webapi返回图片，mvc返回图片

最新推荐文章于 2024-07-23 14:32:03 发布

原创最新推荐文章于 2024-07-23 14:32:03 发布 · 869 阅读

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#测试 #c# #数据库

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本文详细探讨了如何在C#的WebAPI和MVC框架下实现返回图片的处理方法，包括从数据库或文件系统读取图片并以流形式响应给客户端的关键步骤，对于进行C#后端开发的测试人员和技术人员具有实用参考价值。

   public HttpResponseMessage Get(string imageName, int width, int height)
    {
        Image img = GetImage(imageName, width, height);
        MemoryStream ms = new MemoryStream();
        img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
        HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
        result.Content = new ByteArrayContent(ms.ToArray());
        result.Content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
        return result;
    }

 public FileResult UserPhoto()
        {
            byte[] image = (byte[])oc["photo" + EmployeeID];
            //get image from database   
            if (image == null)
            {
                CommonDAL cd = new CommonDAL();
                image = cd.GetUserPhoto();
                oc["photo" + EmployeeID] = image;
            }
            //return the image to View   
            if (image == null)
            {
                return new FilePathResult("~/Content/avatars/avatar2.png", "image/png");

            }
            else
            {
                return new FileContentResult(image, "image/png");
            }
            //or like below   

            //MemoryStream mem = new MemoryStream(image, 0, image.Length);   

            //return new FileStreamResult(mem, "image/jpg");

        }