C#擷取網頁的HTML碼、下載網站圖片、擷取IP地址

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1、根據URL請求擷取頁面HTML代碼

/// <summary>/// 擷取網頁的HTML碼/// </summary>/// <param name="url">連結地址</param>/// <param name="encoding">編碼類別型</param>/// <returns></returns>public static string GetHtmlStr(string url, string encoding){    string htmlStr = "";    if (!String.IsNullOrEmpty(url))    {        WebRequest request = WebRequest.Create(url);            //執行個體化WebRequest對象        WebResponse response = request.GetResponse();           //建立WebResponse對象        Stream datastream = response.GetResponseStream();       //建立流對象        Encoding ec = Encoding.Default;        if (encoding == "UTF8")        {            ec = Encoding.UTF8;        }        else if (encoding == "Default")        {            ec = Encoding.Default;        }        StreamReader reader = new StreamReader(datastream, ec);        htmlStr = reader.ReadToEnd();                           //讀取資料        reader.Close();        datastream.Close();        response.Close();    }    return htmlStr;}

2、下載網站圖片

/// <summary>/// 下載網站圖片/// </summary>/// <param name="picUrl"></param>/// <returns></returns>public string SaveAsWebImg(string picUrl){    string result = "";    string path = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + @"/File/";  //目錄    try    {        if (!String.IsNullOrEmpty(picUrl))        {            Random rd = new Random();            DateTime nowTime = DateTime.Now;            string fileName = nowTime.Month.ToString() + nowTime.Day.ToString() + nowTime.Hour.ToString() + nowTime.Minute.ToString() + nowTime.Second.ToString() + rd.Next(1000, 1000000) + ".jpeg";            WebClient webClient = new WebClient();            webClient.DownloadFile(picUrl, path + fileName);            result = fileName;        }    }    catch { }    return result;}

3、擷取本地IP地址

   /// <summary>        /// 擷取本地IP地址資訊        /// </summary>        public string GetAddressIP()        {            ///擷取本地的IP地址            string AddressIP = string.Empty;            foreach (IPAddress _IPAddress in Dns.GetHostEntry(Dns.GetHostName()).AddressList)            {                if (_IPAddress.AddressFamily.ToString() == "InterNetwork")                {                    AddressIP = _IPAddress.ToString();                }            }           return AddressIP.ToString();        }

 

C#擷取網頁的HTML碼、下載網站圖片、擷取IP地址