PJBlog相册改进

PJBLog的相册，才出的2.0。因为我的主页空间不支持ASPJpeg，不能自动生成缩略图，自己手动生成太麻烦。幸好主页支持ASP.net 2.0，因此自己做了一个asp.net版的替代生成缩略图工具，再将相册首页显示改成随机显示：）呵呵

随机查找相册内照片语句，替换install.xml内语句：
Set album_Messages=albumConns.execute("select top "&photonum&" * from blog_album where not album_Hidden order by rnd(-(album_ID+" & rnd() & "))")

以下为缩略图代码：
<%@ page language="C#" %> <%@ import Namespace="System" %>  <%@ import Namespace="System.Web" %>  <%@ import Namespace="System.Drawing" %>  <script runat="server">       void Page_Load(object sender, EventArgs e)     {         try         {             string query = Server.UrlDecode(Page.ClientQueryString);             string[] queryStrs = query.Split(';');             if (queryStrs.Length == 5)             {                 string originalImagePath = queryStrs[0];                 string thumbnailPath = queryStrs[1];                 int width = int.Parse(queryStrs[2]);                 int height = int.Parse(queryStrs[3]);                 string mode = queryStrs[4];                 MakeThumbnail(originalImagePath, thumbnailPath, width, height, mode);                 Response.Write("Success");             }             else             {                 Response.Write("请按以下顺序输入运行时参数：源图路径（物理路径）;缩略图路径（物理路径）;缩略图宽度;缩略图高度;生成缩略图的方式(HW|H|W|Cut)");             }         }         catch(Exception ex)         {             Response.Write("Failed");         }     }     /// <summary>     /// 生成缩略图     /// </summary>     /// <param name="originalImagePath">源图路径（物理路径）</param>     /// <param name="thumbnailPath">缩略图路径（物理路径）</param>     /// <param name="width">缩略图宽度</param>     /// <param name="height">缩略图高度</param>     /// <param name="mode">生成缩略图的方式</param>         public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)     {         System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);         int towidth = width;         int toheight = height;         int x = 0;         int y = 0;         int ow = originalImage.Width;         int oh = originalImage.Height;         switch (mode)         {             case "HW"://指定高宽缩放（可能变形）                                 break;             case "W"://指定宽，高按比例                                     toheight = originalImage.Height * width / originalImage.Width;                 break;             case "H"://指定高，宽按比例                 towidth = originalImage.Width * height / originalImage.Height;                 break;             case "Cut"://指定高宽裁减（不变形）                                 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;         }         //新建一个bmp图片         System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);         //新建一个画板         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;         //清空画布并以透明背景色填充         g.Clear(Color.Transparent);         //在指定位置并且按指定大小绘制原图片的指定部分         g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight),             new Rectangle(x, y, ow, oh),             GraphicsUnit.Pixel);         try         {             //以jpg格式保存缩略图             bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);         }         catch (System.Exception e)         {             throw e;         }         finally         {             originalImage.Dispose();             bitmap.Dispose();             g.Dispose();         }     }  </script> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" target="_blank">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd</a>"> <html xmlns="<a href="http://www.w3.org/1999/xhtml" target="_blank">http://www.w3.org/1999/xhtml</a>" > <head runat="server">     <title>缩略图</title> </head> <body>     <form id="form1" runat="server">     <div>          </div>     </form> </body> </html>