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  • 本地生成二维码(内容为链接)图片

    通过管理NuGet程序包-----QRCoder.dll安装,添加引用就有QRCoder.dll库文件

    using QRCoder;
    using System;
    using System.Drawing;
    using System.Drawing.Imaging;
    using System.IO;
    
    namespace SYCloud.Framework.Utils.Extension
    {
        public static class QRCoderExtension
        {
            public static MemoryStream GetQRCoder(string content)
            {
                QRCodeGenerator qRCodeGenerator = new QRCodeGenerator();
                //QRCodeData qRCodeData = qRCodeGenerator.CreateQrCode(content, 2, false, false, 0, -1);
      QRCodeData qRCodeData = qRCodeGenerator.CreateQrCode(content,QRCodeGenerator.ECCLevel.L, false, false, 0, -1); QRCode qRCode
    = new QRCode(qRCodeData); Bitmap graphic = qRCode.GetGraphic(5, Color.Black, Color.White, null, 10, 4, true); MemoryStream memoryStream = new MemoryStream(); graphic.Save(memoryStream, ImageFormat.Jpeg); return memoryStream; } } }

    调用如下:

            /// <summary>      
            /// 本地生成二维码图片  
            /// </summary>       
            /// <param name="queryParams"></param> 
            /// <returns></returns>
            public void GetQRCode(NameValueCollection queryParams)
            {
                try
                {
                    string folderPath = System.Web.HttpContext.Current.Server.MapPath("~/weboffice/tempfiles/powerOfAttorneyCode");
                    if (Directory.Exists(folderPath))
                    {
                        Directory.Delete(folderPath, true);
                    }
                    string powerOfAttorneyId = queryParams["PowerOfAttorneyId"];
                    string content = "http://localhost:9999/showORCodeInfo?businessType=EMPOWER&businessKey=" + powerOfAttorneyId;
                    //string content = "http://www.baidu.com";
                    MemoryStream imgStream = QRCoderExtension.GetQRCoder(content);
    
                    Directory.CreateDirectory(folderPath);
    
    //生成固定尺寸二维码100*100 Image image
    = Image.FromStream(imgStream); Image.GetThumbnailImageAbort callb = new Image.GetThumbnailImageAbort(ThumbnailCallback); Image imgs = image.GetThumbnailImage(100, 100, callb, IntPtr.Zero); imgs.Save(System.Web.HttpContext.Current.Server.MapPath("~/weboffice/tempfiles/powerOfAttorneyCode/qrcode.jpg")); } catch (Exception ex) { throw ex; } } public bool ThumbnailCallback() { return false; }
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  • 原文地址:https://www.cnblogs.com/YYkun/p/10862641.html
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