C#生成和识别二维码

C#生成和识别二维码

用到外部一个DLL文件(ThoughtWorks.QRCode.dll)，看效果

生成截图

识别截图

生成二维码后右键菜单可以保存二维码图片，然后可以到识别模式下进行识别，当然生成后可以用手机扫描识别出来，或者用手机直接扫描以上两张图也能看到识别后的结果。

使用方法，在解决方案中引用上面那个dll文件，引入命名空间

using ThoughtWorks.QRCode.Codec; 
using ThoughtWorks.QRCode.Codec.Data;

看完整的生成二维码代码

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Drawing; 
using System.Data; 
using System.Text; 
using System.Windows.Forms; 
using ThoughtWorks.QRCode.Codec; 
using ThoughtWorks.QRCode.Codec.Data; 
namespace 二维码 
{ 
    public partial class UC_To : UserControl 
    { 
        public UC_To() 
        { 
            InitializeComponent(); 
        } 
           
        private void button1_Click(object sender, EventArgs e) 
        { 
            if (textBox1.Text.Trim() != "") 
            { 
                string enCodeString = textBox1.Text; 
                QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); 
                pictureBox1.Image = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8); 
            } 
            //else 
                //MessageBox.Show("请输入内容"); 
        } 
           
        private void 保存图片ToolStripMenuItem_Click(object sender, EventArgs e) 
        { 
            if (pictureBox1.Image != null) 
            { 
                SaveFileDialog s = new SaveFileDialog(); 
                s.Title = "保存二维码图片"; 
                s.Filter = "图片文件(*.jpg)|*.jpg"; 
                if(s.ShowDialog()==DialogResult.OK) 
                try
                { 
                    pictureBox1.Image.Save(s.FileName,System.Drawing.Imaging.ImageFormat.Jpeg); 
                    MessageBox.Show("保存成功"); 
                } 
                catch { MessageBox.Show("保存失败"); } 
            } 
        } 
    } 
}

看完整的识别二维码的代码

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Drawing; 
using System.Data; 
using System.Text; 
using System.Windows.Forms; 
using ThoughtWorks.QRCode.Codec; 
using ThoughtWorks.QRCode.Codec.Data; 
namespace 二维码 
{ 
    public partial class UC_From : UserControl 
    { 
        public UC_From() 
        { 
            InitializeComponent(); 
        } 
        string filepath = ""; 
        private void button1_Click(object sender, EventArgs e) 
        { 
            OpenFileDialog p = new OpenFileDialog(); 
            p.Title = "请选择二维码文件"; 
            p.Filter = "图片文件(*.jpg)|*.jpg"; 
            p.Multiselect = false; 
            if (p.ShowDialog() == DialogResult.OK) 
            { 
                filepath = p.FileName; 
                System.Threading.Thread t = new System.Threading.Thread(ss); 
                t.IsBackground = true; 
                t.Start(); 
            } 
        } 
        private void ss() 
        { 
            if (filepath != "") 
            { 
                string tt = ""; 
                try
                { 
                    Invoke((EventHandler)delegate
                    { 
                        button1.Enabled = false; 
                        button1.Text = "Waiting！"; 
                        pictureBox1.Image = new Bitmap(filepath); 
                    }); 
                    //pictureBox1.Size = new Size(new Bitmap(filepath).Size.Width, new Bitmap(filepath).Size.Height); 
                    QRCodeDecoder qrDecoder = new QRCodeDecoder(); 
                    string txtMsg = qrDecoder.decode(new QRCodeBitmapImage(new Bitmap(pictureBox1.Image)), Encoding.UTF8); 
                    tt = txtMsg; 
                } 
                catch { tt = "识别失败"; } 
                Invoke((EventHandler)delegate
                { 
                    textBox1.Text = tt; 
                    button1.Enabled = true; 
                    button1.Text = "识别"; 
                }); 
            } 
            System.Threading.Thread.CurrentThread.Abort(); 
        } 
        private void textBox1_KeyPress(object sender, KeyPressEventArgs e) 
        { 
            e.Handled = true; 
        } 
    } 
}

完整源程序及dll文件下载,VS2012+.net2.0>>

C#生成和识别二维码.rar