首先安装这个Qrcoder，nuget中搜Qrcoder，然后直接点击安装
界面设计
namespace QRCoder { partial class Form1 { ////// 必需的设计器变量。 /// private System.ComponentModel.IContainer components = null; /// /// 清理所有正在使用的资源。 /// /// 如果应释放托管资源，为 true；否则为 false。 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 /// /// 设计器支持所需的方法 - 不要修改 /// 使用代码编辑器修改此方法的内容。 /// 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 = "生成二维码法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 = "二维码包含的数据："; // // 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 = "图标尺寸："; // // 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 = "图标边线："; // // 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 = "白边"; // // 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 = "无"; 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 = "生成二维码法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(); } #endregion private 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; } }
后台代码
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1 private 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操作时间 string strContent = strUrl;// +"/16211580/" + curtime; //Data:/ getapp /< 设备ID >/< UTC时间 > 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"); } ////// 生成二维码 /// /// 内容文本 /// 图片尺寸（像素） /// 图片白边（像素） /// 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; // 核心就是这里新建一个bitmap对象然后将image在这里渲染 Bitmap newBit = new Bitmap(resWidth, resHeight, PixelFormat.Format32bppRgb); Graphics gg = Graphics.FromImage(newBit); // 设置背景白色 for (int y = 0; y < resWidth; y++) { for (int x = 0; x < resHeight; x++) { newBit.SetPixel(x, y, Color.White); } } // 设置黑色边框 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) { } /// /// 法2 /// /// /// 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操作时间 string strContent = strUrl;// +"/16211580/" + curtime; //Data:/ getapp /< 设备ID >/< UTC时间 > create_two(strContent); } } }
如果二维码是用网址生成的，网址正确的情况下，扫描二维码会打开该网址 。