批量生成缩略图

using System.IO;
using System.Drawing;

 

    protected void ThumbnailImage()
    {
        string path = Server.MapPath("uploadfile") + "\\";
        int width = 84;
        int height = 64;

        foreach (string f in Directory.GetFileSystemEntries(path))
        {
            System.Drawing.Image original_image = null;
            Bitmap final_image = null;
            Graphics graphic = null;
            //Response.Write(path + Path.GetFileName(f) + "<br>");
            try
            {
                FileInfo file = new FileInfo(path + Path.GetFileName(f));
                //缩略图
                original_image = System.Drawing.Image.FromStream(file.OpenRead());
                final_image = new System.Drawing.Bitmap(width, height);
                graphic = System.Drawing.Graphics.FromImage(final_image);
                graphic.FillRectangle(new System.Drawing.SolidBrush(System.Drawing.Color.Black), new System.Drawing.Rectangle(0, 0, width, height));
                graphic.DrawImage(original_image, 0, 0, width, height);
                final_image.Save(string.Format("{0}\\{1}", path, "s_" + Path.GetFileName(f)));

            }
            catch (Exception ex)
            {
                Response.Write("Message" + ex.ToString());
            }
            //finally
            //{
            //    original_image.Dispose();
            //    final_image.Dispose();
            //    graphic.Dispose();
            //}
        }
    }