c# 获取网页源码
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private
string
GetWebClient(
string
url)
{
string
strHTML =
""
;
WebClient myWebClient =
new
WebClient();
Stream myStream = myWebClient.OpenRead(url);
StreamReader sr =
new
StreamReader(myStream, System.Text.Encoding.GetEncoding(
"utf-8"
));
strHTML = sr.ReadToEnd();
myStream.Close();
return
strHTML;
}
C#获取指定网页HTML原代码可使用 WebClient WebRequest HttpWebRequest 三种方式来实现。当然也可使用webBrowse!在此就不研究webBrowse如何获取了。
WebClient
view sourceprint?private string GetWebClient(string url)
view sourceprint?private string GetWebClient(string url)
{
string strHTML = "";
WebClient myWebClient = new WebClient();
Stream myStream = myWebClient.OpenRead(url);
StreamReader sr = new StreamReader(myStream, System.Text.Encoding.GetEncoding("utf-8"));
strHTML = sr.ReadToEnd();
myStream.Close();
return strHTML;
}
WebRequest
view sourceprint?private string GetWebRequest(string url)
view sourceprint?private string GetWebRequest(string url)
{
Uri uri = new Uri(url);
WebRequest myReq = WebRequest.Create(uri);
WebResponse result = myReq.GetResponse();
Stream receviceStream = result.GetResponseStream();
StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
string strHTML = readerOfStream.ReadToEnd();
readerOfStream.Close();
receviceStream.Close();
result.Close();
return strHTML;
}
HttpWebRequest
view sourceprint?private string GetHttpWebRequest(string url)
view sourceprint?private string GetHttpWebRequest(string url)
{
Uri uri = new Uri(url);
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(uri);
myReq.UserAgent = "User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705";
myReq.Accept = "*/*";
myReq.KeepAlive = true;
myReq.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");
HttpWebResponse result = (HttpWebResponse)myReq.GetResponse();
Stream receviceStream = result.GetResponseStream();
//www.elivn.com
StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
//www.elivn.com
StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));
string strHTML = readerOfStream.ReadToEnd();
readerOfStream.Close();
receviceStream.Close();
result.Close();
return strHTML;
}
注意“utf-8”应与指定网页的编码对应。
总结
可以看到HttpWebRequest 方式最复杂,但确提供了更多的选择性。
可以看到HttpWebRequest 方式最复杂,但确提供了更多的选择性。
有的网站检测客户端的UserAgent!如163.com,你如果使用WebClient WebRequest方式获取时,将获取到的是错误提示页面内容。
而通过HttpWebRequest 就没问题。
测试环境:WIN2003 + VS2005 + C# + winForm
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