.net又一個生成縮略圖的方法，不變形

生成縮略圖是一個十分常用功能，找到了一個方法，重寫部分代碼，實用又好用，.net又一個生成縮略圖的方法，不變形

 

        /// <summary> 
        /// 為圖片生成縮略圖 by 何問起
        /// </summary> 
        /// <param name="phyPath">原圖片的路徑</param> 
        /// <param name="width">縮略圖寬</param> 
        /// <param name="height">縮略圖高</param> 
        /// <returns></returns> 
        public System.Drawing.Image GetHvtThumbnail(System.Drawing.Image image, int width, int height)
        {
          //代碼是從開源項目HoverTreeCMS中獲取的
          //更多信息請參考：http://hovertree.com/menu/hovertreecms/
            Bitmap m_hovertreeBmp = new Bitmap(width, height);
            //從Bitmap創建一個System.Drawing.Graphics 
            Graphics m_HvtGr = Graphics.FromImage(m_hovertreeBmp);
            //設置  
            m_HvtGr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            //下面這個也設成高質量 
            m_HvtGr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            //下面這個設成High 
            m_HvtGr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            //把原始圖像繪制成上面所設置寬高的縮小圖 
            Rectangle rectDestination = new Rectangle(0, 0, width, height);

            int m_width, m_height;
            if (image.Width * height > image.Height * width)
            {
                m_height = image.Height;
                m_width = (image.Height * width) / height;
            }
            else
            {
                m_width = image.Width;
                m_height = (image.Width * height) / width;
            }

            m_HvtGr.DrawImage(image, rectDestination, 0, 0, m_width, m_height, GraphicsUnit.Pixel);

            return m_hovertreeBmp;
        }

 

 

需要引用命名空間：System.Drawing

轉載自：http://hovertree.com/hvtart/bjae/9o2rqm6t.htm

ASP.NET開源CMS  http://www.cnblogs.com/sosoft/p/cms.html

開發技術文章收集 http://www.cnblogs.com/sosoft/p/kaifajishu.html