图片质量压缩

最新推荐文章于 2023-08-11 23:58:34 发布

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最新推荐文章于 2023-08-11 23:58:34 发布

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转：http://www.cnblogs.com/lifeil/archive/2013/02/25/2931683.html

public static bool GetPicThumbnail(string sFile, string outPath, int flag)
        {
            System.Drawing.Image iSource = System.Drawing.Image.FromFile(sFile);
            ImageFormat tFormat = iSource.RawFormat;

            //以下代码为保存图片时，设置压缩质量  
            EncoderParameters ep = new EncoderParameters();
            long[] qy = new long[1];
            qy[0] = flag;//设置压缩的比例1-100  
            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
            ep.Param[0] = eParam;
            try
            {
                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
                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);//dFile是压缩后的新路径  
                }
                else
                {
                    iSource.Save(outPath, tFormat);
                }
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                iSource.Dispose();
                iSource.Dispose();
            }
        }

下面是一个服务器上图片自动压缩工具。

 private void button1_Click(object sender, EventArgs e)
        {
            if (isStart)
            {
                MessageBox.Show("已经开启！");
                return;
            }
            isStart = true;
            Thread thread = new Thread(new ParameterizedThreadStart(jj));
            thread.Start(cbDisk.Text);
        }

public void jj(object disk)
        {
            while (true)
            {
                Thread.Sleep(10000);
                //获取检测盘符
                //获取当天的时间，做个延迟十分钟切换压缩目录
                string date = string.Format("{0:yyyyMMdd}", DateTime.Now.AddMinutes(-10));
                //当天的目录
                string datePath = disk + @"\" + date;
                //获取目录下面的所有图片文件
                string[] pictures = DirFile.GetFileNames(datePath, "*.JPG", true);
                foreach (var path in pictures)
                {
                    FileInfo fileInfo = new FileInfo(path);
                    long size = fileInfo.Length;
                    if (size / 1024 > 400)//大于400K就进行压缩
                    {
                        string fileName = fileInfo.Name;
                        try
                        {
                            GetPicThumbnail(path, datePath + @"\" + fileName, 10);
                            //删除原始图片
                            File.Delete(path);
                            //移动
                            File.Move(datePath + @"\" + fileName, path);
                        }
                        catch { }
                    }
                }
            }
        }