C#中实现网页下载

最新推荐文章于 2023-10-18 08:51:25 发布

原创最新推荐文章于 2023-10-18 08:51:25 发布 · 1.4k 阅读

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文章标签：

#c# #webbrowser #string #buffer #stream #exception

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第一种方法：
    【简述】：使用Webbrowser控件读取网页，将网页中的数据读成二进制的，然后使用File.WriteAllBytes()写入文件中
	private void GetWebStream()
	{
		Stream stream = webShow.DocumentStream;
                buffer = new byte[stream.Length];
                stream.Read(buffer, 0, Convert.ToInt32(stream.Length));
                //File.WriteAllBytes(address, buffer);
		stream.Write(buffer,0,Convert.ToInt32(stream.length));
	}

第二种方法：
	private void GetWebStream()
	{
	    HttpWebRequest Req = (HttpWebRequest)WebRequest.Create(webBrowser1.Url);

            Req.UserAgent = "Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.0; .NET CLR 1.1.4322)";
            Req.Timeout = 30000;

            try
            {
                StreamReader responseReader = new StreamReader(Req.GetResponse().GetResponseStream(), Encoding.Default);
                string responseData = responseReader.ReadToEnd();
                responseReader.Close();

                StreamWriter sw = new StreamWriter(@"index.html", false, Encoding.Default);
                sw.Write(responseData);
                sw.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
	}

第三种方法：
	 private void button1_Click(object sender, EventArgs e)
        {
            string filename = "index.html";
            string url = webBrowser1.Url.ToString();
            string localPath = "F://";
            DownloadOneFIleByUrlWithWebclient(filename, url, localPath);
        }

        private void DownloadOneFIleByUrlWithWebclient(string filename,string url,string localPath)
        {
            System.Net.WebClient wc = new System.Net.WebClient();
            if (File.Exists(localPath + filename) == false) 
            {
                Directory.CreateDirectory(localPath);
            }

            wc.DownloadFile(url, localPath + filename);

        }