首先安裝這個Qrcoder，nuget中搜Qrcoder，然后直接點擊安裝

界面設計

namespace QRCoder {partial class Form1{/// <summary>/// 必需的設計器變量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary>/// 清理所有正在使用的資源。/// </summary>/// <param name="disposing">如果應釋放托管資源，為 true；否則為 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗體設計器生成的代碼/// <summary>/// 設計器支持所需的方法 - 不要修改/// 使用代碼編輯器修改此方法的內容。/// </summary>private void InitializeComponent(){this.pb_qrcode = new System.Windows.Forms.PictureBox();this.button1 = new System.Windows.Forms.Button();this.label1 = new System.Windows.Forms.Label();this.tb_msg = new System.Windows.Forms.TextBox();this.cb_version = new System.Windows.Forms.ComboBox();this.cb_icon_border = new System.Windows.Forms.ComboBox();this.cb_pixel = new System.Windows.Forms.ComboBox();this.cb_icon_size = new System.Windows.Forms.ComboBox();this.label2 = new System.Windows.Forms.Label();this.label3 = new System.Windows.Forms.Label();this.label4 = new System.Windows.Forms.Label();this.label5 = new System.Windows.Forms.Label();this.label6 = new System.Windows.Forms.Label();this.rb_we_y = new System.Windows.Forms.RadioButton();this.radioButton2 = new System.Windows.Forms.RadioButton();this.button2 = new System.Windows.Forms.Button();((System.ComponentModel.ISupportInitialize)(this.pb_qrcode)).BeginInit();this.SuspendLayout();// // pb_qrcode// this.pb_qrcode.Location = new System.Drawing.Point(418, 12);this.pb_qrcode.Name = "pb_qrcode";this.pb_qrcode.Size = new System.Drawing.Size(359, 291);this.pb_qrcode.TabIndex = 0;this.pb_qrcode.TabStop = false;// // button1// this.button1.Location = new System.Drawing.Point(85, 443);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(139, 32);this.button1.TabIndex = 1;this.button1.Text = "生成二維碼法1";this.button1.UseVisualStyleBackColor = true;this.button1.Click += new System.EventHandler(this.button1_Click);// // label1// this.label1.AutoSize = true;this.label1.Location = new System.Drawing.Point(31, 400);this.label1.Name = "label1";this.label1.Size = new System.Drawing.Size(113, 12);this.label1.TabIndex = 2;this.label1.Text = "二維碼包含的數據：";// // tb_msg// this.tb_msg.Location = new System.Drawing.Point(151, 400);this.tb_msg.Name = "tb_msg";this.tb_msg.Size = new System.Drawing.Size(695, 21);this.tb_msg.TabIndex = 3;// // cb_version// this.cb_version.FormattingEnabled = true;this.cb_version.Items.AddRange(new object[] {"15","16","3","2","1","0"});this.cb_version.Location = new System.Drawing.Point(85, 27);this.cb_version.Name = "cb_version";this.cb_version.Size = new System.Drawing.Size(121, 20);this.cb_version.TabIndex = 4;this.cb_version.Text = "5";// // cb_icon_border// this.cb_icon_border.FormattingEnabled = true;this.cb_icon_border.Items.AddRange(new object[] {"5","4","3","2","1"});this.cb_icon_border.Location = new System.Drawing.Point(280, 95);this.cb_icon_border.Name = "cb_icon_border";this.cb_icon_border.Size = new System.Drawing.Size(121, 20);this.cb_icon_border.TabIndex = 5;this.cb_icon_border.Text = "5";// // cb_pixel// this.cb_pixel.DisplayMember = "7";this.cb_pixel.FormattingEnabled = true;this.cb_pixel.Items.AddRange(new object[] {"7","6","5","4","3"});this.cb_pixel.Location = new System.Drawing.Point(280, 27);this.cb_pixel.Name = "cb_pixel";this.cb_pixel.Size = new System.Drawing.Size(121, 20);this.cb_pixel.TabIndex = 6;this.cb_pixel.Text = "7";this.cb_pixel.ValueMember = "7";// // cb_icon_size// this.cb_icon_size.FormattingEnabled = true;this.cb_icon_size.Items.AddRange(new object[] {"20","19","18","17","16"});this.cb_icon_size.Location = new System.Drawing.Point(87, 95);this.cb_icon_size.Name = "cb_icon_size";this.cb_icon_size.Size = new System.Drawing.Size(121, 20);this.cb_icon_size.TabIndex = 7;this.cb_icon_size.Text = "20";// // label2// this.label2.AutoSize = true;this.label2.Location = new System.Drawing.Point(13, 34);this.label2.Name = "label2";this.label2.Size = new System.Drawing.Size(41, 12);this.label2.TabIndex = 8;this.label2.Text = "版本：";// // label3// this.label3.AutoSize = true;this.label3.Location = new System.Drawing.Point(13, 103);this.label3.Name = "label3";this.label3.Size = new System.Drawing.Size(65, 12);this.label3.TabIndex = 9;this.label3.Text = "圖標尺寸：";// // label4// this.label4.AutoSize = true;this.label4.Location = new System.Drawing.Point(212, 27);this.label4.Name = "label4";this.label4.Size = new System.Drawing.Size(29, 12);this.label4.TabIndex = 10;this.label4.Text = "像素";// // label5// this.label5.AutoSize = true;this.label5.Location = new System.Drawing.Point(214, 95);this.label5.Name = "label5";this.label5.Size = new System.Drawing.Size(65, 12);this.label5.TabIndex = 11;this.label5.Text = "圖標邊線：";// // label6// this.label6.AutoSize = true;this.label6.Location = new System.Drawing.Point(15, 163);this.label6.Name = "label6";this.label6.Size = new System.Drawing.Size(29, 12);this.label6.TabIndex = 12;this.label6.Text = "白邊";// // rb_we_y// this.rb_we_y.AutoSize = true;this.rb_we_y.Location = new System.Drawing.Point(87, 163);this.rb_we_y.Name = "rb_we_y";this.rb_we_y.Size = new System.Drawing.Size(35, 16);this.rb_we_y.TabIndex = 13;this.rb_we_y.TabStop = true;this.rb_we_y.Text = "有";this.rb_we_y.UseVisualStyleBackColor = true;// // radioButton2// this.radioButton2.AutoSize = true;this.radioButton2.Location = new System.Drawing.Point(151, 163);this.radioButton2.Name = "radioButton2";this.radioButton2.Size = new System.Drawing.Size(35, 16);this.radioButton2.TabIndex = 14;this.radioButton2.TabStop = true;this.radioButton2.Text = "無";this.radioButton2.UseVisualStyleBackColor = true;// // button2// this.button2.Location = new System.Drawing.Point(262, 443);this.button2.Name = "button2";this.button2.Size = new System.Drawing.Size(139, 32);this.button2.TabIndex = 15;this.button2.Text = "生成二維碼法2";this.button2.UseVisualStyleBackColor = true;this.button2.Click += new System.EventHandler(this.button2_Click);// // Form1// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(885, 579);this.Controls.Add(this.button2);this.Controls.Add(this.radioButton2);this.Controls.Add(this.rb_we_y);this.Controls.Add(this.label6);this.Controls.Add(this.label5);this.Controls.Add(this.label4);this.Controls.Add(this.label3);this.Controls.Add(this.label2);this.Controls.Add(this.cb_icon_size);this.Controls.Add(this.cb_pixel);this.Controls.Add(this.cb_icon_border);this.Controls.Add(this.cb_version);this.Controls.Add(this.tb_msg);this.Controls.Add(this.label1);this.Controls.Add(this.button1);this.Controls.Add(this.pb_qrcode);this.Name = "Form1";this.Text = "Form1";this.Load += new System.EventHandler(this.Form1_Load);((System.ComponentModel.ISupportInitialize)(this.pb_qrcode)).EndInit();this.ResumeLayout(false);this.PerformLayout();}#endregionprivate System.Windows.Forms.PictureBox pb_qrcode;private System.Windows.Forms.Button button1;private System.Windows.Forms.Label label1;private System.Windows.Forms.TextBox tb_msg;private System.Windows.Forms.ComboBox cb_version;private System.Windows.Forms.ComboBox cb_icon_border;private System.Windows.Forms.ComboBox cb_pixel;private System.Windows.Forms.ComboBox cb_icon_size;private System.Windows.Forms.Label label2;private System.Windows.Forms.Label label3;private System.Windows.Forms.Label label4;private System.Windows.Forms.Label label5;private System.Windows.Forms.Label label6;private System.Windows.Forms.RadioButton rb_we_y;private System.Windows.Forms.RadioButton radioButton2;private System.Windows.Forms.Button button2;} }

后臺代碼

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Linq; using System.Text; using System.Windows.Forms; using ThoughtWorks.QRCode.Codec;namespace QRCoder {public partial class Form1 : Form{public Form1(){InitializeComponent();}//法1private void button1_Click(object sender, EventArgs e){//Image image;//try//{// QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();// qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;// qrCodeEncoder.QRCodeScale = Convert.ToInt32(cb_icon_size.Text);//尺寸// qrCodeEncoder.QRCodeVersion = Convert.ToInt32(cb_version.Text);//版本// qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;// image = qrCodeEncoder.Encode(tb_msg.Text);//}//catch (Exception ex)//{// image = null;//}//if (image != null)//{// pb_qrcode.Image = image;//}//create_two(this.tb_msg.Text);string strUrl = "https://www.baidu.com/";// "https://eco.blockchainlock.io/keyvox";System.DateTime currentTime = new System.DateTime();currentTime = System.DateTime.Now;string curtime = currentTime.ToString("yyyy-MM-dd");//zhj-2019-05-08操作時間 string strContent = strUrl;// +"/16211580/" + curtime; //Data:/ getapp /< 設備ID >/< UTC時間 >try{Bitmap bt = CreateQRCode(strContent, 291, 5);bt.Save(".\\image.Png", System.Drawing.Imaging.ImageFormat.Png);pb_qrcode.Image = Image.FromFile(@".\\image.Png");}catch (Exception ex){MessageBox.Show(ex.Message);}//System.Web.HttpUtility.UrlEncode(strContent, System.Text.Encoding.Unicode);//create_two(strContent);//int version = Convert.ToInt16(cb_version.Text);//int pixel = Convert.ToInt16(cb_pixel.Text);//string str_msg = tb_msg.Text;//int int_icon_size = Convert.ToInt16(cb_icon_size.Text);//int int_icon_border = Convert.ToInt16(cb_icon_border.Text);//bool b_we = rb_we_y.Checked ? true : false;//Bitmap bmp = QRCoder.Encoder.code(str_msg, version, pixel, "E:/seaconch/git/1.jpg", int_icon_size, int_icon_border, b_we);//pb_qrcode.Image = bmp; }private void create_two(string nr){Bitmap bt;string enCodeString = nr;QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);//string filename = string.Format(DateTime.Now.ToString(), "yyyymmddhhmmss")//+ ".jpg";//filename = filename.Replace(" ", "");//filename = filename.Replace(":", "");//filename = filename.Replace("-", "");//filename = filename.Replace(".", "");bt.Save(".\\image.Png", System.Drawing.Imaging.ImageFormat.Png);pb_qrcode.Image = Image.FromFile(@".\\image.Png");}/// <summary>/// 生成二維碼/// </summary>/// <param name="Content">內容文本</param>/// <param name="size">圖片尺寸（像素）</param>/// <param name="margin">圖片白邊（像素）</param>/// <returns></returns>public static Bitmap CreateQRCode(string Content, int size, int margin = 5){QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;qrCodeEncoder.QRCodeScale = 10;qrCodeEncoder.QRCodeVersion = 6;qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;try{System.Drawing.Image image = qrCodeEncoder.Encode(Content);int resWidth = size + 2 * margin;int resHeight = size + 2 * margin;// 核心就是這里新建一個bitmap對象然后將image在這里渲染Bitmap newBit = new Bitmap(resWidth, resHeight, PixelFormat.Format32bppRgb);Graphics gg = Graphics.FromImage(newBit);// 設置背景白色for (int y = 0; y < resWidth; y++){for (int x = 0; x < resHeight; x++){newBit.SetPixel(x, y, Color.White);}}// 設置黑色邊框for (int i = 0; i < resWidth; i++){newBit.SetPixel(i, 0, Color.Black);newBit.SetPixel(i, resWidth - 1, Color.Black);}for (int j = 0; j < resHeight; j++){newBit.SetPixel(0, j, Color.Black);newBit.SetPixel(resHeight - 1, j, Color.Black);}gg.DrawImage(image, margin, margin, size, size);//newBit.Save(size.ToString() + ".png");return newBit;}catch (Exception){return null;}}private void Form1_Load(object sender, EventArgs e){}/// <summary>/// 法2/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button2_Click(object sender, EventArgs e){string strUrl = "https://www.baidu.com/";// "https://eco.blockchainlock.io/keyvox";System.DateTime currentTime = new System.DateTime();currentTime = System.DateTime.Now;string curtime = currentTime.ToString("yyyy-MM-dd");//zhj-2019-05-08操作時間 string strContent = strUrl;// +"/16211580/" + curtime; //Data:/ getapp /< 設備ID >/< UTC時間 > create_two(strContent);}}}

如果二維碼是用網址生成的，網址正確的情況下，掃描二維碼會打開該網址 。

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轉載于:https://www.cnblogs.com/aijiao/p/10830988.html

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