c#中基于ZXing组件 生成和解析：条形码和二维码

c#中生成和解析条形码和二维码的组件有很多，这里推荐使用ZXing组件，都可以实现。今天就来实现这个功能，界面如下所示。

调用代码如下，比较简单，就不过多描述了

public partial class FormGeneQRCode : FormBase
{
    public FormGeneQRCode()
    {
        InitializeComponent();
    }

    public override void LoadData()
    {
        //设置页面标题
        this.SetFormTitle(this.Text);

        ////加载工具栏
        //List<ToolItemModel> toolItems = new List<ToolItemModel>();
        //toolItems.Add(new ToolItemModel() { ButtonID = "Close", ButtonText = "关闭", ButtonParentID = "Root", EditType = ToolItemEditType.Button.ToString(), ImageKey = IconName.ToolItemClose.ToString(), HAlign = HAlignment.Right.ToString() });
        //FormUIHelper.CreateToolBar(this, this.toolBar, toolItems, this.ImageList16, false);

        //绑定事件
        this.fmImage.ButtonClick += this.OnDevButtonEditButtonClickEventHandler;
        this.btnGeneCode.Click += this.OnDevButtonClickEventHandler;
        this.btnDecodeCode.Click += this.OnDevButtonClickEventHandler;
    }

    private void FormGeneQRCode_Load(object sender, EventArgs e)
    {
        this.LoadData();
    }

    public override void OnDevButtonEditButtonClickEventHandler(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e)
    {
        ButtonEdit btnEdit = (ButtonEdit)sender;
        if (btnEdit.Name == this.fmImage.Name)
        {
            string imageFileName = FormUIHelper.OpenFileDialog(false, FileExpandName.jpeg.ToString());
            this.fmImage.Text = imageFileName;
        }
    }

    public override void OnDevButtonClickEventHandler(object sender, EventArgs e)
    {
        SimpleButton btn = (SimpleButton)sender;
        if (btn.Name == this.btnGeneCode.Name)
        {
            //获取生成编码类型
            string geneCodeType = FormUIHelper.GetRadioButtonListSelectedValue(this.fmGeneCodeType);
            if (geneCodeType == "BarCode")
            {                    
                string content = this.fmWord.Text.Trim();
                Bitmap bitmap = QRCodeUtil.GeneBarCode(content);

                this.pictureEdit1.Image = bitmap;
            }
            else if (geneCodeType == "QRCode")
            {
                string content = this.fmWord.Text.Trim();
                if (string.IsNullOrEmpty(content)) return;

                Bitmap qrCode = QRCodeUtil.GeneQRCode(content);
                this.pictureEdit1.Image = qrCode;
            }
            else if (geneCodeType == "QRCodeWithImage")
            {
                string content = this.fmWord.Text.Trim();
                if (string.IsNullOrEmpty(content)) return;

                string imageFileName = this.fmImage.Text;
                if (string.IsNullOrEmpty(imageFileName)) return;

                Image image = Image.FromFile(imageFileName);
                Bitmap qrCodeWithImage = QRCodeUtil.GeneQRCodeWithImage(content, image);

                this.pictureEdit1.Image = qrCodeWithImage;
            }
        }
        else if (btn.Name == this.btnDecodeCode.Name)
        {
            string geneCodeType = FormUIHelper.GetRadioButtonListSelectedValue(this.fmGeneCodeType);
            if (geneCodeType == "BarCode") return;

            string content = QRCodeUtil.DecodeQRCode((Bitmap)this.pictureEdit1.Image);
            FormUIHelper.ShowMessage(content);
        }
    }

    public override void OnToolItemButtonClickEventHandler(object sender, EventArgs e)
    {
        //参数检测
        if (sender == null) return;
        ToolStripItem tsi = (ToolStripItem)sender;

        //首先执行父级事件.若执行过则子级不再执行
        base.OnToolItemButtonClickEventHandler(sender, e);
        if (this.ActionIsExecuted == true) return;

        object tag = tsi.Tag;
        if (StringHelper.ObjectIsNullOrEmpty(tag)) tag = "";

        string s = tag.ToString().Trim().ToLower();
        if (s == "close")
        {
            this.Close();
        }
    }
}

用到的QRCodeUtil类

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;

using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;

namespace Tutorial.Core
{
    public class QRCodeUtil
    {
        /// <summary>
        /// 生成条形码
        /// </summary>
        /// <returns></returns>
        public static Bitmap GeneBarCode(string content)
        {
            if (string.IsNullOrEmpty(content))
            {
                throw new ArgumentNullException("content");
            }

            EncodingOptions options = new EncodingOptions()
            {
                Width = 300,
                Height = 300
            };
            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.EAN_13;
            writer.Options = options;

            Bitmap bitmap = writer.Write(content);
            return bitmap;
        }

        /// <summary>
        /// 生成二维码图片
        /// 参考地址:http://www.cnblogs.com/Interkey/p/qrcode.html
        /// </summary>
        /// <param name="contents">要生成二维码包含的信息</param>
        /// <param name="width">生成的二维码宽度（默认300像素）</param>
        /// <param name="height">生成的二维码高度（默认300像素）</param>
        /// <returns>二维码图片</returns>
        public static Bitmap GeneQRCode(string contents, int width = 300, int height = 300)
        {
            if (string.IsNullOrEmpty(contents))
            {
                return null;
            }

            EncodingOptions options = new QrCodeEncodingOptions
            {
                DisableECI = true,
                CharacterSet = "UTF-8",
                Width = width,
                Height = height,
                ErrorCorrection = ErrorCorrectionLevel.H,
            };
            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.QR_CODE;
            writer.Options = options;

            Bitmap bitmap = writer.Write(contents);
            return bitmap;
        }

        /// <summary>
        /// 解析条形码
        /// </summary>
        /// <param name="bitmap"></param>
        /// <returns></returns>
        public static string DecodeBarCode(Bitmap bitmap)
        {
            BarcodeReader reader = new BarcodeReader();
            reader.Options.CharacterSet = "UTF-8";
            Result result = reader.Decode(new Bitmap(bitmap));

            string barCode = result.ToString();
            return barCode;
        }

        /// <summary>
        /// 生成中间带有图片的二维码图片
        /// 参考地址:http://www.cnblogs.com/Interkey/p/qrcode.html
        /// </summary>
        /// <param name="contents">要生成二维码包含的信息</param>
        /// <param name="middleImg">要生成到二维码中间的图片</param>
        /// <param name="width">生成的二维码宽度（默认300像素）</param>
        /// <param name="height">生成的二维码高度（默认300像素）</param>
        /// <returns>中间带有图片的二维码</returns>
        public static Bitmap GeneQRCodeWithImage(string contents, Image middleImg, int width = 300, int height = 300)
        {
            if (string.IsNullOrEmpty(contents))
            {
                return null;
            }
            if (middleImg == null)
            {
                //return null;
                return GeneQRCode(contents);
            }

            //本文地址：http://www.cnblogs.com/Interkey/p/qrcode.html
            //构造二维码写码器
            MultiFormatWriter mutiWriter = 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 = mutiWriter.encode(contents, BarcodeFormat.QR_CODE, width, height, hint);
            BarcodeWriter barcodeWriter = new BarcodeWriter();
            Bitmap bitmap = 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();

            //计算插入图片的大小和位置
            int middleImgW = Math.Min((int)(rectangle[2] / 3.5), middleImg.Width);
            int middleImgH = Math.Min((int)(rectangle[3] / 3.5), middleImg.Height);
            int middleImgL = (bitmap.Width - middleImgW) / 2;
            int middleImgT = (bitmap.Height - middleImgH) / 2;

            //将img转换成bmp格式，否则后面无法创建 Graphics对象
            Bitmap bmpimg = new Bitmap(bitmap.Width, bitmap.Height, System.Drawing.Imaging.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(bitmap, 0, 0);
            }

            //在二维码中插入图片
            Graphics myGraphic = Graphics.FromImage(bmpimg);

            //白底
            myGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
            myGraphic.DrawImage(middleImg, middleImgL, middleImgT, middleImgW, middleImgH);
            return bmpimg;
        }

        /// <summary>
        /// 解析二维码
        /// </summary>
        /// <param name="bitmap"></param>
        /// <returns></returns>
        public static string DecodeQRCode(Bitmap bitmap)
        {
            IBarcodeReader reader = new BarcodeReader();
            Result result = reader.Decode(bitmap);

            string codeType = result.BarcodeFormat.ToString();
            string codeContent = result.Text;

            return codeContent;
        }
    }
}

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