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WebClient和WebRequest获取html代码

2024-07-12 17:47:32   221人阅读

HTML:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head id="Head1" runat="server">    <title>得到网页源代码</title></head>  <body MS_POSITIONING="GridLayout">    <form id="aspNetBuffer" method="post" runat="server">      <div align="center" style="FONT-WEIGHT: bold">得到任意网页源代码</div>      <asp:TextBox id="UrlText" runat="server" Width="400px">http://dotnet.aspx.cc/content.aspx       </asp:TextBox>      <asp:Button id="WebClientButton" Runat="server" Text="用WebClient得到" OnClick="WebClientButton_Click"></asp:Button>      <asp:Button id="WebRequestButton" runat="server" Text="用WebRequest得到" OnClick="WebRequestButton_Click"></asp:Button>            <asp:TextBox id="ContentHtml" runat="server" Width="100%" Height="360px" TextMode="MultiLine">       </asp:TextBox>    </form>  </body></html>

ASPX:

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;public partial class _Default : System.Web.UI.Page{    private string PageUrl = "";    protected void Page_Load(object sender, EventArgs e)    {    }    protected void WebClientButton_Click(object sender, EventArgs e)    {        PageUrl = UrlText.Text;        WebClient wc = new WebClient();        wc.Credentials = CredentialCache.DefaultCredentials;        ///方法一：        Byte[] pageData =http://www.mamicode.com/ wc.DownloadData(PageUrl);        ContentHtml.Text = Encoding.Default.GetString(pageData);        /// 方法二：        /// ***************代码开始**********        /// Stream resStream = wc.OpenRead(PageUrl);        /// StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default);        /// ContentHtml.Text = sr.ReadToEnd();        /// resStream.Close();        /// **************代码结束********        ///         wc.Dispose();    }    protected void WebRequestButton_Click(object sender, EventArgs e)    {        PageUrl = UrlText.Text;        WebRequest request = WebRequest.Create(PageUrl);        WebResponse response = request.GetResponse();        Stream resStream = response.GetResponseStream();        StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);        ContentHtml.Text = sr.ReadToEnd();        resStream.Close();        sr.Close();    }}


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