转换图片的高度和宽度 - ConvertWidthHeightClass

2017-02-02 19:02:27 访问(3209) 赞(0) 踩(0)



    /// <summary>
    /// 转换图片的高度和宽度
    /// </summary>
    /// <param name="cur">当前图片的高度和宽度</param>
    /// <param name="allow">页面允许的图片的最大高度和最大宽度</param>
    /// <returns></returns>
    public WidthHeightClass ConvertWidthHeightClass
        (
            WidthHeightClass cur,
            WidthHeightClass allow
        )
    {
        int returnHeight = -1;
        int returnWidth = -1;

        if (cur.Width <= allow.Width)
        {
            if (cur.Height <= allow.Height)
                return cur;

            returnHeight = allow.Height;

            returnWidth = (cur.Width * allow.Height) / cur.Height;

            return new WidthHeightClass(returnWidth, returnHeight);
        }
        else
        {
            if (cur.Height <= allow.Height)
            {
                returnWidth = allow.Width;

                returnHeight = (cur.Height * allow.Width) / cur.Width;

                return new WidthHeightClass(returnWidth, returnHeight);
            }
            else
            {
                returnWidth = allow.Width;

                returnHeight = (cur.Height * allow.Width) / cur.Width;

                if (returnHeight > allow.Height)
                {
                    returnHeight = allow.Height;

                    returnWidth = (cur.Width * allow.Height) / cur.Height;
                }

                return new WidthHeightClass(returnWidth, returnHeight);
            }
        }
    }

    /// <summary>
    /// 宽和高的结构
    /// </summary>
    [Serializable]
    public class WidthHeightClass
    {
        /// <summary>
        /// 宽和高的结构
        /// </summary>
        public WidthHeightClass()
        {

        }

        /// <summary>
        /// 宽和高的结构
        /// </summary>
        /// <param name="_Width"></param>
        /// <param name="_Height"></param>
        public WidthHeightClass(int _Width, int _Height)
        {
            m_Width = _Width;

            m_Height = _Height;
        }

        /// <summary>
        /// 宽
        /// </summary>
        protected int m_Width = 0;

        /// <summary>
        /// 宽
        /// </summary>
        public int Width
        {
            get
            {
                return m_Width;
            }
            set
            {
                m_Width = value;
            }
        }

        /// <summary>
        /// 高
        /// </summary>
        protected int m_Height = 0;

        /// <summary>
        /// 高
        /// </summary>
        public int Height
        {
            get
            {
                return m_Height;
            }
            set
            {
                m_Height = value;
            }
        }
    }