C#生成高清缩略图 （装在自OPEN经验库）

来源 http://www.open-open.com/lib/view/open1389943861320.html

代码如下实现图片的高清缩略图

/// <summary>
   /// 为图片生成缩略图
   /// </summary>
   /// <param name="phyPath">原图片的路径</param>
   /// <param name="width">缩略图宽</param>
   /// <param name="height">缩略图高</param>
   /// <returns></returns>
   public System.Drawing.Image GetThumbnail(System.Drawing.Image image, int width, int height)
   {
       Bitmap bmp = new Bitmap(width, height);
       //从Bitmap创建一个System.Drawing.Graphics
       System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bmp);
       //设置
       gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
       //下面这个也设成高质量
       gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
       //下面这个设成High
       gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
       //把原始图像绘制成上面所设置宽高的缩小图
       System.Drawing.Rectangle rectDestination = new System.Drawing.Rectangle(, , width, height);  

       gr.DrawImage(image, rectDestination, , , image.Width, image.Height, GraphicsUnit.Pixel);
       return bmp;
   }