C#读取网页源码

　　　　#region 1.读取 网页源码 +  static string ReadHtml(string urlStr,int type)
        /// <summary>
        /// 读取 网页源码 +  static string ReadHtml(string urlStr,int type)
        /// </summary>
        /// <param name="urlStr">网址</param>
        /// <param name="type">网页编码 0:utf8,1:gbk,2:gb2312</param>
        /// <returns>返回源码</returns>
        public static string ReadHtml(string urlStr,int type)
        {
            WebClient wc = new WebClient();
            string tempStr=string.Empty;
            switch (type)
            {
                case 0:
                    //tempStr = Encoding.UTF8.GetString(wc.DownloadData(string.Format(urlStr)));
                    tempStr = Encoding.GetEncoding("utf-8").GetString(wc.DownloadData(string.Format(urlStr)));
                    break;
                case 1:
                    //tempStr = Encoding.Default.GetString(wc.DownloadData(string.Format(urlStr)));
                    tempStr = Encoding.GetEncoding("gbk").GetString(wc.DownloadData(string.Format(urlStr)));
                    break;
                case 2:
                    //tempStr = Encoding.Default.GetString(wc.DownloadData(string.Format(urlStr)));
                    tempStr = Encoding.GetEncoding("gb2312").GetString(wc.DownloadData(string.Format(urlStr)));
                    break;
                default:
                    break;
            }
            return tempStr;
        }
        #endregion

需要引用 using System.Net;