Xin chào các bạn, bài viết hôm nay mình hướng dẫn các bạn tạo sử dụng API request đến QRcode monkey để tạo mã qr code với nhiều mẫu mã khác nhau.

[C#] How to create qrcode style in winform

QRCode Monkey là một trong những công cụ trực tuyến hàng đầu và miễn phí để tạo mã QR với chất lượng cao và tính năng tùy chỉnh đa dạng.

Website này cho phép người dùng tạo mã QR cho nhiều mục đích khác nhau như URL, văn bản, email, thông tin liên lạc, vị trí và thậm chí cả thanh toán.

Điểm nổi bật của QRCode Monkey là khả năng tùy biến mạnh mẽ – người dùng có thể điều chỉnh màu sắc, kiểu dáng, logo, và chọn các mẫu độc đáo để làm cho mã QR phù hợp với thương hiệu hoặc phong cách riêng.

Ngoài ra, QRCode Monkey còn hỗ trợ xuất mã QR với độ phân giải cao và các định dạng như PNG, SVG, PDF, và EPS, giúp mã QR của bạn rõ nét trên mọi thiết bị hoặc tài liệu in ấn.

Website cũng bảo mật và không yêu cầu tài khoản, mang lại sự tiện lợi và an tâm cho người dùng khi sử dụng.

Đây là công cụ lý tưởng cho các cá nhân, doanh nghiệp và nhà tiếp thị muốn tối ưu hóa và cá nhân hóa mã QR cho các chiến dịch của mình.

Dưới đây, là hình ảnh demo ứng dụng: (https://www.qrcode-monkey.com/)

Source code C#:

1. Tạo class QRStyle.cs

using System;
using System.Net;
using System.IO;
using System.Text;
using System.Web.Script.Serialization;
using System.Collections.Generic;
using System.Drawing;
using System.Threading.Tasks;


namespace QRCodeStyle
{
    #region Enums
    public static class QRCodePatterns
    {
        public enum Body
        {
            Square,
            Mosaic,
            Dot,
            Circle,
            CircleZebra,
            CircleZebraVertical,
            CircleZebraHorizontal,
            Circular,
            EdgeCut,
            EdgeCutSmooth,
            Japanese,
            Leaf,
            Pointed,
            PointedEdgeCut,
            PointedIn,
            PointedInSmooth,
            PointedSmooth,
            Round,
            RoundedIn,
            RoundedInSmooth,
            RoundedPointed,
            Star,
            Diamond
        }


        public enum Eye
        {
            Frame0,
            Frame1,
            Frame2,
            Frame3,
            Frame4,
            Frame5,
            Frame6,
            Frame7,
            Frame8,
            Frame9,
            Frame10,
            Frame11,
            Frame12,
            Frame13,
            Frame14,
            Frame15,
            Frame16
        }

        public enum Ball
        {
            Ball0,
            Ball1,
            Ball2,
            Ball3,
            Ball4,
            Ball5,
            Ball6,
            Ball7,
            Ball8,
            Ball9,
            Ball10,
            Ball11,
            Ball12,
            Ball13,
            Ball14,
            Ball15,
            Ball16,
            Ball17,
            Ball18
        }

        public enum Gradient
        {
            Linear,
            Radial
        }

        public enum Logo
        {
            Default,
            Clean
        }
    }
    #endregion

    #region Pattern Converters
    public static class PatternConverter
    {
        public static string GetBodyString(QRCodePatterns.Body pattern)
        {
            switch (pattern)
            {
                case QRCodePatterns.Body.Square: return "square";
                case QRCodePatterns.Body.Mosaic: return "mosaic";
                case QRCodePatterns.Body.Dot: return "dot";
                case QRCodePatterns.Body.Circle: return "circle";
                case QRCodePatterns.Body.CircleZebraVertical: return "circle-zebra-vertical";
                case QRCodePatterns.Body.CircleZebraHorizontal: return "circle-zebra-horizontal";
                case QRCodePatterns.Body.Circular: return "circular";
                case QRCodePatterns.Body.EdgeCut: return "edge-cut";
                case QRCodePatterns.Body.EdgeCutSmooth: return "edge-cut-smooth";
                case QRCodePatterns.Body.Japanese: return "japnese";
                case QRCodePatterns.Body.Leaf: return "leaf";
                case QRCodePatterns.Body.Pointed: return "pointed";
                case QRCodePatterns.Body.PointedEdgeCut: return "pointed-edge-cut";
                case QRCodePatterns.Body.PointedIn: return "pointed-in";
                case QRCodePatterns.Body.PointedInSmooth: return "pointed-in-smooth";
                case QRCodePatterns.Body.PointedSmooth: return "pointed-smooth";
                case QRCodePatterns.Body.Round: return "round";
                case QRCodePatterns.Body.RoundedIn: return "rounded-in";
                case QRCodePatterns.Body.RoundedInSmooth: return "rounded-in-smooth";
                case QRCodePatterns.Body.RoundedPointed: return "rounded-pointed";
                case QRCodePatterns.Body.Star: return "star";
                case QRCodePatterns.Body.Diamond: return "diamond";
                default: return "square";
            }

        }

        public static string GetEyeString(QRCodePatterns.Eye eye)
        {
            return "frame" + ((int)eye).ToString();
        }

        public static string GetBallString(QRCodePatterns.Ball ball)
        {
            return "ball" + ((int)ball).ToString();
        }

        public static string GetGradientString(QRCodePatterns.Gradient gradient)
        {
            return gradient.ToString().ToLower();
        }

        public static string GetLogoString(QRCodePatterns.Logo logo)
        {
            return logo.ToString().ToLower();
        }
    }
    #endregion

    #region Configuration Classes
    public class QRConfig
    {
        private QRCodePatterns.Body _bodyPattern;
        private QRCodePatterns.Eye _eyePattern;
        private QRCodePatterns.Ball _ballPattern;
        private QRCodePatterns.Gradient _gradientPattern;
        private QRCodePatterns.Logo _logoPattern;

        private string _body;
        private string _eye;
        private string _eyeBall;
        private string _gradientType;
        private string _logoMode;

        public QRCodePatterns.Body BodyPattern
        {
            get { return _bodyPattern; }
            set
            {
                _bodyPattern = value;
                _body = PatternConverter.GetBodyString(value);
            }
        }

        public QRCodePatterns.Eye EyePattern
        {
            get { return _eyePattern; }
            set
            {
                _eyePattern = value;
                _eye = PatternConverter.GetEyeString(value);
            }
        }

        public QRCodePatterns.Ball BallPattern
        {
            get { return _ballPattern; }
            set
            {
                _ballPattern = value;
                _eyeBall = PatternConverter.GetBallString(value);
            }
        }

        public QRCodePatterns.Gradient GradientPattern
        {
            get { return _gradientPattern; }
            set
            {
                _gradientPattern = value;
                _gradientType = PatternConverter.GetGradientString(value);
            }
        }

        public QRCodePatterns.Logo LogoPattern
        {
            get { return _logoPattern; }
            set
            {
                _logoPattern = value;
                _logoMode = PatternConverter.GetLogoString(value);
            }
        }

        public string body { get { return _body; } }
        public string eye { get { return _eye; } }
        public string eyeBall { get { return _eyeBall; } }
        public string[] erf1 { get; set; }
        public string[] erf2 { get; set; }
        public string[] erf3 { get; set; }
        public string[] brf1 { get; set; }
        public string[] brf2 { get; set; }
        public string[] brf3 { get; set; }
        public string bodyColor { get; set; }
        public string bgColor { get; set; }
        public string eye1Color { get; set; }
        public string eye2Color { get; set; }
        public string eye3Color { get; set; }
        public string eyeBall1Color { get; set; }
        public string eyeBall2Color { get; set; }
        public string eyeBall3Color { get; set; }
        public string gradientColor1 { get; set; }
        public string gradientColor2 { get; set; }
        public string gradientType { get { return _gradientType; } }
        public bool gradientOnEyes { get; set; }
        public string logo { get; set; }
        public string logoMode { get { return _logoMode; } }

        public QRConfig()
        {
            BodyPattern = QRCodePatterns.Body.Square;
            EyePattern = QRCodePatterns.Eye.Frame0;
            BallPattern = QRCodePatterns.Ball.Ball0;
            GradientPattern = QRCodePatterns.Gradient.Linear;
            LogoPattern = QRCodePatterns.Logo.Default;

            erf1 = new string[] { };
            erf2 = new string[] { };
            erf3 = new string[] { };
            brf1 = new string[] { };
            brf2 = new string[] { };
            brf3 = new string[] { };

            bodyColor = "#000000";
            bgColor = "#FFFFFF";
            eye1Color = "#000000";
            eye2Color = "#000000";
            eye3Color = "#000000";
            eyeBall1Color = "#000000";
            eyeBall2Color = "#000000";
            eyeBall3Color = "#000000";
            gradientOnEyes = false;
            logo = "";
        }
    }

    public class QRRequest
    {
        public string data { get; set; }
        public QRConfig config { get; set; }
        public int size { get; set; }
        public string download { get; set; }
        public string file { get; set; }

        public QRRequest()
        {
            size = 1000;
            download = "imageUrl";
            file = "png";
        }
    }
    #endregion

    #region QR Code Generator
    public class QRGenerator
    {
        private const string API_URL = "https://api.qrcode-monkey.com/qr/custom";
        private Dictionary<int, QRConfig> customStyles;

        public QRGenerator()
        {
            customStyles = new Dictionary<int, QRConfig>();
            InitializeDefaultStyles();
        }

        private void InitializeDefaultStyles()
        {
            customStyles[1] = new QRConfig
            {
                BodyPattern = QRCodePatterns.Body.Square,
                EyePattern = QRCodePatterns.Eye.Frame13,
                BallPattern = QRCodePatterns.Ball.Ball14,
                bodyColor = "#000000",
                bgColor = "#FFFFFF",
                eye1Color = "#021326",
                eye2Color = "#021326",
                eye3Color = "#021326",
                eyeBall1Color = "#074f03",
                eyeBall2Color = "#074f03",
                eyeBall3Color = "#074f03",
                gradientColor1 = "#12a637",
                gradientColor2 = "#0b509e",
                GradientPattern = QRCodePatterns.Gradient.Linear,
                gradientOnEyes = true
            };

        }

        public void AddStyle(int styleNumber, QRConfig config)
        {
            if (customStyles.ContainsKey(styleNumber))
            {
                customStyles[styleNumber] = config;
            }
            else
            {
                customStyles.Add(styleNumber, config);
            }
        }

        public class GenerationResult
        {
            public bool Success { get; set; }
            public string Message { get; set; }
            public string ImageUrl { get; set; }
        }

        public GenerationResult Generate(string data, int styleNumber, string savePath)
        {
            try
            {
                QRConfig config = customStyles.ContainsKey(styleNumber)
                    ? customStyles[styleNumber]
                    : customStyles[1];

                var request = new QRRequest
                {
                    data = data,
                    config = config
                };

                var serializer = new JavaScriptSerializer();
                string jsonRequest = serializer.Serialize(request);

                var webRequest = (HttpWebRequest)WebRequest.Create(API_URL);
                webRequest.Method = "POST";
                webRequest.ContentType = "application/json";

                using (var streamWriter = new StreamWriter(webRequest.GetRequestStream()))
                {
                    streamWriter.Write(jsonRequest);
                }

                using (var response = (HttpWebResponse)webRequest.GetResponse())
                using (var reader = new StreamReader(response.GetResponseStream()))
                {
                    string jsonResponse = reader.ReadToEnd();
                    var responseData = serializer.Deserialize<Dictionary<string, object>>(jsonResponse);

                    if (responseData.ContainsKey("imageUrl"))
                    {
                        string imageUrl = "http:" + responseData["imageUrl"].ToString();

                        if (!string.IsNullOrEmpty(savePath))
                        {
                            using (WebClient webClient = new WebClient())
                            {
                                webClient.DownloadFile(imageUrl, savePath);
                            }
                        }

                        return new GenerationResult
                        {
                            Success = true,
                            Message = "Success",
                            ImageUrl = imageUrl
                        };
                    }
                }

                return new GenerationResult
                {
                    Success = false,
                    Message = "Failed to get image URL",
                    ImageUrl = null
                };
            }
            catch (WebException ex)
            {
                using (var stream = ex.Response.GetResponseStream())
                using (var reader = new StreamReader(stream))
                {
                    return new GenerationResult
                    {
                        Success = false,
                        Message = "Error: " + reader.ReadToEnd(),
                        ImageUrl = null
                    };
                }
            }
            catch (Exception ex)
            {
                return new GenerationResult
                {
                    Success = false,
                    Message = "Error: " + ex.Message,
                    ImageUrl = null
                };
            }
        }
        public Image Generate(string data, int styleNumber)
        {
            try
            {
                QRConfig config = customStyles.ContainsKey(styleNumber)
                    ? customStyles[styleNumber]
                    : customStyles[1];

                var request = new QRRequest
                {
                    data = data,
                    config = config
                };

                var serializer = new JavaScriptSerializer();
                string jsonRequest = serializer.Serialize(request);

                var webRequest = (HttpWebRequest)WebRequest.Create(API_URL);
                webRequest.Method = "POST";
                webRequest.ContentType = "application/json";

                using (var streamWriter = new StreamWriter(webRequest.GetRequestStream()))
                {
                    streamWriter.Write(jsonRequest);
                }

                using (var response = (HttpWebResponse)webRequest.GetResponse())
                using (var reader = new StreamReader(response.GetResponseStream()))
                {
                    string jsonResponse = reader.ReadToEnd();
                    var responseData = serializer.Deserialize<Dictionary<string, object>>(jsonResponse);

                    if (responseData.ContainsKey("imageUrl"))
                    {
                        string imageUrl = "http:" + responseData["imageUrl"].ToString();

                        using (WebClient webClient = new WebClient())
                        {
                            byte[] imageData = webClient.DownloadData(imageUrl);

                            using (MemoryStream memoryStream = new MemoryStream(imageData))
                            {
                                return Image.FromStream(memoryStream);
                            }
                        }
                    }
                }

                return null;
            }
            catch (WebException ex)
            {
                using (var stream = ex.Response.GetResponseStream())
                using (var reader = new StreamReader(stream))
                {
                    Console.WriteLine("Error: " + reader.ReadToEnd());
                    return null;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
                return null;
            }
        }

        public async Task<Image> GenerateAsync(string data, int styleNumber)
        {
            try
            {
                QRConfig config = customStyles.ContainsKey(styleNumber)
                    ? customStyles[styleNumber]
                    : customStyles[1];

                var request = new QRRequest
                {
                    data = data,
                    config = config
                };

                var serializer = new JavaScriptSerializer();
                string jsonRequest = serializer.Serialize(request);

                var webRequest = (HttpWebRequest)WebRequest.Create(API_URL);
                webRequest.Method = "POST";
                webRequest.ContentType = "application/json";

                using (var requestStream = await Task.Factory.FromAsync(
                    webRequest.BeginGetRequestStream, webRequest.EndGetRequestStream, null))
                using (var streamWriter = new StreamWriter(requestStream))
                {
                    await streamWriter.WriteAsync(jsonRequest);
                }

                using (var response = (HttpWebResponse)await Task.Factory.FromAsync(
                    webRequest.BeginGetResponse, webRequest.EndGetResponse, null))
                using (var reader = new StreamReader(response.GetResponseStream()))
                {
                    string jsonResponse = await reader.ReadToEndAsync();
                    var responseData = serializer.Deserialize<Dictionary<string, object>>(jsonResponse);

                    if (responseData.ContainsKey("imageUrl"))
                    {
                        string imageUrl = "http:" + responseData["imageUrl"].ToString();

                        using (WebClient webClient = new WebClient())
                        {
                            byte[] imageData = await webClient.DownloadDataTaskAsync(imageUrl);

                            using (MemoryStream memoryStream = new MemoryStream(imageData))
                            {
                                return Image.FromStream(memoryStream);
                            }
                        }
                    }
                }

                return null;
            }
            catch (WebException ex)
            {
                using (var stream = ex.Response.GetResponseStream())
                using (var reader = new StreamReader(stream))
                {
                    Console.WriteLine("Error: " + await reader.ReadToEndAsync());
                    return null;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
                return null;
            }
        }

        public string UploadImage(string imagePath)
        {
            string url = "https://api.qrcode-monkey.com//qr/uploadimage";
            string boundary = "------------------------" + DateTime.Now.Ticks.ToString("x");

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "multipart/form-data; boundary=" + boundary;

            using (Stream requestStream = request.GetRequestStream())
            {
                byte[] boundaryBytes = System.Text.Encoding.ASCII.GetBytes("--" + boundary + "
");
                requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);

                byte[] headerBytes = System.Text.Encoding.UTF8.GetBytes(
                    "Content-Disposition: form-data; name="file"; filename="" + Path.GetFileName(imagePath) + ""
" +
                    "Content-Type: application/octet-stream

");
                requestStream.Write(headerBytes, 0, headerBytes.Length);

                using (FileStream fileStream = new FileStream(imagePath, FileMode.Open, FileAccess.Read))
                {
                    fileStream.CopyTo(requestStream);
                }

                byte[] trailerBytes = System.Text.Encoding.ASCII.GetBytes("
--" + boundary + "--
");
                requestStream.Write(trailerBytes, 0, trailerBytes.Length);
            }

            try
            {
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                using (StreamReader reader = new StreamReader(response.GetResponseStream()))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (WebException ex)
            {
                using (StreamReader reader = new StreamReader(ex.Response.GetResponseStream()))
                {
                    return "Error: " + reader.ReadToEnd();
                }
            }
        }
    }
}
#endregion

2. Source code sử dụng trên Form1.cs

using QRCodeStyle;
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;

namespace TestMultiQR
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            LoadInit();
        }
        private void PopulateComboBox<T>(ComboBox comboBox)
        {
            comboBox.Items.Clear();
            foreach (var pattern in Enum.GetValues(typeof(T)))
            {
                comboBox.Items.Add(pattern.ToString());
            }

            comboBox.SelectedIndex = 0;
        }

        private T GetSelectedEnum<T>(ComboBox comboBox) where T : Enum
        {
            if (comboBox.SelectedItem != null)
            {
                return (T)Enum.Parse(typeof(T), comboBox.SelectedItem.ToString());
            }
            throw new InvalidOperationException("No item selected in the ComboBox.");
        }

        private void LoadInit()
        {
            PopulateComboBox<QRCodePatterns.Body>(cb_bodyShape);
            PopulateComboBox<QRCodePatterns.Eye>(cb_eyeFrame);
            PopulateComboBox<QRCodePatterns.Ball>(cb_eyeBall);
        }

        private void btnColor1_Click(object sender, EventArgs e)
        {
            var color1 = btnColor1.BackColor;
            colorDialog1.Color = color1;
            var dlg = colorDialog1.ShowDialog();

            if (dlg == DialogResult.OK)
            {
                btnColor1.BackColor = colorDialog1.Color;
                var htmlText = ColorTranslator.ToHtml(btnColor1.BackColor);
                btnColor1.Text = htmlText;
            }

        }

        private void btnColor2_Click(object sender, EventArgs e)
        {
            var color2 = btnColor2.BackColor;
            colorDialog1.Color = color2;
            var dlg = colorDialog1.ShowDialog();

            if (dlg == DialogResult.OK)
            {
                btnColor2.BackColor = colorDialog1.Color;
                var htmlText = ColorTranslator.ToHtml(btnColor2.BackColor);
                btnColor2.Text = htmlText;
            }
        }

        private async void button1_Click(object sender, EventArgs e)
        {
            var body = GetSelectedEnum<QRCodePatterns.Body>(cb_bodyShape);
            var frame = GetSelectedEnum<QRCodePatterns.Eye>(cb_eyeFrame);
            var ball = GetSelectedEnum<QRCodePatterns.Ball>(cb_eyeBall);

            var color1 = ColorTranslator.ToHtml(btnColor1.BackColor);
            var color2 = ColorTranslator.ToHtml(btnColor2.BackColor);

            var generator = new QRGenerator();


            var customConfig = new QRConfig
            {
                BodyPattern = body,
                EyePattern = frame,
                BallPattern = ball,
                GradientPattern = QRCodePatterns.Gradient.Linear,
                bodyColor = "#FF0000",
                bgColor = "#FFFFFF",
                gradientColor1 = color1,
                gradientColor2 = color2,
                gradientOnEyes = true,
                LogoPattern = QRCodePatterns.Logo.Clean,
                logo = logoFile
            };

            // Add custom style
            generator.AddStyle(2, customConfig);
            var text = txtText.Text;
            var image = await generator.GenerateAsync(text, 2);
            picResult.Image = image;
        }
        public string logoFile;
        private void button2_Click(object sender, EventArgs e)
        {
            var dlg = new OpenFileDialog();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                var path = dlg.FileName;
                var generator = new QRGenerator();
                var jsonData = generator.UploadImage(path);
                logoFile = JsonConvert.DeserializeObject<LogoURL>(jsonData).file;
                piclogo.LoadAsync(path);
                MessageBox.Show(logoFile);
            }
        }

        public class LogoURL
        {
            public string file { get; set; }
        }
    }
}
erator();
                var jsonData = generator.UploadImage(path);
                logoFile = JsonConvert.DeserializeObject<LogoURL>(jsonData).file;
                piclogo.LoadAsync(path);
                MessageBox.Show(logoFile);
            }
        }

        public class LogoURL
        {
            public string file { get; set; }
        }
    }
}

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