矩形截图

/// <summary>
        ///  矩形截图
        /// </summary>
        /// <param name="bitmapImageFill">截取bitmapImage格式的图像</param>
        /// <param name="XStart"> 起始X坐标</param>
        /// <param name="YStart">起始Y坐标</param>
        /// <param name="XEnd">停止X坐标</param>
        /// <param name="YEnd">停止Y坐标</param>-
        public static BitmapSource GetPartImage(int XStart, int YStart, int XEnd, int YEnd)
        {
            BitmapSource bsPart = new CroppedBitmap(BitmapFrame.Create(bitmapImageFill), new Int32Rect(XStart, YStart, XEnd - XStart, YEnd - YStart));
            return bsPart;
        }