使用区间在c#中进行字符串切片

在C#8.0(或更高版本)中,您可以使用 ,例如

 var b = "Hello, World!";

 var result = b[2..5];

或者在旧的c#版本上, Substring :

 var b = "Hello, World!";

 // start from 2nd char (0-bazed), take 3 characters
 var result = b.Substring(2, 3);

最后,您可以使用 林克

 var b = "Hello, World!";

 // Skip first 2 characters, take 3 chars and concat back to the string 
 var result = string.Concat(b
   .Skip(2)
   .Take(3)); 

可以使用子字符串。

string hw = "hello world";
Console.WriteLine(hw.Substring(1,1), hw.Substring(5, 1));

或者将其转换为字符数组

string hw = "hello world";
var array = hw.ToCharArray();
Console.WriteLine(array[3]);

b = "Hello, World!"
Console.WriteLine(b[2..5]

此打印:

llo

最好的官方指南是 Indices and ranges .

b = "Hello, World!"
print(b[2:15])

llo, World!

在C中:

var b = "Hello, World!";
Console.WriteLine(b[2..15]);

Unhandled exception. System.ArgumentOutOfRangeException: Index and length must refer to a location within the string. (Parameter 'length')