Mvc3 learning Summary

This article is recorded by the scottgu's blog, with your own learning experience.

Original article address: Workshop. For future reference.

I. Razor

Razor is a new view engine that implements a fast and smooth coding process, making the view template concise and clean.

1: flexible options.

Add-> View... when creating a view template, you can select the razor (cshtml) template view or aspx (C #) template view.

2: Comparison of razor and aspx syntax

Variable variable:

In. aspx, hello: <% = Name %> does not need to be closed in razor.CodeBlock Hello: @ name

Loop and nesting:

<Ul> <% foreach (var p in Model) {%>

<Li> <% = P. ID %> </LI>

<% }%> </Ul>

In the razor engine:

<Ul> @ foreach (var p in Model ){

<Li> @ P. ID </LI>

} <Ul>

If statement code segment:

@ If (condition) {//...} else {//...}

If you want to output @, you can use @ to output @.

Eg: <p> what's your time? It's @ datetime. Now </P> what's your time? It's @ datetime. Now

In razor, HTML helper in the aspx engine is supported. Usage: @ html. textboxfor (M => M. Name)

3: Custom HTML helper that can be reused:

@ Helper themelist (int I)

{

If (I = 0)

// Do something ..;

Else // do 2;

}

Directly @ themelist (3)

3: @ Model

Dynamic type does not need to use inherite system. Web. MVC. iviewpag <...> directly use @ model strong type eg: @ model mvc3urlpro. Models. urlclass

4: loading the _ layout. cshtml and _ viewstart. cshtml pages

_ Viewstart. cshtml page: Specifies the template page for the page. You only need to add the _ viewstart page to the view folder, so you do not need to introduce the template page to each specific page.

_ Layout. cshtml page: the page for implementing the framework, that is, the template page.

Each time a page is opened, the advanced _ viewstart page runs the template page with the specified name based on the template page specified in the page. The default template page name is _ layout. cshtml.

5: Use @ * Comment statement * @ to comment on the server in razor *@

6: @: and <text> in razor

@: Explicitly specify a code block. For example: @ if (datetime. Now. Year = 2011 ){

@: This year is 2011 <br/> the date: @ datetime. Now

}

You can use multiple @: EG @: This year is 2011 to display multiple lines of code;

@: And it's a happy time;

You can also use the <text> </text> identifier in razor to display multi-line code blocks <text>

If (A = B)

{Displayed correctly ;}

Else Display error;

</Text>

7: Code expression @ and @()

Razor ParsingAlgorithm. Explicit @ () code is required

Eg: @ (A. sum ()/B. Count ()

8: _ layout template page and section in razor

@ Renderbody () on the _ layout template page: displays the body content of the page loaded by the page body.

@ Rendersection ("sectionname", required: True/false): The segments in the predefined template load the defined segments during page loading.

Eg @ section sectionname {

<P> This Is A Section One </P>

// Content ....

} The specific section definition is defined in the page.