string path = Server.MapPath("img/1.gif");
System.Drawing.Image image = System.Drawing.Image.FromFile(path);
Response.Write("宽：" + image.Width + "<br />");
Response.Write("高：" + image.Height );
asp.net 获取图片高度和宽度实例代码
原文：http://www.jb51.net/article/17667.htm
