A detailed introduction to the 3 roles of @ in C #

This article mainly introduces the 3 kinds of functions of @ in C #. Have a good reference value, follow the small series together to see it

Previously only know @ in C # in order to write the file path of \ Do not add the escape character and in front with the @ identifier, did not expect @ there are other functions

1. Ignore escape characters

For example

String fileName = "d:\\ text file \\text.txt";

After using @

String fileName = @ "d:\ text file \text.txt";

2. Let the string cross the line

For example

String strSQL = "SELECT * from HumanResources.Employee as E" + "INNER JOIN Person.Contact as C" + "on e.contactid = c.co Ntactid "+" ORDER by C.lastname ";

After using @

String strSQL = @ "SELECT * from HumanResources.Employee as E INNER joins Person.Contact as C on e.contactid = C.contactid O Rder by C.lastname ";

3. Usage in identifiers

C # is not allowed to use the keyword as an identifier (class name, variable name, method name, tablespace name, etc.), but if you add @

For example

public static void @static (int @int) {   if (@int > 0)   {    System.Console.WriteLine ("Positive Integer");   }   else if (@int = = 0)   {    System.Console.WriteLine ("Zero");   }   else   {    System.Console.WriteLine ("negative Integer");}   }

The above is the C # in the 3 role of the detailed description of the content, more relevant content please pay attention to topic.alibabacloud.com (www.php.cn)!

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