Test_Tools/ImageHelp.cs

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using System;
using System.IO;
using System.Net;
namespace Tools
{
    public static class ImageHelp
    {
        #region 生成缩略图
        /// <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
        /// <code>HW:指定高宽缩放（可能变形）</code>
        /// <code>W:指定宽，高按比例  </code>
        /// <code>H:指定高，宽按比例</code>
        /// <code>CUT:指定高宽裁减（不变形） </code>
        /// <code>FILL:填充</code>
        /// </param>    
        public static bool LocalImage2Thumbs(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
            Image2Thumbs(originalImage, thumbnailPath, width, height, mode);
            originalImage.Dispose();
            return true;
        }
        /// <summary>
        /// 生成远程图片的缩略图
        /// </summary>
        /// <param name="remoteImageUrl"></param>
        /// <param name="thumbnailPath"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <param name="mode"></param>
        /// <returns></returns>
        public static bool RemoteImage2Thumbs(string remoteImageUrl, string thumbnailPath, int width, int height, string mode)
        {
            try
            {
                WebRequest request = WebRequest.Create(remoteImageUrl);
                request.Timeout = 20000;
                Stream stream = request.GetResponse().GetResponseStream();
                System.Drawing.Image originalImage = System.Drawing.Image.FromStream(stream);
                Image2Thumbs(originalImage, thumbnailPath, width, height, mode);
                originalImage.Dispose();
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="originalImage">源图</param>