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>>