QRCodeHelper 二维码生成

QRCodeHelper 二维码生成

using System;
using System.Drawing;
using ThoughtWorks.QRCode.Codec;
using System.IO;
using System.Text;
using System.Drawing.Drawing2D;
using System.Web;

namespace APP.QrCodes
{
    public class QRCodeHelper
    {
        public enum ImgEnum
        {
            JPG
        }

        public static string GetImgType(ImgEnum jpg)
        {
            string ext = string.Empty;
            switch (jpg)
            {
                case ImgEnum.JPG:
                    ext = ".jpg";
                    break;
                default:
                    break;
            }
            return ext;
        }
        /// <summary>  
        /// 生成二维码图片  
        /// </summary>  
        /// <param name="codeNumber">要生成二维码的字符串</param>       
        /// <param name="size">大小尺寸</param>  
        /// <returns>二维码图片</returns>  
        public Bitmap Create_ImgCode(string codeNumber, int size)
        {
            //创建二维码生成类  
            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 = 0;
            //设置编码错误纠正  
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            //生成二维码图片  
            System.Drawing.Bitmap image = qrCodeEncoder.Encode(codeNumber, Encoding.UTF8);
             
            return image;
        }

        public static string CreateLogQrCode(string strContent)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeScale = 5;
            qrCodeEncoder.QRCodeVersion = 8;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            System.Drawing.Image image = qrCodeEncoder.Encode(strContent, Encoding.UTF8);//生成二维码图片  

            System.IO.MemoryStream MStream = new System.IO.MemoryStream();
            image.Save(MStream,System.Drawing.Imaging.ImageFormat.Png);

            System.IO.MemoryStream MStream1 = new System.IO.MemoryStream();
            CombinImage(image, HttpRuntime.AppDomainAppPath + "QrCodes/logo.png").Save(MStream1, System.Drawing.Imaging.ImageFormat.Png);

            string reStr = Convert.ToBase64String(MStream1.ToArray());
            //image.Dispose();  
            MStream.Dispose();
            MStream1.Dispose();
            return reStr;
        }

        public string SaveImg(Bitmap bmp, string path)
        { 
            bmp.Save(path);
            return path;
        }

        /// <summary>
        /// 保存图片
        /// </summary>
        /// <param name="bmp">源</param>
        /// <param name="path">路径</param>
        /// <param name="jpg">格式</param>
        /// <returns></returns>
        public bool SaveImg(Bitmap bmp, string path,ImgEnum jpg)
        {
            try
            {
                bmp.Save(path);
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 保存图片
        /// </summary>
        /// <param name="bmp">源</param>
        /// <param name="path">路径</param>
        /// <param name="path">文件名</param>
        /// <returns></returns>
        public bool SaveImg(Bitmap bmp, string path,string fileName)
        {
            try
            {
                bmp.Save(path+fileName);
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 保存图片
        /// </summary>
        /// <param name="bmp">源</param>
        /// <param name="path">路径</param>
        /// <param name="path">文件名</param>
        /// <param name="jpg">格式</param>
        /// <returns></returns>
        public bool SaveImg(Bitmap bmp, string path, string fileName,ImgEnum jpg)
        {
            try
            {
                var ext = GetImgType(jpg);
                bmp.Save(path + fileName + ext);
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// Bitmap转化base64编码
        /// </summary>
        /// <param name="bmp"></param>
        /// <returns></returns>
        public string GetBase64String(Bitmap bmp)
        {
            MemoryStream ms = new MemoryStream();
            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] arr = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(arr, 0, (int)ms.Length);
            ms.Close();
            string pic = Convert.ToBase64String(arr);
            return pic;
        }

        /// <summary>
        /// 得到流
        /// </summary>
        /// <param name="bmp"></param>
        /// <returns></returns>
        public Stream GetStream(Bitmap bmp)
        {
            MemoryStream ms = new MemoryStream();
            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] arr = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(arr, 0, (int)ms.Length);
            ms.Close();
            return ms;
        }


        /// <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="imgBack">粘贴的源图片</param>    
        /// <param name="destImg">粘贴的目标图片</param>    
        /// <summary>   
        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;
        }  
  
        /// <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 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;
            }
        }  
    }
}