图片缩略片问题

Question

http://ghd258.cnblogs.com/archive/2006/02/26/337957.aspx

Answer 1

 //载入图片，取得长宽
            System.Drawing.Image myImg = System.Drawing.Image.FromFile(oldImg);
            int ImgWidth = myImg.Width;
            int ImgHeight = myImg.Height;            int sWidth = 100; //设置缩略图初始宽度 
            int sHeight = 75; //设置缩略图初始高度             //按比例计算出缩略图的宽度和高度 
            if (ImgWidth >= ImgHeight)
            {
                sHeight = (int)Math.Floor(Convert.ToDouble(ImgHeight) * (Convert.ToDouble(sWidth) / Convert.ToDouble(ImgWidth)));
            }
            else
            {
                sWidth = (int)Math.Floor(Convert.ToDouble(ImgWidth) * (Convert.ToDouble(sHeight) / Convert.ToDouble(ImgHeight)));
            }

Answer 2

http://blog.csdn.net/wangdetian168/archive/2007/01/18/1486759.aspx
这个应该能满足你