.net 文件图片上传接口

[Route("api/[controller]")]
    public class PicturesController : Controller
    {
        private IHostingEnvironment hostingEnv;
        string[] pictureFormatArray = { "png", "jpg", "jpeg", "bmp", "gif", "ico", "PNG", "JPG", "JPEG", "BMP", "GIF", "ICO" };
        public PicturesController(IHostingEnvironment env)
        {
            this.hostingEnv = env;
        }
        [HttpPost]
        public IActionResult Post(int isThumbnail,int width,int height)
        {
            var controller = Request.Headers[HeaderNames.Referer].ToString().Replace("http://", "").Replace(Request.Host.ToString(), "").Split('/')[1];
            var files = Request.Form.Files;
            long size = files.Sum(f => f.Length);

            //size > 100MB refuse upload !
            if (size > 10485760)
            {
                return Json(new Response() { Code = ResponseCode.Success, Message = "上传文件不能超过10MB" });
            }
            var file = files[0];
            var fileName = System.Net.Http.Headers.ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.Trim('"');

            string filePath = hostingEnv.WebRootPath + $@"\upload\Pictures\{controller}\";

            if (!Directory.Exists(filePath))
            {
                Directory.CreateDirectory(filePath);
            }
            
            string suffix = fileName.Split('.')[1];

            if (!pictureFormatArray.Contains(suffix))
            {
                return Json(new Response() { Code = ResponseCode.Success, Message = "只能上传图片格式文件" });
            }

            fileName = Guid.NewGuid() + "." + suffix;
            string fileFullName = filePath + fileName;
            if (isThumbnail!=0)
            {
           
                Utils.SaveImageByWidthHeight(width,height, file.OpenReadStream(), fileFullName);
            }
            else
            {
                using (FileStream fs = System.IO.File.Create(fileFullName))
                {
                    file.CopyTo(fs);
                    fs.Flush();
                }
            }
            //return Json(new Response() { Code = ResponseCode.Success, Message = "上传成功", Value = $"/upload/Pictures/{controller}/{fileName}" });
            return Json(new { code = 0, data = new { src = $"/upload/Pictures/{controller}/{fileName}",title= fileName } });
        }

    }

图片压缩方法：引用ZKWeb.System.Drawing

/// <summary>
        /// 等比例压缩图片
        /// </summary>
        public static void SaveImageByWidthHeight(int intImgCompressWidth, int intImgCompressHeight, Stream stream, string strFileSavePath)
        {
            //从输入流中获取上传的image对象
            using (Image img = Image.FromStream(stream))
            {
                //根据压缩比例求出图片的宽度
                int intWidth = intImgCompressWidth / intImgCompressHeight * img.Height;
                int intHeight = img.Width * intImgCompressHeight / intImgCompressWidth;
                //画布
                using (Bitmap bitmap = new Bitmap(img, new Size(intImgCompressWidth, intImgCompressHeight)))
                {
                    //在画布上创建画笔对象
                    using (Graphics graphics = Graphics.FromImage(bitmap))
                    {
                        //将图片使用压缩后的宽高,从0，0位置画在画布上
                        graphics.DrawImage(img, 0, 0, intImgCompressWidth, intImgCompressHeight);
                        //保存图片
                        bitmap.Save(strFileSavePath);
                    }
                }
            }
        }