Using the WebClient class and webrequest class provided by the. NET Framework, we can easily obtain the source code of the given URL address. The following is a complete example of C.
View examples
Getpagehtml. aspx
<% @ Page Language = "C #" validaterequest = "false" codebehind = "getpagehtml. aspx. cs"
Autoeventwireup = "false" inherits = "emeng. Exam. getpagehtml" %>
<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<HTML>
<Head>
<Title> obtain the source code of the webpage </title>
<Meta name = "generator" content = "Microsoft Visual Studio 7.0">
<Meta name = "code_language" content = "C #">
<Meta name = "vs_defaultclientscript" content = "JavaScript">
<Meta name = "vs_targetschema" content = "http://schemas.microsoft.com/intellisense/ie5">
</Head>
<Body ms_positioning = "gridlayout">
<Form ID = "aspnetbuffer" method = "Post" runat = "server">
<Div align = "center" style = "font-weight: bold"> obtain the source code of any webpage </div>
<Asp: textbox id = "urltext" runat = "server" width = "400px"> http://dotnet.aspx.cc/content.aspx
</ASP: textbox>
<Asp: button id = "webclientbutton" runat = "server" text = "Get With WebClient"> </ASP: button>
<Asp: button id = "webrequestbutton" runat = "server" text = "Get With webrequest"> </ASP: button>
<Br>
<Asp: textbox id = "contenthtml" runat = "server" width = "100%" Height = "360px" textmode = "multiline">
</ASP: textbox>
</Form>
</Body>
</Html>
Getpagehtml. aspx. CS
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;
Namespace emeng. Exam
{
/// <Summary>
/// Abstract description of getpagehtml.
/// </Summary>
Public class getpagehtml: system. Web. UI. Page
{
Protected system. Web. UI. webcontrols. Button webclientbutton;
Protected system. Web. UI. webcontrols. Button webrequestbutton;
Protected system. Web. UI. webcontrols. textbox contenthtml;
Protected system. Web. UI. webcontrols. textbox urltext;
Private string pageurl = "";
Private void page_load (Object sender, system. eventargs E)
{}
# Region web form designer generated code
Override protected void oninit (eventargs E)
{
Initializecomponent ();
Base. oninit (E );
}
/// <Summary>
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
/// </Summary>
Private void initializecomponent ()
{
This. webclientbutton. Click + = new system. eventhandler (this. webclientbutton_click );
This. webrequestbutton. Click + = new system. eventhandler (this. webrequestbutton_click );
This. Load + = new system. eventhandler (this. page_load );
}
# Endregion
Private void webclientbutton_click (Object sender, system. eventargs E)
{
Pageurl = urltext. text;
WebClient WC = new WebClient ();
WC. Credentials = credentialcache. defaultcredentials;
Strresult = WC. downloadstring (pageurl );
/// Method 1:
Byte [] pagedata = WC. downloaddata (pageurl );
Contenthtml. Text = encoding. Default. getstring (pagedata );
/// Method 2:
/// **************** Code start **********
/// Stream resstream = WC. openread (pageurl );
/// Streamreader sr = new streamreader (resstream, system. Text. encoding. Default );
/// Contenthtml. Text = Sr. readtoend ();
/// Resstream. Close ();
/// ***************** Code end ********
///
WC. Dispose ();
}
Private void webrequestbutton_click (Object sender, system. 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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