C#获取网页内容

using System.Net;


using System.IO;


using System.Text;








//方法一：


// Create a request for the URL.


WebRequest request = WebRequest.Create("http://www.hao123.com");


// If required by the server, set the credentials.


request.Credentials = CredentialCache.DefaultCredentials;


// Get the response.


HttpWebResponse response = (HttpWebResponse)request.GetResponse();


// Display the status.


Response.Write(response.StatusDescription);


// Get the stream containing content returned by the server.


Stream dataStream = response.GetResponseStream();


// Open the stream using a StreamReader for easy access.


StreamReader reader = new StreamReader(dataStream,Encoding.Default);


// Read the content.


string responseFromServer = reader.ReadToEnd();


// Display the content.


Response.Write(responseFromServer);


// Cleanup the streams and the response.


reader.Close();


dataStream.Close();


response.Close();






//方法二：


WebClient client = new WebClient();




// Add a user agent header in case the


// requested URI contains a query.




client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");




Stream data = client.OpenRead("http://www.hao123.com");


StreamReader reader = new StreamReader(data,Encoding.Default);


string s = reader.ReadToEnd();


Response.Write(s);


data.Close();


reader.Close();




//方法三：


WebClient client = new WebClient();


//client.DownloadFile("http://www.hao123.com","123.htm");


string reply = client.DownloadString("http://www.hao123.com");


Response.Write(reply);