C# 二维码操作类

C# 二维码操作类如下

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Util;
using System.Web;

namespace DotNet.Utilities
{
    public class QRcode
    {
        /// 

        /// 生成二维码图片
        /// 
        /// 字符串
        /// 图片大小
        /// 图片位置 
        /// 例如  /abc/abc/
        /// 
        /// 返回生成的二维码图片路径
        public string Create(string str, int size, string path)
        {
            try
            {
                QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
                //设置编码模式
                qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
                //设置编码测量度
                qrCodeEncoder.QRCodeScale = size;
                //设置编码版本
                qrCodeEncoder.QRCodeVersion = 8;
                //设置编码错误纠正
                qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
                System.Drawing.Image image = qrCodeEncoder.Encode(str);

                string filename = "~" + path + Guid.NewGuid() + ".jpg";
                image.Save(HttpContext.Current.Request.MapPath(filename));

                return filename.Replace("~", "");
            }
            catch (Exception)
            {
                return "";
            }

        }

        /// 
    
        /// 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    
        /// 
    
        /// 粘贴的源图片    
        /// 粘贴的目标图片    
        public static Image CombinImage(Image imgBack, string destImg)
        {
            Image img = Image.FromFile(destImg);        //照片图片      
            if (img.Height != 65 || img.Width != 65)
            {
                img = KiResizeImage(img, 65, 65, 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;
        }

        /// 
    
        /// Resize图片    
        /// 
    
        /// 原始Bitmap    
        /// 新的宽度    
        /// 新的高度    
        /// 保留着，暂时未用    
        /// 处理以后的图片    
        public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)
        {
            try
            {
                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;
            }
        }
    }
}