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webclient 和httpclient 应用

//webclient应用
MyImageServerEntities db = new MyImageServerEntities(); public ActionResult Index() { return View(); } public ActionResult FileUpload() { HttpPostedFileBase file = Request.Files["fileUp"]; string fileName = Path.GetFileName(file.FileName); string fileExt = Path.GetExtension(fileName); if (fileExt == ".jpg") { var list=db.ImageServerInfo.Where<ImageServerInfo>(u => u.FlgUsable == true).ToList();//找出可用的图片服务器. int count = list.Count(); Random random = new Random(); int r = random.Next(); int i = r % count; string serverUrl = list[i].ServerUrl; int serverId = list[i].ServerId; string url = "http://"+serverUrl+"/FileUp.ashx?serverId="+serverId+"&fileExt="+fileExt; WebClient webClient =new WebClient(); webClient.UploadData(url, StreamToBytes(file.InputStream)); } return Content("ok"); } public ActionResult ShowImage() { var list= db.ImageServerInfo.Where<ImageServerInfo>(c=>c.FlgUsable==true).ToList(); ViewData["imageServerList"] = list; return View(); } private byte[] StreamToBytes(Stream stream) { byte[]buffer=new byte[stream.Length]; stream.Read(buffer, 0, buffer.Length); stream.Seek(0, SeekOrigin.Begin); return buffer; }

           context.Response.ContentType = "text/plain";
            int serverId = int.Parse(context.Request["serverId"]);
            string fileExt = context.Request["fileExt"];
            string dir = "/ImagePath/" + DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day + "/";
            Directory.CreateDirectory(Path.GetDirectoryName(context.Request.MapPath(dir)));
            string newfileName = Guid.NewGuid().ToString();
            string fullDir = dir + newfileName + fileExt;
            using (FileStream fileStream = File.Open(context.Request.MapPath(fullDir), FileMode.OpenOrCreate))
            {
                context.Request.InputStream.CopyTo(fileStream);
                MyImageServerEntities db = new MyImageServerEntities();
                ImageInfo imageInfo = new ImageInfo();
                imageInfo.ImageName = fullDir;
                imageInfo.ImageServerId = serverId;
                db.ImageInfo.Add(imageInfo);
                db.SaveChanges();

            }

  

 

 

//httpclient 应用

创建并初始化对象:
    client.BaseAddress = new Uri(url);
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

读集合:
    HttpResponseMessage response = client.GetAsync(url).Result;
     var userList = response.Content.ReadAsAsync<IEnumerable<数据类型>>().Result;

根据编号读对象
    HttpResponseMessage response1 = client.GetAsync(url).Result;
    var userInfo = response1.Content.ReadAsAsync<数据类型>().Result;

增加:
    HttpResponseMessage response = client.PostAsJsonAsync("api/userinfo", userInfo).Result;
    使用response.IsSuccessStatusCode判断是否成功
    使用response.Content.ToString()获取返回值

修改:
     HttpResponseMessage response = client.PutAsJsonAsync("api/userinfo/"+userInfo.UserId, userInfo).Result;
    使用response.IsSuccessStatusCode判断是否成功
    使用response.Content.ToString()获取返回值

删除:
    HttpResponseMessage response = client.DeleteAsync("api/userinfo/" + uid).Result;
    使用response.IsSuccessStatusCode判断是否成功
    使用response.Content.ToString()获取返回值

 

posted on 2016-08-10 22:17  简简单单2018  阅读(5018)  评论(0编辑  收藏  举报