C# 使用QRCoder生成二维码

简介

最近瞎琢磨的一些小东西，也算是一个比较完整的二维码生成了，上手也很快，可自行扩展。
现在生成二维码有多种方式，我使用的是QRCoder。

第一步 安装Nuget包 QRCoder

也可以通过命令行来引入，看自己的习惯

第二步 创建一个公共类 QRCoderHelper.cs

这个类用来处理二维码的生成，也方便后续的扩展

using QRCoder;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using static QRCoder.QRCodeGenerator;

namespace QRCoderRWM
{
    /// <summary>
    /// 二维码公共处理类
    /// </summary>
    public static class QRCoderHelper
    {
        ///生成二维码
        /// </summary>
        /// <param name="TextContent">文本信息</param>
        /// <param name="level">容错等级</param>
        /// <param name="version">版本</param>
        /// <param name="pixel">像素点大小</param>
        /// <param name="darkColor">数点颜色</param>
        /// <param name="lightColor">背景颜色</param>
        /// <param name="iconPath">图标路径</param>
        /// <param name="iconSize">图标尺寸</param>
        /// <param name="iconBorder">图标边框厚度</param>
        /// <param name="whiteBorder">二维码白边</param>
        /// <returns></returns>
        public static Bitmap generateQrCode(string TextContent, string level, int version, int pixel,Color darkColor, Color lightColor, string iconPath, int iconSize, int iconBorder, bool whiteBorder)
        {
            QRCodeGenerator.ECCLevel eccLevel = (QRCodeGenerator.ECCLevel)(level == "L" ? 0 : level == "M" ? 1 : level == "Q" ? 2 : 3);
            QRCoder.QRCodeGenerator codeGenerator = new QRCoder.QRCodeGenerator();

            QRCoder.QRCodeData codeData = codeGenerator.CreateQrCode(TextContent, eccLevel, false, false, QRCoder.QRCodeGenerator.EciMode.Utf8, version);

            QRCoder.QRCode code = new QRCoder.QRCode(codeData);

            if (iconPath == "")
            {
                Bitmap bmp = code.GetGraphic(pixel, darkColor, lightColor, whiteBorder);

                return bmp;
            }
            Bitmap icon = new Bitmap(iconPath);

            Bitmap iocnbmp = code.GetGraphic(pixel, darkColor, lightColor, icon, iconSize, iconBorder, whiteBorder);

            return iocnbmp;
        }
    }
}


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第三步 窗体代码

拖拉组件，以及生成的代码

namespace QRCoderRWM
{
    partial class Form2
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.pic = new System.Windows.Forms.PictureBox();
            this.label1 = new System.Windows.Forms.Label();
            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.textcontent = new System.Windows.Forms.TextBox();
            this.versionTxt = new System.Windows.Forms.ComboBox();
            this.iconsizeCom = new System.Windows.Forms.ComboBox();
            this.pixelCom = new System.Windows.Forms.ComboBox();
            this.iconborderCom = new System.Windows.Forms.ComboBox();
            this.whiteborder = new System.Windows.Forms.RadioButton();
            this.whiteborder1 = new System.Windows.Forms.RadioButton();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.levelCom = new System.Windows.Forms.ComboBox();
            this.label6 = new System.Windows.Forms.Label();
            this.label7 = new System.Windows.Forms.Label();
            this.colorDialog1 = new System.Windows.Forms.ColorDialog();
            this.darkColorBtn = new System.Windows.Forms.Button();
            this.lightColorBtn = new System.Windows.Forms.Button();
            this.colorDialog2 = new System.Windows.Forms.ColorDialog();
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
            this.button3 = new System.Windows.Forms.Button();
            this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
            ((System.ComponentModel.ISupportInitialize)(this.pic)).BeginInit();
            this.SuspendLayout();
            // 
            // pic
            // 
            this.pic.Location = new System.Drawing.Point(59, 39);
            this.pic.Name = "pic";
            this.pic.Size = new System.Drawing.Size(590, 400);
            this.pic.TabIndex = 0;
            this.pic.TabStop = false;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(20, 445);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(54, 20);
            this.label1.TabIndex = 1;
            this.label1.Text = "版本：";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(20, 502);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(84, 20);
            this.label2.TabIndex = 2;
            this.label2.Text = "图片尺寸：";
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(20, 613);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(54, 20);
            this.label3.TabIndex = 3;
            this.label3.Text = "白边：";
            // 
            // label4
            // 
            this.label4.AutoSize = true;
            this.label4.Location = new System.Drawing.Point(363, 445);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(54, 20);
            this.label4.TabIndex = 4;
            this.label4.Text = "像素：";
            // 
            // label5
            // 
            this.label5.AutoSize = true;
            this.label5.Location = new System.Drawing.Point(363, 502);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(84, 20);
            this.label5.TabIndex = 5;
            this.label5.Text = "图片边线：";
            // 
            // textcontent
            // 
            this.textcontent.Location = new System.Drawing.Point(20, 671);
            this.textcontent.Multiline = true;
            this.textcontent.Name = "textcontent";
            this.textcontent.Size = new System.Drawing.Size(600, 135);
            this.textcontent.TabIndex = 6;
            this.textcontent.Text = "初秋";
            // 
            // versionTxt
            // 
            this.versionTxt.FormattingEnabled = true;
            this.versionTxt.Items.AddRange(new object[] {
            "-1",
            "0",
            "1",
            "2",
            "3",
            "4",
            "5"});
            this.versionTxt.Location = new System.Drawing.Point(109, 445);
            this.versionTxt.Name = "versionTxt";
            this.versionTxt.Size = new System.Drawing.Size(151, 28);
            this.versionTxt.TabIndex = 7;
            // 
            // iconsizeCom
            // 
            this.iconsizeCom.FormattingEnabled = true;
            this.iconsizeCom.Items.AddRange(new object[] {
            "5",
            "10",
            "15",
            "20",
            "25",
            "30"});
            this.iconsizeCom.Location = new System.Drawing.Point(110, 502);
            this.iconsizeCom.Name = "iconsizeCom";
            this.iconsizeCom.Size = new System.Drawing.Size(151, 28);
            this.iconsizeCom.TabIndex = 8;
            // 
            // pixelCom
            // 
            this.pixelCom.FormattingEnabled = true;
            this.pixelCom.Items.AddRange(new object[] {
            "10",
            "20",
            "30",
            "40",
            "50",
            "60"});
            this.pixelCom.Location = new System.Drawing.Point(469, 445);
            this.pixelCom.Name = "pixelCom";
            this.pixelCom.Size = new System.Drawing.Size(151, 28);
            this.pixelCom.TabIndex = 9;
            // 
            // iconborderCom
            // 
            this.iconborderCom.FormattingEnabled = true;
            this.iconborderCom.Items.AddRange(new object[] {
            "1",
            "2",
            "3",
            "4",
            "5",
            "6",
            "7",
            "8",
            "9"});
            this.iconborderCom.Location = new System.Drawing.Point(469, 502);
            this.iconborderCom.Name = "iconborderCom";
            this.iconborderCom.Size = new System.Drawing.Size(151, 28);
            this.iconborderCom.TabIndex = 10;
            // 
            // whiteborder
            // 
            this.whiteborder.AutoSize = true;
            this.whiteborder.Location = new System.Drawing.Point(109, 613);
            this.whiteborder.Name = "whiteborder";
            this.whiteborder.Size = new System.Drawing.Size(45, 24);
            this.whiteborder.TabIndex = 11;
            this.whiteborder.TabStop = true;
            this.whiteborder.Text = "有";
            this.whiteborder.UseVisualStyleBackColor = true;
            // 
            // whiteborder1
            // 
            this.whiteborder1.AutoSize = true;
            this.whiteborder1.Location = new System.Drawing.Point(215, 613);
            this.whiteborder1.Name = "whiteborder1";
            this.whiteborder1.Size = new System.Drawing.Size(45, 24);
            this.whiteborder1.TabIndex = 12;
            this.whiteborder1.TabStop = true;
            this.whiteborder1.Text = "无";
            this.whiteborder1.UseVisualStyleBackColor = true;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(76, 836);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(94, 29);
            this.button1.TabIndex = 13;
            this.button1.Text = "生成";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(415, 836);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(94, 29);
            this.button2.TabIndex = 14;
            this.button2.Text = "保存";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.button2_Click);
            // 
            // levelCom
            // 
            this.levelCom.FormattingEnabled = true;
            this.levelCom.Items.AddRange(new object[] {
            "L",
            "Q",
            "H",
            "M"});
            this.levelCom.Location = new System.Drawing.Point(109, 554);
            this.levelCom.Name = "levelCom";
            this.levelCom.Size = new System.Drawing.Size(151, 28);
            this.levelCom.TabIndex = 15;
            // 
            // label6
            // 
            this.label6.AutoSize = true;
            this.label6.Location = new System.Drawing.Point(20, 557);
            this.label6.Name = "label6";
            this.label6.Size = new System.Drawing.Size(84, 20);
            this.label6.TabIndex = 16;
            this.label6.Text = "容错等级：";
            // 
            // label7
            // 
            this.label7.AutoSize = true;
            this.label7.Location = new System.Drawing.Point(363, 565);
            this.label7.Name = "label7";
            this.label7.Size = new System.Drawing.Size(0, 20);
            this.label7.TabIndex = 17;
            // 
            // darkColorBtn
            // 
            this.darkColorBtn.Location = new System.Drawing.Point(369, 561);
            this.darkColorBtn.Name = "darkColorBtn";
            this.darkColorBtn.Size = new System.Drawing.Size(94, 29);
            this.darkColorBtn.TabIndex = 21;
            this.darkColorBtn.Text = "二维码颜色";
            this.darkColorBtn.UseVisualStyleBackColor = true;
            this.darkColorBtn.Click += new System.EventHandler(this.darkColorBtn_Click);
            // 
            // lightColorBtn
            // 
            this.lightColorBtn.Location = new System.Drawing.Point(526, 561);
            this.lightColorBtn.Name = "lightColorBtn";
            this.lightColorBtn.Size = new System.Drawing.Size(94, 29);
            this.lightColorBtn.TabIndex = 22;
            this.lightColorBtn.Text = "二维码底色";
            this.lightColorBtn.UseVisualStyleBackColor = true;
            this.lightColorBtn.Click += new System.EventHandler(this.lightColorBtn_Click);
            // 
            // openFileDialog1
            // 
            this.openFileDialog1.FileName = "openFileDialog1";
            // 
            // button3
            // 
            this.button3.Location = new System.Drawing.Point(369, 613);
            this.button3.Name = "button3";
            this.button3.Size = new System.Drawing.Size(94, 29);
            this.button3.TabIndex = 23;
            this.button3.Text = "自定义图片";
            this.button3.UseVisualStyleBackColor = true;
            this.button3.Click += new System.EventHandler(this.button3_Click);
            // 
            // Form2
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.CausesValidation = false;
            this.ClientSize = new System.Drawing.Size(673, 881);
            this.Controls.Add(this.button3);
            this.Controls.Add(this.lightColorBtn);
            this.Controls.Add(this.darkColorBtn);
            this.Controls.Add(this.label7);
            this.Controls.Add(this.label6);
            this.Controls.Add(this.levelCom);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.whiteborder1);
            this.Controls.Add(this.whiteborder);
            this.Controls.Add(this.iconborderCom);
            this.Controls.Add(this.pixelCom);
            this.Controls.Add(this.iconsizeCom);
            this.Controls.Add(this.versionTxt);
            this.Controls.Add(this.textcontent);
            this.Controls.Add(this.label5);
            this.Controls.Add(this.label4);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.pic);
            this.Name = "Form2";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Form2";
            this.Load += new System.EventHandler(this.Form2_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pic)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private PictureBox pic;
        private Label label1;
        private Label label2;
        private Label label3;
        private Label label4;
        private Label label5;
        private TextBox textcontent;
        private ComboBox versionTxt;
        private ComboBox iconsizeCom;
        private ComboBox pixelCom;
        private ComboBox iconborderCom;
        private RadioButton whiteborder;
        private RadioButton whiteborder1;
        private Button button1;
        private Button button2;
        private ComboBox levelCom;
        private Label label6;
        private Label label7;
        private ColorDialog colorDialog1;
        private Button darkColorBtn;
        private Button lightColorBtn;
        private ColorDialog colorDialog2;
        private OpenFileDialog openFileDialog1;
        private Button button3;
        private FolderBrowserDialog folderBrowserDialog1;
    }
}
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第四步 实现方式

处理生成的数据，传给公共类 QRCoderHelper.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static QRCoder.QRCodeGenerator;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;

namespace QRCoderRWM
{
    public partial class Form2 : Form
    {
        //二维码颜色
        private static Color darkColor =Color.Black;
        //背景颜色
        private static Color lightColor = Color.White;
        //Logo地址
        private static string path ="";
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            //版本
            versionTxt.SelectedIndex = 0;
            //像素大小
            pixelCom.SelectedIndex = 0;
            //图片大小
            iconsizeCom.SelectedIndex = 0;
            //图片边框
            iconborderCom.SelectedIndex = 0;
            //容错等级
            levelCom.SelectedIndex = 0;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //版本
            int version = Convert.ToInt16(versionTxt.Text);
            //像素大小
            int pixel = Convert.ToInt16(pixelCom.Text);
            //二维码内容
            string msg = textcontent.Text;
            //图片大小
            int iconSize = Convert.ToInt16(iconsizeCom.Text);
            //图片边框
            int iconBorder = Convert.ToInt16(iconborderCom.Text);
            //二维码空白边框
            bool Iswhiteborder = whiteborder.Checked ? true : false;
            //容错等级
            string level = levelCom.Text;
            Bitmap bitmap = QRCoderHelper.generateQrCode(msg, level, version, pixel, darkColor, lightColor, path, iconSize, iconBorder, Iswhiteborder);
            pic.Image = bitmap;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (pic.Image != null)

                using (SaveFileDialog sfd = new SaveFileDialog())
                {
                    sfd.Filter = "(*.png)|*.png|(*.bmp)|*.bmp";

                    if (sfd.ShowDialog() == DialogResult.OK) pic.Image.Save(sfd.FileName);

                }
        }

        private void darkColorBtn_Click(object sender, EventArgs e)
        {
            //显示颜色对话框
            DialogResult dr = colorDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                darkColor = colorDialog1.Color;
            }
        }

        private void lightColorBtn_Click(object sender, EventArgs e)
        {
            //显示颜色对话框
            DialogResult dr = colorDialog2.ShowDialog();
            if (dr == DialogResult.OK)
            {
                lightColor = colorDialog2.Color;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            var dr = new OpenFileDialog();
            //f.Multiselect = true; //多选
            if (dr.ShowDialog() == DialogResult.OK)
            {
                path = dr.FileName;
                String filename = dr.SafeFileName;
            }
            //选择文件夹
            //FolderBrowserDialog dr = new FolderBrowserDialog();
            //if (dr.ShowDialog() == DialogResult.OK)
            //{
            //    String DirPath = dr.SelectedPath;
            //}
        }
    }
}
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