3. Understand the running mechanism of the page class (for example, generating static files in the render method)

Here I only write a few common events
1. OnPreinit: this event will load personalized information and themes
2. OnInit: initializes the default value of the server control on the page, but the control status is not loaded. No control tree is created.
3. OnPreload: the completion status of the control and the loading of the returned data
4. page_load: this event is onSubscribed in init
5. Render: displays the final page content

Assume that there isArticleDatabase
Previously, articles. aspx was used? Id = 123 dynamic access
Now we want to reduce the pressure on the server and generate static files for the article.
First look at the articles. aspxProgram

Using System;
Using System. collections;
Using System. configuration;
Using System. DaTa;
Using System. text;
Using System. Web;
Using System. Web. Security;
Using System. Web. UI;
Using System. Web. UI. htmlcontrols;
Using System. Web. UI. webcontrols;
Using System. Web. UI. webcontrols. webparts;
Using System. IO; // Stringwriter namespace

Namespace _ 1
{
Public   Partial   Class Article: system. Web. UI. Page
{
Protected   Void Page_load ( Object Sender, eventargs E)
{
If ( ! String . Isnullorempty (request [ " ID " ])
Label1.text =   " The content of this article is: " + Request [ " ID " ]. Tostring ();
}

Protected   Override   Void Render (htmltextwriter writer)
{
Stringwriter SW =   New Stringwriter (); // This is not much different from stringbuilder.
Htmltextwriter htmlw =   New Htmltextwriter (SW );
Base . Render (htmlw ); // No writer passed in
Htmlw. Flush ();
Htmlw. Close ();
String Pagecontent = Sw. tostring ();
String Path = Server. mappath ( " ~ /Article/ " );
String Pageurl = Xland. mymodule. getfilename (httpcontext. Current );
Using (Streamwriter stringwriter = File. appendtext (Path + Pageurl ))
{
Stringwriter. Write (pagecontent );
}
Response. Write (pagecontent );
}
}
}

We still use custom httpmodules to rewrite the URL.
The webconfig file remains unchanged.

<? XML version = "1.0" ?>
< Configuration >
< System. Web >
< Compilation Debug = "True" > </ Compilation >
< Httpmodules >
< Add Name = "Mymodule" Type = "Xland. mymodule"   />
</ Httpmodules >
</ System. Web >
</ Configuration >

Mymodule Program

Using System;
Using System. Collections. Generic;
Using System. Web; // Reference a web namespace
Using System. text;
Using System. IO;

Namespace Xland
{
Public   Class Mymodule: ihttpmodule
{
Public   Void Init (httpapplication context)
{
Context. beginrequest + = New Eventhandler (context_beginrequest );
}
Public   Void Context_beginrequest ( Object Sender, eventargs E)
{
Httpapplication = (Httpapplication) sender;
Httpcontext Context = Application. context;
// Apprelativecurrentexecutionfilepath does not include the passed parameters.
If (Context. Request. apprelativecurrentexecutionfilepath. tolower (). endswith ( " . Aspx " ))
{
String Fileurl =   " ~ /Article/ "   + Getfilename (context );
If (File. exists (context. server. mappath (fileurl )))
{
Context. rewritepath (fileurl, False );
}
}
}
Public   Static   String Getfilename (httpcontext context)
{
Return Context. Request. apprelativecurrentexecutionfilepath. tolower (). Replace ( " . Aspx " , "" ). Replace ( " ~ / " , "" ) + Context. Request. url. query. Replace ( " ? Id = " , " _ " ) +   " . Html " ;
}
Public   Void Dispose (){}
}
}

There will be no more comments. I believe you can understand them.

This example is only used to describe the page class render event.
Exercise caution when using the project.
Because it will cause a large number of server Io
This is not the best solution for generating static pages.