我要评论本文实例讲述了asp.net抓取网页内容的实现方法。分享给大家供大家参考。具体实现方法如下：
一、asp.net 使用httpwebrequest抓取网页内容
复制代码 代码如下:
/// <summary>方法一：比较推荐
/// 用httpwebrequest取得网页源码
/// 对于带bom的网页很有效，不管是什么编码都能正确识别
/// </summary>
/// <param name="url">网页地址" </param>
/// <returns>返回网页源文件</returns>
public static string gethtmlsource2(string url)
{
//处理内容
string html = "";
httpwebrequest request = (httpwebrequest)webrequest.create(url);
request.accept = "*/*"; //接受任意文件
request.useragent = "mozilla/4.0 (compatible; msie 6.0; windows nt 5.2; .net clr 1.1.4322)"; //
request.allowautoredirect = true;//是否允许302
//request.cookiecontainer = new cookiecontainer();//cookie容器，
request.referer = url; //当前页面的引用
httpwebresponse response = (httpwebresponse)request.getresponse();
stream stream = response.getresponsestream();
streamreader reader = new streamreader(stream, encoding.default);
html = reader.readtoend();
stream.close();
return html;
}
/// 用httpwebrequest取得网页源码
/// 对于带bom的网页很有效，不管是什么编码都能正确识别
/// </summary>
/// <param name="url">网页地址" </param>
/// <returns>返回网页源文件</returns>
public static string gethtmlsource2(string url)
{
//处理内容
string html = "";
httpwebrequest request = (httpwebrequest)webrequest.create(url);
request.accept = "*/*"; //接受任意文件
request.useragent = "mozilla/4.0 (compatible; msie 6.0; windows nt 5.2; .net clr 1.1.4322)"; //
request.allowautoredirect = true;//是否允许302
//request.cookiecontainer = new cookiecontainer();//cookie容器，
request.referer = url; //当前页面的引用
httpwebresponse response = (httpwebresponse)request.getresponse();
stream stream = response.getresponsestream();
streamreader reader = new streamreader(stream, encoding.default);
html = reader.readtoend();
stream.close();
return html;
}
二、asp.net 使用 webresponse 抓取网页内容
复制代码 代码如下:
public static string gethttpdata2(string url)
{
string sexception = null;
string srslt = null;
webresponse owebrps = null;
webrequest owebrqst = webrequest.create(url);
owebrqst.timeout = 50000;
try
{
owebrps = owebrqst.getresponse();
}
catch (webexception e)
{
sexception = e.message.tostring();
}
catch (exception e)
{
sexception = e.tostring();
}
finally
{
if (owebrps != null)
{
streamreader ostreamrd = new streamreader(owebrps.getresponsestream(), encoding.getencoding("utf-8"));
srslt = ostreamrd.readtoend();
ostreamrd.close();
owebrps.close();
}
}
return srslt;
}
{
string sexception = null;
string srslt = null;
webresponse owebrps = null;
webrequest owebrqst = webrequest.create(url);
owebrqst.timeout = 50000;
try
{
owebrps = owebrqst.getresponse();
}
catch (webexception e)
{
sexception = e.message.tostring();
}
catch (exception e)
{
sexception = e.tostring();
}
finally
{
if (owebrps != null)
{
streamreader ostreamrd = new streamreader(owebrps.getresponsestream(), encoding.getencoding("utf-8"));
srslt = ostreamrd.readtoend();
ostreamrd.close();
owebrps.close();
}
}
return srslt;
}
希望本文所述对大家的c#程序设计有所帮助。
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