图片处理

public int UpdateFileImg(HttpRequestBase request, HttpSessionStateBase session, AYBTSubitemDataContext _adc)

        {

            string fileName = ImageClass.GetFileName(request.Files[0].FileName);

            string filePath = ImageClass.GetFilePath(((FunctionModule)(2)).ToString());

            string fileType = ((FunctionModule)(2)).ToString();

            ////////////////////保存原图

            Image picFile = Image.FromStream(request.Files[0].InputStream);

            picFile.Save(filePath + fileName);





            ImageClass ic = new ImageClass(picFile);

            List<PictureView> subItems = new List<PictureView>();

            //获取图片的所有尺寸

            var picTypes = DictionaryManager.GetDictionariesByTypeCode("AdvPictureSize");





            //获取图片尺寸

            var resolutionsA = picTypes.Where(o => o.Key == 1).FirstOrDefault().Value.Split('*');

            var resolutionsB = picTypes.Where(o => o.Key == 2).FirstOrDefault().Value.Split('*');

            var resolutionsC = picTypes.Where(o => o.Key == 3).FirstOrDefault().Value.Split('*');



            //压缩后保存（第一张符合规定的广告大图）

            Image SubPicA = ic.GetReducedImage(int.Parse(resolutionsA[0]), int.Parse(resolutionsA[1]));

            string subFileName = ImageClass.GetFileName(fileName);

            SubPicA.Save(filePath + subFileName, System.Drawing.Imaging.ImageFormat.Jpeg);

            this.SavePic(subItems, SubPicA.Width, SubPicA.Height, picTypes.Where(o => o.Key == 1).FirstOrDefault().Key, subFileName, filePath, fileType, request.Files[0].ContentLength);



            //剪切为广告中图

            string cutImage = ImageClass.CutImage(filePath + subFileName, (int.Parse(resolutionsA[0]) - int.Parse(resolutionsB[0])) / 2, (int.Parse(resolutionsA[1]) - int.Parse(resolutionsB[1])) / 2, int.Parse(resolutionsB[0]), int.Parse(resolutionsB[1]), ImageClass.GetFileName(subFileName), filePath, fileName.Split('.')[1]);

            var nameAndPath = cutImage.Split('*');

            //把中图保存

            this.SavePic(subItems, int.Parse(resolutionsB[0]), int.Parse(resolutionsB[1]), picTypes.Where(o => o.Key == 2).FirstOrDefault().Key, nameAndPath[1], nameAndPath[0], fileType, request.Files[0].ContentLength);



            //压缩广告小图，并保存

            //ic = new ImageClass(Image.FromStream(Image.FromFile(nameAndPath[0]+nameAndPath[1]));

            Image SubPicC = ic.GetReducedImage(int.Parse(resolutionsC[0]), int.Parse(resolutionsC[1]));

            subFileName = ImageClass.GetFileName(nameAndPath[1]);

            SubPicC.Save(filePath + subFileName, System.Drawing.Imaging.ImageFormat.Jpeg);

            this.SavePic(subItems, SubPicC.Width, SubPicC.Height, picTypes.Where(o => o.Key == 3).FirstOrDefault().Key, subFileName, filePath, fileType, request.Files[0].ContentLength);

 

剪裁、压缩

 

 

public static string CutImage(string url, int beginX, int beginY, int getX, int getY, string fileName, string savePath, string fileExt)

        {

            if ((beginX < getX) && (beginY < getY))

            {

                Bitmap bitmap = new Bitmap(url);



                if (((beginX + getX) <= bitmap.Width) && ((beginY + getY) <= bitmap.Height))

                {

                    Bitmap destBitmap = new Bitmap(getX, getY);



                    Rectangle destRect = new Rectangle(0, 0, getX, getY);//容器

                    Rectangle srcRect = new Rectangle(beginX, beginY, getX, getY);



                    Graphics.FromImage(destBitmap).DrawImage(bitmap, destRect, srcRect, GraphicsUnit.Pixel);

                    Graphics g = Graphics.FromImage(bitmap);



                    ImageFormat format = ImageFormat.Png;

                    switch (fileExt.ToLower())

                    {

                        case "png":

                            format = ImageFormat.Png;

                            break;

                        case "bmp":

                            format = ImageFormat.Bmp;

                            break;

                        case "gif":

                            format = ImageFormat.Gif;

                            break;



                    }

                    destBitmap.Save(savePath + "//" + fileName , format);

                    return savePath + "\\" + "*" + fileName.Split('.')[0] + "." + fileExt;

                }

                else

                {

                    return "截取范围超出图片范围";

                }

            }

            else

            {

                return "请确认(beginX < getX)&&(beginY < getY)";

            }



        }