面向对象设计经典案例，海报生成程序

直接上代码了，主要是做一个根据不同条件做海报生成的程序，如果不用面向对象设计会在程序里加入太多的判断，导致写出无法维护的代码：

 [HttpPost("Base64ToImgFile")]
        public IActionResult Base64ToImgFile([FromForm]string strJson)
        {
            
            dynamic m= Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(strJson);
            string Base64 = m.Base64;
            Base64 = Base64.Replace("data:image/jpeg;base64,", "");
            int Sex = m.Sex;
            NewYearBabyService ns = new NewYearBabyService(Sex);
            string basePath = "resource\images\public\image\";
            string posterPath = _AppConfigurtaionServices.AppConfigurations.UploadFileDir + basePath+ ns.GetImgName();//男女用不同的图
            Bitmap bitmapbg = new Bitmap(1080, 1920);
            Bitmap image = new Bitmap(posterPath);
            Bitmap headImage = YLYUN.Core.Helper.FileHelper.Base64ToImage(Base64);
            Graphics graph = Graphics.FromImage(bitmapbg);
            //graph.DrawImage(headImage, 30, 800); //直接嵌入
            headImage = YLYUN.Core.Helper.FileHelper.CutEllipse(headImage, new Rectangle(0, 0, 620, 620), new Size(ns.HeadSizeWidth,ns.HeadSizeHeight));

            //Bitmap bitmapbg = new Bitmap(100, 100);
            //Bitmap image = YLYUN.Core.Helper.FileHelper.Base64ToImage();
            //Graphics graph = Graphics.FromImage(image);
            //graph.DrawImage(image, 0, 0);

            graph.DrawImage(headImage, ns.HaedX, ns.HaedY); //转换圆形后嵌入


            graph.DrawImage(image, 0, 0, 1080, 1920);

            //graph.DrawImage(bitmapbg, 100, 480); //转换圆形后嵌入
            graph.Dispose();
            string savaPath = basePath + Guid.NewGuid().ToString() + ".jpg";
            string FilePath = _AppConfigurtaionServices.AppConfigurations.UploadFileDir + savaPath;
            bitmapbg.Save(FilePath);
            //FileStream fs = new FileStream(Base64);
            //拿到裁剪图片与底图融合成新图片
            return Ok(_AppConfigurtaionServices.AppConfigurations.ResourceUrlPath + savaPath);
        }

支撑的参数类：

 public NewYearBabyService(int Sex)
        {
            this.Sex = Sex;
        }


        public const string BoyImg = "BabyBoy";

        public const string GirlImg = "BabyGirl";

        public const string ImgExt = ".png";

        public int Sex { get; set; }


        public int HaedX { get {
                if (this.Sex==1)
                {
                    return 315;
                }
                else
                {
                    return 335;
                }
            } }


        public int HaedY
        {
            get
            {
                if (this.Sex == 1)
                {
                    return 915;
                }
                else
                {
                    return 898;
                }
            }
        }


        public int HeadSizeWidth
        {
            get
            {
                if (this.Sex == 1)
                {
                    return 430;
                }
                else
                {
                    return 410;
                }
            }
        }


        public int HeadSizeHeight
        {
            get
            {
                if (this.Sex == 1)
                {
                    return 430;
                }
                else
                {
                    return 410;
                }
            }
        }



        public string GetImgName()
        {
            Random rd = new Random(Guid.NewGuid().GetHashCode());
            int num = rd.Next(1, 4);
            string str = this.Sex == 1 ? BoyImg : GirlImg;
            return string.Format("{0}{1}{2}", str, num, ImgExt);
        }