public FileEntity UploadImageThumbnailByWidth (HttpPostedFile fileData, string fileFolder, string physicalpath, int width, int height, string prefix = "") { ThumnailMode mode = ThumnailMode.EqualW; string fileType = "jpg"; FileEntity file = new FileEntity(); if (fileData != null) { try { string filePath = physicalpath + "/"; if (!Directory.Exists(filePath)) { Directory.CreateDirectory(filePath); } file.DisplayName = Path.GetFileName(fileData.FileName); file.Extension = Path.GetExtension(file.DisplayName); file.Size = fileData.ContentLength; file.ContentType = fileData.ContentType; file.CreateTime = DateTime.Now; file.DbName = GetFileDBName(file.Extension); file.FilePath = "/" + fileFolder + "/" + file.DbName; Image image = Image.FromStream(fileData.InputStream); int outWidth = 0; int outHeight = 0; ThumbnailHelper.CreateOutWAndH(image, filePath + file.DbName, width, height, mode, fileType, out outWidth, out outHeight); file.ImageWidth = outWidth; file.ImageHeight = outHeight; return(file); } catch (Exception ex) { WebLogAgent.Write(ex); return(null); } } else { return(null); } }
public static void Create(Image originalImage, string outputFileName, int width, int height, ThumnailMode mode, string fileType) { Image bitmap = null; Graphics g = null; int towidth = width; int toheight = height; int x = 0; int y = 0; int ow = originalImage.Width; int oh = originalImage.Height; switch (mode) { case ThumnailMode.EqualW: toheight = originalImage.Height * width / originalImage.Width; break; case ThumnailMode.HW: break; case ThumnailMode.W: if (ow > towidth) { toheight = originalImage.Height * width / originalImage.Width; } else { towidth = ow; toheight = oh; } break; case ThumnailMode.H: towidth = originalImage.Width * height / originalImage.Height; break; case ThumnailMode.Cut: if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight) { oh = originalImage.Height; ow = originalImage.Height * towidth / toheight; y = 0; x = (originalImage.Width - ow) / 2; } else { ow = originalImage.Width; oh = originalImage.Width * height / towidth; x = 0; y = (originalImage.Height - oh) / 2; } break; default: break; } bitmap = new Bitmap(towidth, toheight); g = Graphics.FromImage(bitmap); g.InterpolationMode = InterpolationMode.High; g.SmoothingMode = SmoothingMode.HighQuality; g.Clear(Color.Transparent); g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight), new Rectangle(x, y, ow, oh), GraphicsUnit.Pixel); fileType = fileType.ToLower(); ImageFormat imageFormat = ImageFormat.Jpeg; if (fileType == "gif") { imageFormat = ImageFormat.Gif; } if (fileType == "bmp") { imageFormat = ImageFormat.Bmp; } if (fileType == "png") { imageFormat = ImageFormat.Png; } if (fileType == "jpg" || fileType == "jpeg") { imageFormat = ImageFormat.Jpeg; } bitmap.Save(outputFileName, imageFormat); if (originalImage != null) { originalImage.Dispose(); } if (bitmap != null) { bitmap.Dispose(); } if (g != null) { g.Dispose(); } }
public static void Create(string inputFileName, string outputFileName, int width, int height, ThumnailMode mode, string fileType) { Image originalImage = Image.FromFile(inputFileName); Create(originalImage, outputFileName, width, height, mode, fileType); }