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
{
/// <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 - 不要修改
/// 使用代码编辑器修改此方法的内容。
/// </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");
}
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="Content">内容文本</param>
/// <param name="size">图片尺寸（像素）</param>
/// <param name="margin">图片白边（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)
{
}
/// <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 。
来源：https://www.cnblogs.com/aijiao/p/10830988.html