ASP. NET mvc3 series tutorial-web pages 1.0

ArticleDirectory

• I: special files starting with "_" in Web pages 1.0 (the file name is case-insensitive)
• II: execution sequence of special files starting with "_" in multiple directories
• III: How to enable Web pages 1.0 from webforms
• IV: Appendix: Global execution sequence
• V: You may have an experienced viewer. You can use IOC in *. cshtml (provided by unity 2.0) to change themes layout.

I: special files starting with "_" in Web pages 1.0 (the file name is case-insensitive)

"_ Appstart. cshtml" & "_ pagestart. cshtml" & "_ viewstart. cshtml"

_ Appstart. cshtml-ApplicationProgramRun the following command after the global. application_start method.
Function: content to be processed during app initialization. For example, some information initialized to the database is recorded.
Function and global. application_start is similar. The difference is that the global start is executed first and then to this _ appstart. It is worth noting that it can be used in the _ appstart context. new Dynamic Features of net4 ~~ The Declaration is a type of attribute, field, indexer, parameter, return value, or type constraint.

Http://msdn.microsoft.com/zh-cn/library/dd264741.aspx

Code:

 
@{
 

This. App. startmessage = "the app has been successfully started. Congratulations! Ha ";
 

 
VaR error = This. App. Error as string;
 

 
If (error = NULL)
 

 
{
 

 
This. App. Error = "before using the new dynamic feature, assign a value ~ ";
 

 
Error = This. App. error;
 

 
@*
 

 
It is a pity that dynamic does not support smart sensing.
 

 
The program execution sequence cannot be accurately identified by 100% during compilation.
 

 
Therefore, smart sensing is impossible!
 

 
*@
 

 
}
 

 
// The app. Error dynamic field can be referenced here.
 

 
}
 

 
Code:

 
//--------------------------------------------
 

 
@{
 

 
@*~ /Views/_ viewstart. cshtml *@
 

 
Response. Write (string. Format ("<H1>{0}</H1>", App. startmessage ));
 

 
Layout = "~ /Views/shared/_ layout. cshtml ";
 

 
}
 

 
Members from:

At system. Web. webpages. Razor. webpagerazorhost

At system. Web. webpages. applicationstartpage

_ Viewstart. cshtml-executed when a single view processes a request
Function: Maybe you already think of it .... Global page_load (for view only )......
The execution sequence is after _ appstart. cshtml. After all, the layers are different.
Members from:

At system. Web. MVC. razorviewengine

In conclusion, the app initialization sequence of mvc3 is:
 

(Other file types that I cannot find are not excluded, but I know the three most widely used files)

In web pages 1.0, unless you explicitly name a View starting with "_", you will receive the following error message when requesting a page starting "_":

(This figure has been posted when razor syntax is used. Here we post it to let everyone know about it)

About the format of class names generated by *. cshtml
Assembly format generated for most pages
 

Page compilation uses individual page compilation as a single assembly with a random string. Of course, you can also use the pre-Compilation Method to compile n pages into one assembly.

II: execution sequence of special files starting with "_" in multiple directories

_ Appstart. cshtml can only be stored in the root directory ("~ /"),
If you place the _ appstart. cshtml file in the subdirectory, the file will not be executed during app initialization.

When accessing ~ /Somepage. cshtml.
Will be executed first ~ /_ Pagestart. cshtml
Then execute ~ /Somepage. cshtml
In a complex subdirectory environment:

~ /_ Pagestart. cshtml

~ /SUB/_ pagestart. cshtml

~ /SUB/somepage. cshtml

III: How to enable Web pages 1.0 from webforms

First, web pages use features to hook up with ASP. NET on its own assembly.
// Sourcefile: assemblyinfo. CS (system. Web. webpages. dll)
// Attributeclass: system. Web. preapplicationstartmethodattribute
// Feature Introduction: Provides extensions for other ASP. NET provide
// Parameter 1: ASP. NET provide type
// Parameter 2: name of the running Method
// Source:
[Assembly: preapplicationstartmethod (typeof (system. Web. webpages. preapplicationstartcode), "Start")] // line: 15
Then, we can see that ASP. NET provide of web pages is. Web. webpages. preapplicationstartcode.
The start method is start.

 
Public static void start (){
 

// Even though ASP. NET will only call each preappstart once, we sometimes internally call one
 

 
// Another preappstart to ensure that things get initialized in the right order. ASP. NET does
 

 
// Order so we have to guard against multiple CILS.
 

 
// All start callare made on same thread, so no lock needed here.
 

 
If (_ startwascalled ){
 

 
Return;
 

 
}
 

 
_ Startwascalled = true; // The start method has been called.
 

 
Webpagehttphandler. registerextension ("cshtml"); // register the extension
 

 
Webpagehttphandler. registerextension ("vbhtml"); // register the extension
 

 
// Turn off the string resource behavior which wocould not work in our simple base page
 

 
Pageparser. enablelongstringsasresources = false; // Optimization Options
 

 
Dynamicmoduleutility. registermodule (typeof (webpagehttpmodule); // The focus is here .~~ Registered a webpagehttpmodule
 

 
Scopestorage. currentprovider = new aspnetrequestscopestorageprovider ();
 

 
// Requestscopestorageprovider of ASP. NET web pages
 

 
}
 

IV: Appendix: Global execution sequence

When the webapp starts running

Application_start

Application_beginrequest

Application_authenticaterequest

Session_start

When the webapp stops running

Session_end

Application_end

When a request is inbound

Application_beginrequest

Application_authenticaterequest and then reaches *. cshtml

When *. cshtml throw new exception ();

Application_beginrequest

Application_authenticaterequest

Application_error (go to at throw and do not execute the following after *. cshtml throw)
Example:
@{
Throw new exception (); // For example only
// The following will not be executed, but will jump directly to application_error to terminate response
}

V: You may have an experienced viewer. You can use IOC in *. cshtml (provided by unity 2.0) to change themes layout.

For more details, you can create a *. cshtml file in dynamic ~~ Create a web page as needed ~ Hoho ~~~

@ * Mvc3 a new Web Development Revolution officially emerged *@