C#使用Zxing.dll组件解析二维码

1.首先下载Zxing.dll组件，将dll组件放置debug文件夹中，引用参考，引入空间命名。

2.解码方法

       string result = string.Empty;
        //--解码
        private string RQDecode(Bitmap img)
        {
            string errText = string.Empty;
            Result result = null;
            if (img != null)
            {
                try
                {
                    result = new BarcodeReader().Decode(new Bitmap(pictureBox1.Image));
                    string barCodeStr = result.ToString();
                    labelBarCodeResult.Text = "识别结果是:" + barCodeStr;
                    //listBox1.Items.Add(barCodeStr);
                }
                catch { return errText; }
                if (result != null)
                {
                    return result.Text;
                }
                else
                {
                    return errText;
                }
            }
            else
            {
                return errText;
            }
        }

3.全部源码

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;
using ZXing;


namespace Code_test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private string pathname = string.Empty;//定义路径名变量
        private void button1_Click(object sender, EventArgs e)
        {
            DialogOperate openfile = new DialogOperate();//实例化对象
            textBox1.Text = openfile.OpenFile();//调用方法,显示图片路径
            pathname = textBox1.Text;//获取文件路径
             if (pathname != string.Empty)//这个判断用处不大
            {
                try
                {
                   this.pictureBox1.Load(pathname);//加载图片路径
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }

        }
        
        string result = string.Empty;
        //--解码
        private string RQDecode(Bitmap img)
        {
            string errText = string.Empty;
            Result result = null;
            if (img != null)
            {
                try
                {
                    result = new BarcodeReader().Decode(new Bitmap(pictureBox1.Image));
                    string barCodeStr = result.ToString();
                    labelBarCodeResult.Text = "识别结果是:" + barCodeStr;
                    //listBox1.Items.Add(barCodeStr);
                }
                catch { return errText; }
                if (result != null)
                {
                    return result.Text;
                }
                else
                {
                    return errText;
                }
            }
            else
            {
                return errText;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            RQDecode(new Bitmap(pictureBox1.Image));//开始解析
        }
    }
}

4.效果图