C#网页数据采集（三）HttpWebRequest

2024-09-06 05:06:55

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">截取到网页数据是js加载完以后的</span>

<span style="white-space:pre"> </span> HtmlWeb webClient = new HtmlWeb();
string _url = "http://news.baidu.com/";
HtmlAgilityPack.HtmlDocument html1 = webClient.Load(_url);//是你需要解析的url
var end3 = html1.Encoding.BodyName;//获取页面编码格式
string _htmlSource = GetHtmlSource(_url, System.Text.Encoding.GetEncoding(end3));//还是需要设置一次编码格式避免乱码调用<span style="font-family: Arial, Helvetica, sans-serif;">GetHtmlSource方法</span>

public static string GetHtmlSource(string url, Encoding charset)
{
string _html = string.Empty;
try
{
HttpWebRequest _request = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse _response = (HttpWebResponse)_request.GetResponse();
using (Stream _stream = _response.GetResponseStream())
{
using (StreamReader _reader = new StreamReader(_stream, charset))
{
_html = _reader.ReadToEnd();
}
}
}
catch (WebException ex)
{
using (StreamReader sr = new StreamReader(ex.Response.GetResponseStream()))
{
_html = sr.ReadToEnd();
}
}
catch (Exception ex)
{
_html = ex.Message;
}
return _html;
}

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