Bing搜索背景图抓取

首先是两个读取html的方法。两个编码格式，两个不同的方法（哪个都可以，第二个乱码，待处理）

  private static string  ReturnUTF8Html()
        {
            try
            {
                WebClient MyWebClient = new WebClient();
                MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据
                Byte[] pageData = MyWebClient.DownloadData("http://www.bing.com"); //从指定网站下载数据
                //  string pageHtml = Encoding.Default.GetString(pageData);  //如果获取网站页面采用的是GB2312，则使用这句            
                string pageHtml = Encoding.UTF8.GetString(pageData); //如果获取网站页面采用的是UTF-8，则使用这句
            //    Console.WriteLine(pageHtml);//在控制台输入获取的内容
                using (StreamWriter sw = new StreamWriter("F:\\Desktop\\txt2.html"))//将获取的内容写入文本
                {
                    sw.Write(pageHtml);
                }
                return pageHtml;
            }
            catch (WebException webEx)
            {
              //  Console.WriteLine(webEx.Message.ToString());
                return webEx.Message.ToString();
            }
        }

    public static string ReturnGB2312Html()
        {
            string getWeatherUrl = "http://www.ithome.com/";

            //WebRequest webReq = WebRequest.Create(getWeatherUrl);
            //WebResponse webResp = webReq.GetResponse();
            //Stream stream = webResp.GetResponseStream();
            Stream 请求字节 = WebRequest.Create(getWeatherUrl).GetResponse().GetResponseStream();
            StreamReader 获取内容 = new StreamReader(请求字节, Encoding.GetEncoding("gb2312"));
            string html = 获取内容.ReadToEnd();
            获取内容.Close();
            请求字节.Close();
            //保存网页
            FileStream fstream = new FileStream(@"F:\Desktop\txt.html", FileMode.OpenOrCreate, FileAccess.Write);
            byte[] buffer = Encoding.Default.GetBytes(html);
            fstream.Write(buffer, 0, buffer.Length);
            fstream.Close();
            fstream.Dispose();
            return html;
        }

抓取文件

  public static string 抓取文件(string strUrl)

        {
            string strMsg = string.Empty;
            try
            {
                WebRequest request = WebRequest.Create(strUrl);
                WebResponse response = request.GetResponse();
                Stream reader = response.GetResponseStream();
                FileStream writer = new FileStream(Program.path, FileMode.OpenOrCreate, FileAccess.Write);
                //  FileStream writer = new FileStream(@"F:\Desktop\Bing"+name+".jpg", FileMode.OpenOrCreate, FileAccess.Write);
                byte[] buff = new byte[512];
                int c = 0; //实际读取的字节数 
                while ((c = reader.Read(buff, 0, buff.Length)) > 0)
                {
                    writer.Write(buff, 0, c);
                }
                writer.Close();
                writer.Dispose();
                reader.Close();
                reader.Dispose();
                response.Close();
                strMsg = "保存成功";
            }
            catch
            { }
            return strMsg;
        }

入口

static void Main(string[] args)
        {
            Console.WriteLine("正在读取网页...");
            string html= ReturnUTF8Html();
            Console.WriteLine("网页读取正常...");
            Console.WriteLine("正在匹配正则表达式...");
            // Console.WriteLine(html);
            //string w = Program.ReturnGB2312Html();
            //Console.WriteLine(w);
            //匹配正则表达式
            Match match=   Regex.Match(html, @"http://s.cn.bing.net/az/hprichbg/rb/[a-zA-Z]+_ZH-CN[0-9]{11}_1920x1080.jpg");
           
            Console.WriteLine(match.Value);

             Program.抓取文件(match.Value.ToString());
             Console.WriteLine("下载完毕！");
           
            Thread.Sleep(3000);
            //  Console.ReadKey();
           // SystemParametersInfo(20, 0, "D:\\AAA.bmp", 0x2);
        }

路径

 //路径
 public static  string path = "E:\\background\\Bing\\bing" + DateTime.Now.ToString("yyyy-MM-dd HH：m：ss") + ".jpg";