c#如何比较Image的宽高？

Question

            for (int i = 0; i < dlPic.Items.Count; i++)//
            {
                Image image = (Image)dlPic.Items[i].FindControl("img1");//从datalist的循环中findcontrol到img1
                int w=Convert.Toint32(image.Height.Value);//这样转换失败
                int h = Convert.ToUInt32(image.Height);//这样转换也失败
                if (w > h)
                {
                    image.Style.Add("width","50px");
                }
                else
                {
                     image.Style.Add("height","50px");
                }
            }似乎要将Image控件的宽高进行比较很难，试过很多方法都不行，大家有什么好方法吗？？

Answer 1

for (int i = 0; i < dlPic.Items.Count; i++)//
        {
            Image image = (Image)dlPic.Items[i].FindControl("img1");//从datalist的循环中findcontrol到img1
            int w = Convert.Toint32(image.Width.ToString().Substring(0, image.Width.ToString().Length - 2));
            int h = Convert.ToUInt32(image.Height.ToString().Substring(0, image.Height.ToString().Length - 2));
            if (w > h)
            {
                image.Style.Add("width", "50px");
            }
            else
            {
                image.Style.Add("height", "50px");
            }
        }

Answer 2

Reset image:
http://www.cnblogs.com/insus/articles/1909037.html
http://www.cnblogs.com/insus/articles/2060601.html

Answer 3

漏了这个：
http://www.cnblogs.com/insus/articles/2048578.html

Answer 4

<img src="images/1.jpg" onload="DrawImage(this,50,50)" />    <script type="text/javascript">
        function DrawImage(obj,width,height){
            var img = new Image();
            img.src=obj.src;
            if(img.width>width)
                obj.width=width;
            if(img.height>height)
                obj.height=height;
        }
    </script>