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

1 2	using ThoughtWorks.QRCode.Codec; using ThoughtWorks.QRCode.Codec.Data;

看完整的生成二维码代码

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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

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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;         }     } }