命名空间: using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.IO; using System.Net; using System.Text; 看我的吧 PageUrl = UrlText.Text; WebClient wc = new WebClient(); //把已登录的用户或正被模拟的用户的用户凭据赋给用于对向Internet资源的请求进行身份验证的网络凭据 wc.Credentials = CredentialCache.DefaultCredentials;///方法一: ///从指定的URI下载数据 Byte[] pageData = wc.DownloadData(PageUrl); //把下载到的字符型数组数据转换成字符串类型 ContentHtml.Text = Encoding.Default.GetString(pageData); ContentHtml.Text=Encoding.ASCII.GetString(ContentHtml.Text); /// 方法二 //为指定的URI打开一个可读的数据流,并定义一个该流的引用 /// Stream resStream = wc.OpenRead(PageUrl); /// 根据上面定义的数据流,以默认编码的方式定义一个读数据流 /// StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default); /// 读取数据流中的内容 /// ContentHtml.Text = sr.ReadToEnd(); /// //关闭数据流 /// resStream.Close(); /// //释放资源 wc.Dispose();
Stream stm = request.GetResponse().GetResponseStream();
StreamReader reader = new StreamReader(stm,System.Text.Encoding.GetEncoding("gb2312"));//or Utf-8等
string html = reader.ReadToEnd(); //即得到的html
stm.Close();
reader.Close();
{
string sHtml = "";
HttpWebRequest request;
HttpWebResponse response=null;
Stream stream; while (true)
{
try
{
request =(HttpWebRequest)WebRequest.Create(sUrl);
response=(HttpWebResponse)request.GetResponse();
stream=response.GetResponseStream();
sHtml=new StreamReader(stream,System.Text.Encoding.Default).ReadToEnd();
break;
}
catch (Exception e)
{
if (response!=null) response.Close();
DialogResult result=
MessageBox.Show(null,"Http request time out. Do you want to retry?","Time Out Error",MessageBoxButtons.YesNo);
if (result==DialogResult.No)
throw e; }
}
stream.Close();
response.Close();
return sHtml;
}
无法将类型“System.Net.WebRequest”隐式转换为“System.Net.HttpWebRequest”在这一行
HttpWebRequest request = HttpWebRequest.Create("www.123du.com");
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net;
using System.Text;
看我的吧
PageUrl = UrlText.Text;
WebClient wc = new WebClient();
//把已登录的用户或正被模拟的用户的用户凭据赋给用于对向Internet资源的请求进行身份验证的网络凭据
wc.Credentials = CredentialCache.DefaultCredentials;///方法一:
///从指定的URI下载数据
Byte[] pageData = wc.DownloadData(PageUrl);
//把下载到的字符型数组数据转换成字符串类型
ContentHtml.Text = Encoding.Default.GetString(pageData);
ContentHtml.Text=Encoding.ASCII.GetString(ContentHtml.Text);
/// 方法二
//为指定的URI打开一个可读的数据流,并定义一个该流的引用
/// Stream resStream = wc.OpenRead(PageUrl);
/// 根据上面定义的数据流,以默认编码的方式定义一个读数据流
/// StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default);
/// 读取数据流中的内容
/// ContentHtml.Text = sr.ReadToEnd();
/// //关闭数据流
/// resStream.Close();
///
//释放资源
wc.Dispose();
PageUrl = UrlText.Text;
//根据指定的UR建立WEB请求
WebRequest request = WebRequest.Create(PageUrl);
//定义对上面WEB请求的反应
WebResponse response = request.GetResponse();
//取得WEB响应的数据流
Stream resStream = response.GetResponseStream();
//根据上面定义的数据流,以默认编码的方式定义一个读数据流
StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);
// 读取数据流中的内容
ContentHtml.Text = sr.ReadToEnd();
//关闭数据流
resStream.Close();
//关闭读数据流并释放资源
sr.Close();
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("www.123du.com");
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这样就可以了。
或者直接用:
WebRequest request = WebRequest.Create("http://www.123du.com");
我的帖子,虽然有问题,但访问sina.com还是可以的
http://community.csdn.net/Expert/topic/4935/4935505.xml?temp=.3209192
http://community.csdn.net/Expert/topic/4935/4935505.xml?temp=.3209192