ASP.NET MVC 动态加载图像

        private ImageInfo CreateImageFile(string fileName)
        {
            if (!File.Exists(fileName))
                return null;
            Image image = Image.FromFile(fileName);
            MemoryStream ms = new MemoryStream();
            image.Save(ms, ImageFormat.Png);
            image.Dispose();
            ImageInfo result = new ImageInfo();
            result.contentType = "image/png";
            result.fileContents = ms.ToArray();
            return result;
        }

        public ActionResult DisplayImage(string fileName)
        {
            ImageInfo imageInfo = CreateImageFile(Server.MapPath(fileName));
            if (imageInfo == null)
                return imageInfo == null ? "" : File(imageInfo.fileContents, imageInfo.contentType);
        }

　　　　<img src='/Home/DisplayImage?fileName=myimage.jpg'>