Asp.Net中图片大小的缩放

在Asp.Net中显示图片的时候，如果给定一个固定大小的容器，如<Table>，图片的大小如何根据容器的大小进行比例缩放呢。以下是一个比较简单的函数，根据图片的宽高比例进行计算，缩放后保持比例不变。

        //ViewSize 外框大小
        //ImageSize 图片的实际大小
        public Size Resize(Size ViewSize, Size ImageSize)
        {
            Size MySize = new Size();
            if(ViewSize.Width > ViewSize.Height)//宽大于高
            {
                if(ImageSize.Width > ImageSize.Height)//按比例
                {
                    float scale = ImageSize.Height / (float)ImageSize.Width;
                    if(ViewSize.Height / (float)ViewSize.Width < scale)
                    {
                        MySize.Height = ViewSize.Height;
                        MySize.Width = (int)(ViewSize.Height / scale);
                    }
                    else
                    {
                        MySize.Width = ViewSize.Width;
                        MySize.Height = (int)(ViewSize.Width * scale);
                    }
                }
                else if(ImageSize.Height > ImageSize.Width)//非比例
                {
                    float scale = ImageSize.Width / (float)ImageSize.Height;
                    MySize.Height = ViewSize.Height;
                    MySize.Width = (int)(ViewSize.Height * scale);
                }
                else//正方
                {
                    MySize.Height = ViewSize.Height;
                    MySize.Width = ViewSize.Height;
                }
            }
            else if(ViewSize.Width < ViewSize.Height)//高大于宽
            {
                if(ImageSize.Width < ImageSize.Height)//按比例
                {
                    float scale = ImageSize.Width / (float)ImageSize.Height;
                    if(ViewSize.Width / (float)ViewSize.Height < scale)
                    {
                        MySize.Width = ViewSize.Width;
                        MySize.Height = (int)(ViewSize.Width / scale);
                    }
                    else
                    {
                        MySize.Height = ViewSize.Height;
                        MySize.Width = (int)(ViewSize.Height * scale);
                    }
                }
                else if(ImageSize.Height < ImageSize.Width)//非比例
                {
                    float scale = ImageSize.Height / (float)ImageSize.Width;
                    MySize.Width = ViewSize.Width;
                    MySize.Height = (int)(ViewSize.Width * scale);
                }
                else//正方
                {
                    MySize.Height = ViewSize.Width;
                    MySize.Width = ViewSize.Width;
                }
            }
            else//正方
            {
                if(ImageSize.Width > ImageSize.Height)//宽大于高
                {
                    float scale = ImageSize.Height / (float)ImageSize.Width;
                    MySize.Width = ViewSize.Width;
                    MySize.Height = (int)(ViewSize.Width * scale);
                }
                else if(ImageSize.Width < ImageSize.Height)//高大于宽
                {
                    float scale = ImageSize.Width / (float)ImageSize.Height;
                    MySize.Height = ViewSize.Height;
                    MySize.Width = (int)(ViewSize.Height * scale);
                }
                else//正方
                {
                    MySize.Height = ViewSize.Height;
                    MySize.Width = ViewSize.Height;
                }
            }
            return MySize;
        }