将一张图片处理成多张不用尺寸的图片 自动生成缩略图
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using
System;using
System.Collections.Generic;using
System.Linq;using
System.Web;using
System.Web.UI;using
System.Web.UI.WebControls;using
System.IO;using
System.Drawing.Imaging;using
System.Drawing;public
partial class ImageHandler : System.Web.UI.Page{ protected
void Page_Load(object
sender, EventArgs e) { try { foreach
(string
f in
Request.Files.AllKeys) { CreateNewSizePic(sPath, sPath + fileName, fileName, ".jpg"); } } catch
(Exception ex) { Response.Write("error"); } Response.End(); } /// <summary> /// 将一张图片处理成多张不用尺寸的图片 /// path 文件需要保存的路径(E:\新建文件夹2) /// orifielpath 当前原图文件的路径(E:\新建文件夹\1.jpg) /// orifilename 原图文件名称（1.jpg） /// fileType 原图后缀名（.jpg） /// </summary> /// <param name="filename"></param> public
static string CreateNewSizePic(string
path, string
orifielpath, string
orifilename, string
fileType) { Bitmap bm = new
Bitmap(orifielpath); SaveThumbnail(bm, 310, 310, path, orifilename + "_310X310", fileType); SaveThumbnail(bm, 230, 230, path, orifilename + "_230X230", fileType); SaveThumbnail(bm, 160, 160, path, orifilename + "_160X160", fileType); SaveThumbnail(bm, 80, 80, path, orifilename + "_80X80", fileType); SaveThumbnail(bm, 60, 60, path, orifilename + "_60X60", fileType); return
path; } private
static void SaveThumbnail(Bitmap originBitmap, int
width, int
height, string
directory, string
filename, string
extension) { var
physicalPath = directory + filename + extension; using
(var
newImage = new
Bitmap(width, height)) { using
(var
graphic = GetGraphic(originBitmap, newImage)) { graphic.DrawImage(originBitmap, 0, 0, width, height); using
(var
encoderParameters = new
EncoderParameters(1)) { encoderParameters.Param[0] = new
EncoderParameter(Encoder.Quality, 100L); newImage.Save(physicalPath, ImageCodecInfo.GetImageEncoders().Where(x => x.FilenameExtension.Contains(extension.ToUpperInvariant())).FirstOrDefault(), encoderParameters); } } } } private
static Graphics GetGraphic(System.Drawing.Image originImage, Bitmap newImage) { newImage.SetResolution(originImage.HorizontalResolution, originImage.VerticalResolution); var
graphic = Graphics.FromImage(newImage); graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; graphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality; graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality; return
graphic; }} |
将一张图片处理成多张不用尺寸的图片 自动生成缩略图 类似淘宝主图处理,布布扣,bubuko.com
将一张图片处理成多张不用尺寸的图片 自动生成缩略图 类似淘宝主图处理
原文：http://www.cnblogs.com/panshengqiang/p/3647040.html