利用QRCoder生成二维码

拼搏现实的明天。 2023-06-05 11:14 5阅读 0赞

1、[项目添加QRCoder.dll 和System.Drawing.dll的引用][QRCoder.dll _System.Drawing.dll]

2、创建二维码公共处理类（QRCoderHelper.cs）

/// <summary>
        /// 二维码公共处理类
        /// </summary>
        public static class QRCoderHelper
        {
            /// <summary>
            /// 创建二维码返回文件路径名称
            /// </summary>
            /// <param name="plainText">二维码内容</param>
            public static string CreateQRCodeToFile(string plainText)
            {
                try
                {
                    string fileName = "";
                    if (String.IsNullOrEmpty(plainText))
                    {
                        return "";
                    }
    
                    //二维码文件目录
                    string filePath = Path.Combine("C:\\","Down\\");
                    if (!Directory.Exists(filePath))
                    {
                        Directory.CreateDirectory(filePath);
                    }
    
                    //创建二维码文件路径名称
                    fileName = filePath + DateTime.Now.ToString("yyyyMMddHHmmss") + new Random().Next(100, 1000) + ".jpeg";
    
                    QRCodeGenerator qrGenerator = new QRCodeGenerator();
                    //QRCodeGenerator.ECCLevel:纠错能力,Q级：约可纠错25%的数据码字
                    QRCodeData qrCodeData = qrGenerator.CreateQrCode(plainText, QRCodeGenerator.ECCLevel.Q);
                    QRCode qrcode = new QRCode(qrCodeData);
                    Bitmap qrCodeImage = qrcode.GetGraphic(15);
                    qrCodeImage.Save(fileName, ImageFormat.Jpeg);
                    return fileName;
                }
                catch (Exception ex)
                {
                    throw new Exception("创建二维码返回文件路径名称方法异常", ex);
                }
            }
    
            /// <summary>
            /// 创建二维码返回byte数组
            /// </summary>
            /// <param name="plainText">二维码内容</param>
            public static byte[] CreateQRCodeToBytes(string plainText)
            {
                try
                {
                    if (String.IsNullOrEmpty(plainText))
                    {
                        return null;
                    }
    
                    QRCodeGenerator qrGenerator = new QRCoder.QRCodeGenerator();
                    //QRCodeGenerator.ECCLevel:纠错能力,Q级：约可纠错25%的数据码字
                    QRCodeData qrCodeData = qrGenerator.CreateQrCode(plainText, QRCodeGenerator.ECCLevel.Q);
                    QRCode qrcode = new QRCode(qrCodeData);
                    Bitmap qrCodeImage = qrcode.GetGraphic(15);
                    MemoryStream ms = new MemoryStream();
                    qrCodeImage.Save(ms, ImageFormat.Jpeg);
                    byte[] arr = new byte[ms.Length];
                    ms.Position = 0;
                    ms.Read(arr, 0, (int)ms.Length);
                    ms.Close();
    
                    return arr;
                }
                catch (Exception ex)
                {
                    throw new Exception("创建二维码返回byte数组方法异常", ex);
                }
            }
    
            /// <summary>
            /// 创建二维码返回Base64字符串
            /// </summary>
            /// <param name="plainText">二维码内容</param>
            public static string CreateQRCodeToBase64(string plainText, bool hasEdify = true)
            {
                try
                {
                    string result = "";
                    if (String.IsNullOrEmpty(plainText))
                    {
                        return "";
                    }
    
                    QRCodeGenerator qrGenerator = new QRCoder.QRCodeGenerator();
                    //QRCodeGenerator.ECCLevel:纠错能力,Q级：约可纠错25%的数据码字
                    QRCodeData qrCodeData = qrGenerator.CreateQrCode(plainText, QRCodeGenerator.ECCLevel.Q);
                    QRCode qrcode = new QRCode(qrCodeData);
                    Bitmap qrCodeImage = qrcode.GetGraphic(15);
                    MemoryStream ms = new MemoryStream();
                    qrCodeImage.Save(ms, ImageFormat.Jpeg);
                    byte[] arr = new byte[ms.Length];
                    ms.Position = 0;
                    ms.Read(arr, 0, (int)ms.Length);
                    ms.Close();
                    if (hasEdify)
                    {
                        result = "data:image/jpeg;base64," + Convert.ToBase64String(arr);
                    }
                    else
                    {
                        result = Convert.ToBase64String(arr);
                    }
                    return result;
                }
                catch (Exception ex)
                {
                    throw new Exception("创建二维码返回Base64字符串方法异常", ex);
                }
            }
        }

调用

//二维码内容
                string plainText = "https://i.cnblogs.com/EditPosts.aspx?opt=1";
    
                //创建二维码返回文件路径名称
                string fileName = QRCoderHelper.CreateQRCodeToFile(plainText);

转载于:https://www.cnblogs.com/macT/p/11395142.html

[QRCoder.dll _System.Drawing.dll]: https://pan.baidu.com/s/1cGVm_ceylYSdETdmpTsUtQ