bitmapQRCode.Width, bitmapQRCode.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                using (Graphics g = Graphics.FromImage(bitmapQRCodeBMP))
                {
                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                    g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                    g.DrawImage(bitmapQRCode, 0, 0);
                }
                // 获得 LOGO 位图并计算插入图片的大小和位置
                Bitmap bitmapLogo = new Bitmap(strLogoPath);
                int middleW = Math.Min((int)(rectangle[2] / 3.5), bitmapLogo.Width);
                int middleH = Math.Min((int)(rectangle[3] / 3.5), bitmapLogo.Height);
                int middleL = (bitmapQRCode.Width - middleW) / 2;
                int middleT = (bitmapQRCode.Height - middleH) / 2;
                // 将二维码插入图片(白底)
                Graphics myGraphic = Graphics.FromImage(bitmapQRCodeBMP);
                myGraphic.DrawImage(bitmapLogo, middleL, middleT, middleW, middleH);
                return bitmapQRCodeBMP;
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return null;
            }
        }

        /// <summary>
        /// 从位图获取图像源
        /// </summary>
        /// <param name="bitmapQRCode">位图二维码</param>
        /// <returns>图像源(用以显示在控件上)</returns>
        public static ImageSource GetImageSourceFromBitmap(Bitmap bitmapQRCode)
        {
            try
            {
                IntPtr ipQRCode = bitmapQRCode.GetHbitmap();
                BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(ipQRCode, IntPtr.Zero, Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
                DeleteObject(ipQRCode);
                return bitmapSource;
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return null;
            }
        }

        /// <summary>
        /// 识别二维码和条形码
        /// </summary>
        /// <param name="bitmapQRCode">二维码和条形码位图</param>
        /// <returns>成功返回二维码和条形码内容,失败返回NULL或Empty</returns>
        public static string BarcodeReader(Bitmap bitmapQRCode)
        {
            try
            {
                BarcodeReader barcodeReader = new BarcodeReader();
                barcodeReader.Options.CharacterSet = "UTF-8";
                Result resultQRCode = barcodeReader.Decode(bitmapQRCode);
                if (resultQRCode == null)
                {
                    return string.Empty;
                }
                else
                {
                    return resultQRCode.Text;
                }
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return null;
            }
        }

        /// <summary>
        /// 识别二维码和条形码
        /// </summary>
        /// <param name="strQRCodePath">二维码和条形码文件路径</param>
        /// <returns>成功返回二维码和条形码内容,失败返回NULL或Empty</returns>
        public static string BarcodeReader(string strQRCodePath)
        {
            try
            {
                BarcodeReader barcodeReader = new BarcodeReader();
                barcodeReader.Options.CharacterSet = "UTF-8";
                Bitmap bitmapQRCode = new Bitmap(strQRCodePath);
                Result resultQRCode = barcodeReader.Decode(bitmapQRCode);
                if (resultQRCode == null)
                {
                    return string.Empty;
                }
                else
                {
                    return resultQRCode.Text;
                }
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return null;
            }
        }

        /// <summary>
        /// 保存二维码和条形码位图到指定位置
        /// </summary>
        /// <param name="strSavePath">文件保存位置</param>
        /// <param name="bitmapQRCode">二维码和条形码位图</param>
        /// <returns>成功返回true,失败返回false</returns>
        public static bool SaveBitmap(string strSavePath, Bitmap bitmapQRCode)
        {
            try
            {
                ImageFormat imageFormat;
                switch (System.IO.Path.GetExtension(strSavePath))
                {
                    case ".bmp": imageFormat = ImageFormat.Bmp; break;
                    case ".emf": imageFormat = ImageFormat.Emf; break;
                    case ".exif": imageFormat = ImageFormat.Exif; break;
                    case ".gif": imageFormat = ImageFormat.Gif; break;
                    case ".icon": imageFormat = ImageFormat.Icon; break;
                    case ".jpeg": imageFormat = ImageFormat.Jpeg; break;
                    case ".jpg": imageFormat = ImageFormat.Jpeg; break;
                    case ".memorybmp": imageFormat = ImageFormat.MemoryBmp; break;
                    case ".png": imageFormat = ImageFormat.Png; break;
                    case ".tiff": imageFormat = ImageFormat.Tiff; break;
                    case ".wmf": imageFormat = ImageFormat.Wmf; break;
                    default: imageFormat = ImageFormat.Png; break;
                }
                bitmapQRCode.Save(strSavePath, imageFormat);
                return true;
            }
            catch (Exception ex)
            {
                TXTHelper.Logs(ex.ToString());
                return false;
            }
        }
    }
}