C#中@的作用

C#中@的作用

@的作用
1,忽略转义字符
例如
string fileName = "D:\\文本文件\\text.txt";
使用@后
string fileName = @"D:\文本文件\text.txt";
2,让字符串跨行输出
例如:

string strSQL = "SELECT * FROM HumanResources.Employee AS e"
 + " INNER JOIN Person.Contact AS c"
 + " ON e.ContactID = c.ContactID"
 + " ORDER BY c.LastName";

使用@后

string strSQL = @"SELECT * FROM HumanResources.Employee AS e
 INNER JOIN Person.Contact AS c
 ON e.ContactID = c.ContactID
 ORDER BY c.LastName";

3,在标识符中的使用
C#是不允许关键字作为标识符(类名、变量名、方法名、表空间名等)使用的,但如果加上@
之后就可以了
例如:

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");
   }


 

猜你喜欢

转载自blog.csdn.net/weixin_38055381/article/details/87904575