抓取网页代码,Streambyte[]string转换

Read a Web Page in C#

一.WinForm窗体中的实现方法：
System.Net.WebClient class:
using System.Net;
using System.Windows.Forms;

string url = "http://www.devtopics.com";
string result = null;

try
{
WebClient client = new WebClient();
result = client.DownloadString( url );
}
catch (Exception ex)
{
// handle error
MessageBox.Show( ex.Message );
}

二.WebForm的实现方法：

using System.Net;
using System.IO;
using System.Windows.Forms;

string result = null;
string url = "http://www.devtopics.com";
WebResponse response = null;
StreamReader reader = null;

try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create( url );
request.Method = "GET";
response = request.GetResponse();
reader = new StreamReader( response.GetResponseStream(), Encoding.UTF8 );
result = reader.ReadToEnd();
}
catch (Exception ex)
{
// handle error
MessageBox.Show( ex.Message );
}
finally
{
if (reader != null)
reader.Close();
if (response != null)
response.Close();
}

Stream<---->byte[]<----->string转换

//file------>stream------>xmlDocument
StreamReader streamReader = new StreamReader("D://time.txt");
XmlDocument xdoc = new XmlDocument();

//stream----->bytes[]
Stream stream = streamReader.BaseStream;
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);

//string------>bytes[]----->stream
string test = "Test 1-2-3";
byte[] byteArray = Encoding.ASCII.GetBytes(test);
Stream streamTmp = new MemoryStream(byteArray);
//MemoryStream mStream = new MemoryStream(byteArray);

//stream------>string
StreamReader sr = new StreamReader(mStream);
string text = sr.ReadToEnd();