C # picture Compression upload

   <summary>///Compressed picture///</summary>//<param name= "ISource" > Picture file &LT;/PARAM&G        T <param name= "Outpath" > Path </param> such as var Outpath = Path.Combine (Request.mappath ("~/upload"), Path.getfilename (file.        FileName));        <param name= "Flag" > the larger the value, the better the picture quality, the general default control at 50 for best compression quality </param>//<returns></returns> public static bool Reduceimage (Image ISource, string outpath, int flag) {ImageFormat Tformat = ISource.            Rawformat;            EncoderParameters EP = new EncoderParameters ();            long[] qy = new Long[1];            QY[0] = flag;            Encoderparameter Eparam = new Encoderparameter (System.Drawing.Imaging.Encoder.Quality, QY); Ep.            Param[0] = Eparam;                try {imagecodecinfo[] Arrayici = Imagecodecinfo.getimagedecoders ();                ImageCodecInfo jpegiciinfo = null; for (int x = 0; x < arrayici.lengtH X + +) {if (arrayici[x].                        Formatdescription.equals ("JPEG")) {jpegiciinfo = arrayici[x];                    Break                }} if (Jpegiciinfo! = null) Isource.save (Outpath, Jpegiciinfo, EP);                else Isource.save (Outpath, Tformat);            return true;            } catch {return false;            } finally {isource.dispose (); }        }

Picture type conversion

<summary>        ///byte[] Picture conversion///        </summary>/        <param name= "Buffer" ></param>        //<returns></returns> public static Image bytestoimage (byte[] buffer)        {            MemoryStream ms = new MemoryStream (buffer);            Image image = System.Drawing.Image.FromStream (ms);            return image;        

　　

  <summary>////Use stream mode to upload and save files///</summary>//<param name= "s" > File stream </param&        Gt <param name= "Savepath" > Save file path </param>//<param name= "Warning" > Process warning message, if empty, the processing succeeds </param&gt        ; <returns> return file Save full path </returns> public static string Uploadbystream (Stream s, String savepathfolder,                Out string warning) {try {int is = 0;                    if (s.length > 0) {MemoryStream ms = new MemoryStream (); while (is = S.readbyte ())! =-1) {Ms.                    WriteByte ((byte) be); } string reletivefolder = "uploadfile\\manageimage\\" + savepathfolder + "\ \" + DateTime.Now.Year + "\ \                    "+ DateTime.Now.Month;                    String folderpath = HttpContext.Current.Server.MapPath ("~/") + Reletivefolder; if (! Directory.exIsts (FolderPath)) directory.createdirectory (FolderPath);                    string filename = DateTime.Now.ToString ("YYYYMMDDHHMMSS") + ". jpg";                    String NewPath = FolderPath + "\ \" + filename;                    String lastpath = "";                    Lastpath = NewPath;                    Fileexistmappath (NewPath, FILECHECKMODEL.M, out Lastpath);                    FileStream fs = new FileStream (Lastpath, FileMode.Create); Ms.                    WriteTo (FS); Release Ms.                    Dispose (); Fs.                    Dispose ();                    Warning = "";                return reletivefolder + "\ \" + filename;                } warning = "error";            Return ""; } catch (Exception ex) {warning = "error" + ex.                Message;            Return ""; }        }

　　

C # picture Compression upload