如何从字符串右侧读取字符 [英] How to read characters from right side in string

问题描述

如何从字符串右侧读取字符............





请建议



我尝试了什么：



string =samplestring;

string.Substring（string.Length - 4,4）;



它给出结果，但是从左侧...我想从右侧读取4个字符。

解决方案

试试这个

  string  input =   samplestring; 
  var  str = input.Substring（input.Length  -   4 ， 4 ）; 
  string  output =  ; 
  for （ int  i = str.Length -1; i >  =  0 ; i--）
 output + = str [i] .ToString（）; 
 
  //  输出将为gnir  

1. 反转字符串
2. 从左侧获取想要的字符

请参阅 c＃ - 反转字符串的最佳方法 - Stack Overflow [ ^ ]。

您的示例代码甚至不会编译，更不用说运行了，因此很难看出您是如何设法获得任何结果的。正确的代码如下：

  string  foo =   samplestring; 
  string  bar = foo.Substring（foo.Length  -   4 ， 4 ）; 
 Console.WriteLine（ 子字符串：{0}，bar）; 

Hi,

how to read characters from right side in string............


Please suggest

What I have tried:

string="samplestring";
string.Substring(string.Length - 4, 4);

it gives the result, but from left side... i want to read 4 characters from right side.

解决方案

try this

string input = "samplestring";
          var str = input.Substring(input.Length - 4, 4);
          string output = "";
          for (int i = str.Length -1; i >= 0; i--)
              output += str[i].ToString();

// output will be gnir

1. Reverse the string
2. Take the wanted characters from the left

See c# - Best way to reverse a string - Stack Overflow[^].

Your sample code will not even compile, let alone run, so it is difficult to see how you manage to get any result. The correct code would be something like:

string foo ="samplestring";
string bar = foo.Substring(foo.Length - 4, 4);
Console.WriteLine("Substring: {0}", bar);

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