Changes to the ASP. MVC3 in Visual Studio 2010

A new MVC3 project in VS2010 shows that there has been a noticeable change with the MVC2 of the past.

1.asp.net MVC3 the necessary operating environment for. NET 4.0 (want to use the MVC3 in 3.5, no way!) 2. Default MVC3 template project is integrated

3. The new Razor view engine

@{     "Home page";}         MVC visit      <a href= " Http://asp.net/mvc " title="asp Website">         http://ASP. /mvc     </a>.      </p>

Ii:razor View Engine-basic syntax

Infrastructure

Any part of the code that begins with @ or @{/* code body */} (at @ and {You must not add any spaces directly) will be processed by the ASP. Each line of code in the @{/* Code body */} must be ";"     End, such as @{var i = 10; var y = 20; And @xxx do not need to ";" As a terminator, such as @i output of ten @y; Output 20; The letters in the code area are case-sensitive. Character type constants must be enclosed in "" For example: @{string str = "my string";} -note-

You can use HTML ASCII encoding & #64 If you want the "@" character in the page output; Of course Razor also provides intelligent analysis capabilities: If the previous word of @ characters is a non-whitespace character, then ASP. NET will not process it such as: <p>[email protected] xx</p> output [email protected] XX
Single-line syntax: @{var I = 10;} Multiline Syntax:

    var I = 10;

    Var y = 20;

}

1. Using local variables, razor does not support the access modifier (public,private, etc., which does not make any sense) to define local variables @{var total = 7 on a single line,} @{var mymessage = "Hello World";} define office on multiple lines Part variable

@{

    var greeting = "Welcome to our site!";

    var weekDay = DateTime.Now.DayOfWeek;

    var greetingmessage = greeting + "Today is:" + weekDay;

}

Using Variables in context

<p</P>   

<p>the value of Mymessage is: @myMessage</P>    

Note : variable splicing output @{var i = ten;} < P>text @i text</p> will output text, text, but what if you want to output text10text?

<p>[email protected]{@i}text</P>    

<p>[email protected] text</P> will output [email protected] text    

<p>[email protected]</P> will output [email protected]    

<p>text @itext</P> will error    

If the output is a variable method name does not need to be surrounded by @{} can also take effect, but note in the @ character before the space (thank Spook pointed) such as: <p>text @i.tostring () text</p> use variable object can be directly written: @ Var1 @var2 @myObject. XX

2. Using logical processing

@{

    if (XX)

    {

    Do something

    }

    Else

    {

    Do anything

    }

}

3. In @{...} Using HTML tags internally

@{

    <p>text</P>    

    <div>div1</div>    

}

4. In @{...} Internal output text using @: For single-line output:

@{

    @:this is some text

    @:this is text too

    @:@i can also output variables

}

Multi-line output with <text/>:

@{

    <text> 

        Tomorrow is good

        Some girl is nice

    </text> 

}

5. In @{...} Internal Use Notes

@{

    Single-line Comment

    var i = 10;

    Defg

}

    @* Multi-line Comment *@

        Multi-line comments

    *@

@{

    @*

        Multi-line comments

    *@

    var i = ten;  @* asdfasf *@

}

<!--can also use the C # default */* ...

@{

    /*

    */

}

If in @{...} Internal use <!----> comments are output to the page, and if the @ variable is used inside <!---->, it will be processed @{<!--time now: @DateTime. now.tostring ()--Output: <!--time now:4/9/2011 12:01-->>

6. Type conversion asint (), Isint () Asbool (), Isbool () asfloat (), Isfloat () Asdecimal (), Isdecimal () asdatetime (), Isdatetime () ToString () Example:

@{

    var i = "10";

}

<p</p    

7. Using loops

<!--Way 1-->

< 11; i++)

{

    @:@i

}

<!--Way 2-->

@{

    < 11; i++)

    {

        Do something

    }

}

<!--while empathy--

This is the end!

Changes to the ASP. MVC3 in Visual Studio 2010