c# 仿微信二维码生成

    /// <summary>
          /// 生成二维码.
          /// </summary>
          /// <param name="data">需要添加进去的文本</param>
          /// <returns></returns>
          public System.Drawing.Image GCode(String data)
          {
              QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
              qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;  

              qrCodeEncoder.QRCodeScale = 5;
              qrCodeEncoder.QRCodeVersion = 7;  

              qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
              var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8);
              var width = pbImg.Width / 10;
              var dwidth = width * 2;
              Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);
              Graphics g = Graphics.FromImage(bmp);
              var c = System.Drawing.Color.White;
              g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);
              g.DrawImage(pbImg, width, width);
              g.Dispose();
              return bmp;
          }  

          /// <summary>
          /// 调用此函数后使此两种图片合并，类似相册，有个
          /// 背景图，中间贴自己的目标图片
          /// </summary>
          /// <param name="sourceImg">粘贴的源图片</param>
          /// <param name="destImg">粘贴的目标图片</param>
          public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg)
          {  

              System.Drawing.Image img = System.Drawing.Image.FromFile(destImg);        //照片图片
              if (img.Height != 50 || img.Width != 50) {
                  img = KiResizeImage(img, 50, 50, 0);
              }
              Graphics g = Graphics.FromImage(imgBack);  

              g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高);   

              //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框  

              //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);  

              g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2 , img.Width, img.Height);
              GC.Collect();
              return imgBack;
          }  

          /// <summary>
          /// Resize图片
          /// </summary>
          /// <param name="bmp">原始Bitmap</param>
          /// <param name="newW">新的宽度</param>
          /// <param name="newH">新的高度</param>
          /// <param name="Mode">保留着，暂时未用</param>
          /// <returns>处理以后的图片</returns>
          public static System.Drawing.Image KiResizeImage(System.Drawing.Image bmp, int newW, int newH, int Mode)
          {
              try
              {
                  System.Drawing.Image b = new Bitmap(newW, newH);
                  Graphics g = Graphics.FromImage(b);  

                  // 插值算法的质量
                  g.InterpolationMode = InterpolationMode.HighQualityBicubic;  

                  g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                  g.Dispose();  

                  return b;
              }
              catch
              {
                  return null;
              }
          }

调用

CombinImage(GCode(Text), linkpath).Save(SavePath);