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;  
              }  
          }  

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