Detailed introduction to the three functions of @ in c#
本文主要介绍了c#中@的3种作用。具有很好的参考价值,下面跟着小编一起来看下吧
以前只知道@在C#中为了写文件路径的\不要加转义符而在前面加上@标识符,没想到@还有其他的作用
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
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.在标识符中的用法
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"); } }
以上就是c#中@的3种作用的详细介绍的内容,更多相关内容请关注PHP中文网(www.php.cn)!

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