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Sample of small data collection written in ASP. net c #

Source: Internet
Author: User
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Front-end page:
<% @ Page Language = "C #" codebehind = "gethttpcode. aspx. cs" autoeventwireup = "false" inherits = "coll_net.getpagehtml" %>
<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<HTML>
<Head>
<Title> collection example </title>
<Meta name = "generator" content = "Microsoft Visual Studio. NET 7.1">
<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://www.0579.info/
</ASP: textbox>
<Br>
<Asp: button id = "webclientbutton" runat = "server" text = "Get With WebClient"> </ASP: button>
<Asp: button id = "gettext" style = "Z-INDEX: 101; left: 208px; position: absolute; top: 72px" runat = "server"
TEXT = "gettext"> </ASP: button>
<Br>
<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>

 

 

Background source code:
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;
Using system. Text. regularexpressions;
Namespace coll_net
{
/// <Summary>
/// Abstract description of getpagehtml.
/// </Summary>
Public class getpagehtml: system. Web. UI. Page
{
Protected system. Web. UI. webcontrols. textbox urltext;
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. Button gettext;
Protected system. Web. UI. webcontrols. Button button1;
Private string pageurl = "";

Private void page_load (Object sender, system. eventargs E)
{
// Place user code here to initialize the page
}

Private void webclientbutton_click (Object sender, system. eventargs E)
{
Pageurl = urltext. text;
WebClient WC = new WebClient ();
WC. Credentials = credentialcache. defaultcredentials;
/// 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 ();
}
Private void gettext_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 ();
Contenthtml. Text = RegEx. Replace (contenthtml. Text, "<[^>] *> ","");
// Replace Spaces
Contenthtml. Text = RegEx. Replace (contenthtml. Text, "\ s + ","");
}

# Code generated by region web Form Designer
Override protected void oninit (eventargs E)
{
//
// Codegen: This call is required by the ASP. NET web form designer.
//
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
}
}

 

The following is a reference clip:

This is for accessing the Internet using the ISA Server proxy.
Modify the webrequest method:
Pageurl = urltext. text;
Webrequest request = webrequest. Create (pageurl );
WebProxy myproxy = new WebProxy ();
Myproxy = (WebProxy) request. proxy;
Myproxy. Address = new uri ("http: // proxy server: Port ");
Myproxy. Credentials = new networkcredential ("username", "password", "Domain Name ");
Request. Proxy = myproxy;
Webresponse response = request. getresponse ();


The following is a reference clip:
Another instance [〕
Private void page_load (Object sender, system. eventargs E)
{
String url = "/blog/upload/20034726115210282.gif ";
String stringfilename = URL. substring (URL. lastindexof ("/") + 1 );
String stringfilepath = request. physicalapplicationpath;
If (! Stringfilepath. endswith ("/") stringfilepath + = "/";
Msxml2.xmlhttp _ XMLHTTP = new msxml2.xmlhttpclass ();
_ XMLHTTP. Open ("get", URL, false, null, null );
_ XMLHTTP. Send ("");
If (_ XMLHTTP. readystate = 4)
{
If (system. Io. file. exists (stringfilepath + stringfilename ))
System. Io. file. Delete (stringfilepath + stringfilename );
System. Io. filestream FS = new system. Io. filestream (stringfilepath + stringfilename, system. Io. filemode. createnew );
System. Io. binarywriter W = new system. Io. binarywriter (FS );
W. Write (byte []) _ XMLHTTP. responsebody );
W. Close ();
FS. Close ();
Response. Write ("the file has been obtained. <Br> <a href = '"+ request. applicationpath + stringfilename +" 'target =' _ blank '> ");
Response. Write ("View" + stringfilename + "</a> ");
}
Else
Response. Write (_ XMLHTTP. statustext );
Response. End ();
}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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