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 = ;
             //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 = ;
             qrCodeEncoder.QRCodeVersion = ;
             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 = ;
             ms.Read(arr, , (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 = ;
             ms.Read(arr, , (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 !=  || img.Width != )
             {
                 img = KiResizeImage(img, , , );
             }
             Graphics g = Graphics.FromImage(imgBack);

             g.DrawImage(imgBack, , , 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 /  - img.Width / , imgBack.Width /  - img.Width / , 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(, , newW, newH), new Rectangle(, , bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                 g.Dispose();
                 return b;
             }
             catch
             {
                 return null;
             }
         }
     }
 }