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文章作者：未知

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代码段1＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝System.Drawing.Image image =System.Drawing.Image.FromFile(originalFilename);System.Drawing.Size size = GetImageSize(image.Width, image.Height,information.MaximumDimension);System.Drawing.Image bitmap = new System.Drawing.Bitmap(size.Width,size.Height);System.Drawing.Graphics graphics =System.Drawing.Graphics.FromImage(bitmap);graphics.InterpolationMode =System.Drawing.Drawing2D.InterpolationMode.High;graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;graphics.Clear(information.BackgroundColor);graphics.DrawImage(image, new System.Drawing.Rectangle(0, 0, bitmap.Width,bitmap.Height), new System.Drawing.Rectangle(0, 0, image.Width,image.Height), System.Drawing.GraphicsUnit.Pixel);graphics.Dispose();代码段2＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝//原始图片名称string originalFilename = "c:\\222.jpg";//生成的高质量图片名称string strGoodFile = "c:\\222-small-good.jpg";//生成的低质量图片名称string strBadFile = "c:\\222-small-bad.jpg";//缩小的倍数int iScale = 3;//从文件取得图片对象System.Drawing.Image image = System.Drawing.Image.FromFile(originalFilename);//取得图片大小System.Drawing.Size size = new Size(image.Width / iScale , image.Height / iScale);//新建一个bmp图片System.Drawing.Image bitmap = new System.Drawing.Bitmap(size.Width,size.Height);//新建一个画板System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);//设置高质量插值法g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;//设置高质量,低速度呈现平滑程度g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;//清空一下画布g.Clear(Color.Blue);//在指定位置画图g.DrawImage(image, new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), new System.Drawing.Rectangle(0, 0, image.Width,image.Height), System.Drawing.GraphicsUnit.Pixel);//保存高清晰度的缩略图bitmap.Save(strGoodFile, System.Drawing.Imaging.ImageFormat.Jpeg);//取得原图像的普通缩略图System.Drawing.Image img = image.GetThumbnailImage(image.Width / iScale, image.Height / iScale, null, IntPtr.Zero);//保存普通缩略图img.Save(strBadFile, System.Drawing.Imaging.ImageFormat.Jpeg);g.Dispose();MessageBox.Show("生成完毕");俺自己写的一段原图+缩略图代码＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝using System;using System.Collections;using System.ComponentModel;using System.Configuration;using System.Data;using System.Drawing;using System.Drawing.Imaging;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;namespace BSCRM.Shangpin{/// /// Shangpin_IMG 的摘要说明。/// public class Shangpin_IMG : System.Web.UI.Page{string ImagePath = ConfigurationSettings.AppSettings["ImagePath"]+"\\";bool error;string src;int height,width;private void Page_Load(object sender, System.EventArgs e){// 在此处放置用户代码以初始化页面height=width=0;if(Request["h"]!=null&&Request["h"].ToString().Trim()!=""){height=int.Parse(Request["h"].ToString().Trim());}if(Request["w"]!=null&&Request["h"].ToString().Trim()!=""){width=int.Parse(Request["w"].ToString().Trim());}if(Request["src"]!=null){src = ImagePath+Request["src"].ToString();try{System.Drawing.Image img = System.Drawing.Image.FromFile(src);if(height>0width>0){if(height==0) height=img.Height;if(width==0) width=img.Width;System.Drawing.Image img2 = img.GetThumbnailImage(width,height,null,IntPtr.Zero);img2.Save(Response.OutputStream,img.RawFormat);img2.Dispose();}else{ img.Save(Response.OutputStream,img.RawFormat);}img.Dispose();}catch{error = true;}}else{error = true;}if(error){Response.StatusCode = 404;Response.Write("Object Not FoundHTTP/1.1 404 Object Not Found");}}#region Web 窗体设计器生成的代码override protected void OnInit(EventArgs e){//// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。//InitializeComponent();base.OnInit(e);}/// /// 设计器支持所需的方法 - 不要使用代码编辑器修改/// 此方法的内容。/// private void InitializeComponent(){this.Load += new System.EventHandler(this.Page_Load);}#endregion}}关闭本页

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