简单抓取小程序大全，并展示。

 public class XcxApplet
    {
        public int id { get; set; }

        public string categoryName { get; set; }

        public string name { get; set; }

        public string saomaUrl { get; set; }

        public string sum { get; set; }

        public string logoUrl { get; set; }
    }

    public class Result
    {
        public List<XcxApplet> dataList { get; set; }
        public string category { get; set; }
        public int  status { get; set; }
        public int pageNum { get; set; }
    }

   public static string GetPostPage(this string posturl, string postData)
            {
                Encoding encoding = Encoding.UTF8;
                byte[] data = null;
                if (!string.IsNullOrEmpty(postData)) data = encoding.GetBytes(postData);
                try
                {
                    // 设置参数
                    var request = WebRequest.Create(posturl) as HttpWebRequest;
                    if (request == null) return string.Empty;
                    var cookieContainer = new CookieContainer();
                    request.CookieContainer = cookieContainer;
                    request.AllowAutoRedirect = true;
                    request.Method = "POST";
                    request.ContentType = "application/x-www-form-urlencoded";
                    if (data != null)
                    {
                        request.ContentLength = data.Length;
                        Stream outstream = request.GetRequestStream();
                        outstream.Write(data, 0, data.Length);
                        outstream.Close();
                    }
                    //发送请求并获取相应回应数据
                    var response = request.GetResponse() as HttpWebResponse;
                    if (response == null) return string.Empty;

                    //直到request.GetResponse()程序才开始向目标网页发送Post请求
                    Stream instream = response.GetResponseStream();
                    if (instream == null) return string.Empty;
                    var sr = new StreamReader(instream, encoding);
                    //返回结果网页（html）代码
                    string content = sr.ReadToEnd();
                    string err = string.Empty;
                    //Response.Write(content);
                    return content;
                }
                catch (Exception ex)
                {
                    string err = ex.Message;
                    return string.Empty;
                }
            }

public string  QiniuUplod(string imgurl)
        {
              
            var accessKey = "你的accesskey";
            var secretKey = "你的secretkey";

            // 生成(上传)凭证时需要使用此Mac
            // 这个示例单独使用了一个Settings类，其中包含AccessKey和SecretKey
            // 实际应用中，请自行设置您的AccessKey和SecretKey
            Mac mac = new Mac(accessKey, secretKey);
            string bucket = "siyouku";
            string saveKey = imgurl.Substring(imgurl.LastIndexOf('/')+1,imgurl.Length- imgurl.LastIndexOf('/')-1);


            // 使用前请确保AK和BUCKET正确，否则此函数会抛出异常(比如code612/631等错误)
            Qiniu.Common.Config.AutoZone(accessKey, bucket, false);


            // 上传策略，参见 
            // https://developer.qiniu.com/kodo/manual/put-policy
            PutPolicy putPolicy = new PutPolicy();
            // 如果需要设置为"覆盖"上传(如果云端已有同名文件则覆盖)，请使用 SCOPE = "BUCKET:KEY"
             putPolicy.Scope = bucket + ":" + saveKey;
            putPolicy.Scope = bucket;
            // 上传策略有效期(对应于生成的凭证的有效期)          
            putPolicy.SetExpires(3600);
            // 上传到云端多少天后自动删除该文件，如果不设置（即保持默认默认）则不删除
            //putPolicy.DeleteAfterDays = 1;

            // 生成上传凭证，参见
            // https://developer.qiniu.com/kodo/manual/upload-token            
            string jstr = putPolicy.ToJsonString();
            string token = Auth.CreateUploadToken(mac, jstr);
            try
            {
                
                var wReq = System.Net.WebRequest.Create(imgurl) as System.Net.HttpWebRequest;
                var resp = wReq.GetResponse() as System.Net.HttpWebResponse;
                using (var stream = resp.GetResponseStream())
                {
                    // 请不要使用UploadManager的UploadStream方法，因为此流不支持查找(无法获取Stream.Length)
                    // 请使用FormUploader或者ResumableUploader的UploadStream方法
                    FormUploader fu = new FormUploader();
                    var result = fu.UploadStream(stream, saveKey, token);
                    var x = Newtonsoft.Json.JsonConvert.DeserializeObject<QiniuResult>(result.Text);
                    return $"http://img.siyouku.cn/{x.key}";
                }
            }
            catch (Exception ex)
            {
                return "";
            }

 
        }

public ActionResult GetxcxList()
        {
            Stopwatch watch = new Stopwatch();//监控抓取耗时
            watch.Start();
            //https://www.xcxdh666.com/pageList.htm?pageNum=0  dataList
            var result = new Result();

            for (int j = 0; j <54; j++)
            {
                string url =
                    $"https://www.xcxdh666.com/pageList.htm?pageNum={j}";

                var str = url.GetPostPage(null);//HttpWebRequest 请求页面
                if (str != null)
                {
                    result = str.JsonConvert<Result>();  //string   的序列化扩展方法
                }

                result.dataList.ForEach(i =>
                {
                    if (!Db.Applet.Any(x => x.Name == i.name))//判断重复插入
                    {
                        var x = new Applet()
                        {
                            CategoryName = string.IsNullOrEmpty(i.categoryName) ? "其它" : i.categoryName,
                            Name = i.name,
                            SaomiaoUrl = QiniuUplod($"http://img.xcxdh666.com/wxappnav/{i.saomaUrl}"),
                            Summary = i.sum,
                            LogoUrl = QiniuUplod($"http://img.xcxdh666.com/wxappnav/{i.logoUrl}"),
                            SortNum = j,
                            CreateUser = "wenqing",
                            CreateTime = DateTime.Now

                        };
                        Db.Applet.Add(x);
                    }

                });

                Db.SaveChanges();


            }
            watch.Stop();
            return Content("爬取完成！本次请求总共耗时："+ watch.ElapsedMilliseconds);
        }
    }