用.NET如何生成二维码

namespace WinQRCode 
{ 
 partial class Form1 
 { 
 /// <summary> 
 /// 必需的设计器变量。 
 /// </summary> 
 private System.ComponentModel.IContainer components = null; 
 
 /// <summary> 
 /// 清理所有正在使用的资源。 
 /// </summary> 
 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 
 protected override void Dispose(bool disposing) 
 { 
 if (disposing && (components != null)) 
 { 
 components.Dispose(); 
 } 
 base.Dispose(disposing); 
 } 
 
 #region Windows 窗体设计器生成的代码 
 
 /// <summary> 
 /// 设计器支持所需的方法 - 不要 
 /// 使用代码编辑器修改此方法的内容。 
 /// </summary> 
 private void InitializeComponent() 
 { 
 this.button1 = new System.Windows.Forms.Button(); 
 this.button2 = new System.Windows.Forms.Button(); 
 this.pictureBox1 = new System.Windows.Forms.PictureBox(); 
 this.label1 = new System.Windows.Forms.Label(); 
 this.textBox1 = new System.Windows.Forms.TextBox(); 
 this.label2 = new System.Windows.Forms.Label(); 
 this.lbl解码信息 = new System.Windows.Forms.Label(); 
 ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit(); 
 this.SuspendLayout(); 
 // 
 // button1 
 // 
 this.button1.Location = new System.Drawing.Point(446, 31); 
 this.button1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5); 
 this.button1.Name = "button1"; 
 this.button1.Size = new System.Drawing.Size(103, 37); 
 this.button1.TabIndex = 0; 
 this.button1.Text = "编码"; 
 this.button1.UseVisualStyleBackColor = true; 
 this.button1.Click += new System.EventHandler(this.button1_Click); 
 // 
 // button2 
 // 
 this.button2.Location = new System.Drawing.Point(446, 81); 
 this.button2.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5); 
 this.button2.Name = "button2"; 
 this.button2.Size = new System.Drawing.Size(103, 37); 
 this.button2.TabIndex = 1; 
 this.button2.Text = "解码"; 
 this.button2.UseVisualStyleBackColor = true; 
 this.button2.Click += new System.EventHandler(this.button2_Click); 
 // 
 // pictureBox1 
 // 
 this.pictureBox1.Location = new System.Drawing.Point(23, 117); 
 this.pictureBox1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5); 
 this.pictureBox1.Name = "pictureBox1"; 
 this.pictureBox1.Size = new System.Drawing.Size(279, 253); 
 this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; 
 this.pictureBox1.TabIndex = 2; 
 this.pictureBox1.TabStop = false; 
 // 
 // label1 
 // 
 this.label1.AutoSize = true; 
 this.label1.Location = new System.Drawing.Point(18, 39); 
 this.label1.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0); 
 this.label1.Name = "label1"; 
 this.label1.Size = new System.Drawing.Size(69, 25); 
 this.label1.TabIndex = 3; 
 this.label1.Text = "信息："; 
 // 
 // textBox1 
 // 
 this.textBox1.Location = new System.Drawing.Point(95, 37); 
 this.textBox1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5); 
 this.textBox1.Name = "textBox1"; 
 this.textBox1.Size = new System.Drawing.Size(333, 31); 
 this.textBox1.TabIndex = 4; 
 // 
 // label2 
 // 
 this.label2.AutoSize = true; 
 this.label2.Location = new System.Drawing.Point(18, 81); 
 this.label2.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0); 
 this.label2.Name = "label2"; 
 this.label2.Size = new System.Drawing.Size(88, 25); 
 this.label2.TabIndex = 5; 
 this.label2.Text = "二维码："; 
 // 
 // lbl解码信息 
 // 
 this.lbl解码信息.AutoSize = true; 
 this.lbl解码信息.Location = new System.Drawing.Point(101, 81); 
 this.lbl解码信息.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0); 
 this.lbl解码信息.Name = "lbl解码信息"; 
 this.lbl解码信息.Size = new System.Drawing.Size(0, 25); 
 this.lbl解码信息.TabIndex = 6; 
 // 
 // Form1 
 // 
 this.AutoScaleDimensions = new System.Drawing.SizeF(11F, 24F); 
 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 
 this.ClientSize = new System.Drawing.Size(572, 384); 
 this.Controls.Add(this.lbl解码信息); 
 this.Controls.Add(this.label2); 
 this.Controls.Add(this.textBox1); 
 this.Controls.Add(this.label1); 
 this.Controls.Add(this.pictureBox1); 
 this.Controls.Add(this.button2); 
 this.Controls.Add(this.button1); 
 this.Font = new System.Drawing.Font("微软雅黑", 10.8F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); 
 this.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5); 
 this.Name = "Form1"; 
 this.Text = "二维码"; 
 ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit(); 
 this.ResumeLayout(false); 
 this.PerformLayout(); 
 
 } 
 
 #endregion 
 
 private System.Windows.Forms.Button button1; 
 private System.Windows.Forms.Button button2; 
 private System.Windows.Forms.PictureBox pictureBox1; 
 private System.Windows.Forms.Label label1; 
 private System.Windows.Forms.TextBox textBox1; 
 private System.Windows.Forms.Label label2; 
 private System.Windows.Forms.Label lbl解码信息; 
 } 
} 

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
 
namespace WinQRCode 
{ 
 using ThoughtWorks.QRCode.Codec; 
 using ThoughtWorks.QRCode.Codec.Data; 
 using ThoughtWorks.QRCode.Codec.Util; 
 using System.IO; 
 using PdfToImage; 
 public partial class Form1 : Form 
 { 
 public Form1() 
 { 
 InitializeComponent(); 
 } 
 /// <summary> 
 /// 编码 
 /// </summary> 
 /// <param name="sender"></param> 
 /// <param name="e"></param> 
 private void button1_Click(object sender, EventArgs e) 
 { 
 if (this.textBox1.Text != "") 
 { 
 Cursor.Current = Cursors.WaitCursor; 
 if (textBox1.Text.Trim() == String.Empty) 
 { 
 MessageBox.Show("不能为空."); 
 return; 
 } 
 QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); 
 qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; 
 qrCodeEncoder.QRCodeScale = 4; 
 qrCodeEncoder.QRCodeVersion = 7; 
 qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; 
 System.Drawing.Image image; 
 String data = textBox1.Text; 
 //编码 
 image = qrCodeEncoder.Encode(data); 
 //图片显示 
 this.pictureBox1.Image = image; 
 Cursor.Current = Cursors.Default; 
 
 } 
 } 
 /// <summary> 
 /// 解码 
 /// </summary> 
 /// <param name="sender"></param> 
 /// <param name="e"></param> 
 private void button2_Click(object sender, EventArgs e) 
 { 
 Cursor.Current = Cursors.WaitCursor; 
 Bitmap b = this.pictureBox1.Image as Bitmap; 
 try 
 { 
 QRCodeDecoder decoder = new QRCodeDecoder(); 
 //解码 
 String decodedString = decoder.decode(new QRCodeBitmapImage(b)); 
 //显示解码信息 
 this.lbl解码信息.Text += decodedString ; 
 } 
 catch (Exception ex) 
 { 
 MessageBox.Show(ex.Message); 
 } 
 Cursor.Current = Cursors.Default; 
 } 
 
 private void Form1_Load(object sender, EventArgs e) 
 { 
 
 } 
 } 
}