之前只知道@在C#中为了写文件途径的\不要加转义符而在前面加上@标识符,没想到@另有其他的作用
1.疏忽转义字符
比方
string fileName = "D:\\文本文件\\text.txt";
运用@后
string fileName = @"D:\文本文件\text.txt";
2.让字符串跨行
比方
string strSQL = "SELECT * FROM HumanResources.Employee AS e" + " INNER JOIN Person.Contact AS c" + " ON e.ContactID = c.ContactID" + " ORDER BY c.LastName";
运用@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)运用的,但假如加上@以后就能够了
比方
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种作用的细致引见的内容,更多相关内容请关注ki4网(www.ki4.cn)!