C# 圖片裁剪代碼

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        /// <summary>        /// 縮小裁剪圖片        /// </summary>        /// <param name="int_Width">要縮小裁剪圖片寬度</param>        /// <param name="int_Height">要縮小裁剪圖片長度</param>        /// <param name="input_ImgUrl">要處理圖片路徑</param>        /// <param name="out_ImgUrl">處理完畢圖片路徑</param>        public void ImgReduceCutOut(int int_Width, int int_Height, string input_ImgUrl, string out_ImgUrl)        {            // ＝＝＝上傳標準圖大小＝＝＝            int int_Standard_Width = 160;            int int_Standard_Height = 160;            int Reduce_Width = 0; // 縮小的寬度            int Reduce_Height = 0; // 縮小的高度            int CutOut_Width = 0; // 裁剪的寬度            int CutOut_Height = 0; // 裁剪的高度            int level = 100; //縮圖的品質 1-100的範圍            // ＝＝＝獲得縮小，裁剪大小＝＝＝            if (int_Standard_Height * int_Width / int_Standard_Width > int_Height)            {                Reduce_Width = int_Width;                Reduce_Height = int_Standard_Height * int_Width / int_Standard_Width;                CutOut_Width = int_Width;                CutOut_Height = int_Height;            }            else if (int_Standard_Height * int_Width / int_Standard_Width < int_Height)            {                Reduce_Width = int_Standard_Width * int_Height / int_Standard_Height;                Reduce_Height = int_Height;                CutOut_Width = int_Width;                CutOut_Height = int_Height;            }            else            {                Reduce_Width = int_Width;                Reduce_Height = int_Height;                CutOut_Width = int_Width;                CutOut_Height = int_Height;            }            // ＝＝＝通過串連建立Image對象＝＝＝            System.Drawing.Image oldimage = System.Drawing.Image.FromFile(Server.MapPath(input_ImgUrl));            // ＝＝＝縮小圖片＝＝＝            System.Drawing.Image thumbnailImage = oldimage.GetThumbnailImage(Reduce_Width, Reduce_Height, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);            Bitmap bm = new Bitmap(thumbnailImage);            // ＝＝＝處理JPG品質的函數＝＝＝            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();            ImageCodecInfo ici = null;            foreach (ImageCodecInfo codec in codecs)            {                if (codec.MimeType == "image/jpeg")                    ici = codec;            }            EncoderParameters ep = new EncoderParameters();            ep.Param[0] = new EncoderParameter(Encoder.Quality, (long)level);            //bm.Save(Server.MapPath("2.jpg"), ici, ep);            // ＝＝＝裁剪圖片＝＝＝            Rectangle cloneRect = new Rectangle(0, 0, CutOut_Width, CutOut_Height);            PixelFormat format = bm.PixelFormat;            Bitmap cloneBitmap = bm.Clone(cloneRect, format);            // ＝＝＝儲存圖片＝＝＝            cloneBitmap.Save(Server.MapPath(out_ImgUrl), ici, ep);        }

 

C# 圖片裁剪代碼