Asp.net mvc3 Summary

Razor view engine-basic syntax-basics-all strings starting with @ or @ {/* Code body */} (no spaces can be added directly to @ and) ASP.. NET engine. each line of code in @ {/* Code body */} must end with ";", for example, @ {var I = 10; var y = 20 ;} @ xxx does not need to use ";" as the Terminator, for example, @ I outputs 10 @ y; outputs 20; letters in the code area are case-sensitive. character Type constants must be enclosed by "", for example, @ {string str = "my string ";} -Note-if you need to output the "@" character on the page, you can use the html ascii code @. Of course, Razor also provides the smart analysis function: if the first character of @ is not a blank character, ASP. NET will not process it, for example: <p> text @ I xx </p> output text @ I xx single-line Syntax: @ {var I = 10;} multi-line Syntax: @ {var I = 10; Var y = 20;} 1. when using local variables, Razor does not support access modifiers (such as public and private, which makes no sense). It defines local variables @ {var total = 7;} on a single line ;} @ {var myMessage = "Hello World";} defines the local variable @ {var greeting = "Welcome to our site on multiple lines! "; Var weekDay = DateTime. now. dayOfWeek; var greetingMessage = greeting + "Today is:" + weekDay;} use The variable <p> The value of your account is: @ total </p> <p> The value of myMessage is: @ myMessage </p> Note: Variable concatenation output @ {var I = 10 ;} <p> text @ I text </p> will output text 10 text. But what if you want to output text10text? <P> text @ {@ I} text </p> <p> text @ I text </p>: output text @ I text <p> text @ itext </ p> output text @ itext <p> text @ itext </p> will return an error. If the method name of the output variable is the method name, it does not need to be included in @ {}. for example: <p> text@ I .ToString () text </p> using variable objects can be written directly: @ var1 @ var2 @ myObject. xx2. use logic processing @ {if (xx) {// do something} else {// do anything} 3. at @{...} use html Tag @ {<p> text </P> <div> div1 </div>} 4 internally. at @{...} the internal output text uses @: to output a single line: @ {@: This is some text @: This is text too @: @ I can also output variables} use <text/> to output multiple rows: @ {<Text> tomorrow is goodsome girl is nice </text>} 5. at @{...} internally use annotation @ {// single line annotation var I = 10; // defg} @ * multi-line comment * {@ * multi-line comment * @ var I = 10; @ * asdfasf * @} <! -- You can also use the C # default/*... */--> @ {/* multi-line comment. http://www.52mvc.com */} If it is used inside @ {...} <! --> Comment, it is output to the page. If it is in <! --Asp.net mvc --> If @ variable is used internally, @ {<! -- Time now: @ DateTime. Now. ToString () -- >} output: <! -- Time now: 4/9/2011 --> 6. type conversion AsInt (), IsInt () AsBool (), IsBool () AsFloat (), IsFloat () AsDecimal (), IsDecimal () AsDateTime (), IsDateTime () ToString () example: @ {var I = "10" ;}< p> I = @ I. asInt () </p> <! -- Output I = 10 --> 7. Use a loop <! -- Method 1 --> @ for (int I = 10; I <11; I ++) {: @ I} <! -- Method 2 -- >@{ for (int I = 10; I <11; I ++) {// do something} <! -- While similarly --> http://blog.csdn.net/jhl52771/article/details/8488232