如何拆分字符串并在C＃中选择一个单词 [英] How to split string and pick a single word in C#

问题描述

你好我想拆分我的字符串并想在我的程序中只显示一个单词

假设这是我的字符串

  string   value  =   P 2016 -10-17，P 2016-10-18，P 2016-10-19，P 2016-10-20，P 2016-10-21; 

和拆分之后我已收到（P 2016-10-17）字符串中的每一个我想只显示P并希望隐藏字符串中的日期



我尝试过：

  string   value  =   P 2016- 10-17，P 2016-10-18，P 2016-10-19，P 2016-10-20，P 2016-10-21; 
  char  [] delimiters =  new   char  [] {' ，'}; 
  string  [] parts =  value  .Split（delimiters，StringSplitOptions.RemoveEmptyEntries）; 

i使用上面的代码拆分它们成功完成拆分但我想在字符串

解决方案

<上显示p blockquote>有两种方法可以做到这一点。

第一种方法是将字符串拆分两次：

  string   value  =   P 2016-10-17，P 2016-10-18，P 2016-10-19，P 2016-10-20，P 2016-10-21; 
  string  [] parts =  value  .Split（' ，'）; 
  foreach （ string  part  in 部分）
 {
  string  [] subParts = part.Split（' '）; 
  if （subParts.Length >   0 ）Console.WriteLine（subParts [ 0 ]）; 
} 

第二种是使用正则表达式：

  string   value  =   P 2016-10-17，P 2016-10-18，P 2016-10-19，P 2016-10-20，P 2016-10-21; 
 MatchCollection matches = Regex.Matches（ value ， @ （小于= ^ |，？）（小于？？前缀> +）（？= \s））; 
  foreach （匹配m  匹配）
 {
控制台。的WriteLine（m.Value）; 
} 

正则表达式有点复杂，但更灵活！

使用SubString和IndexOf，如下所示。



string newString = parts [0] .ToString（）。Substring（0，parts [0] .ToString（）。Length - 11）;



您可以整理更精细的细节。

您可以使用 Substring（）要做到这一点

以下内容应该有所帮助 -

  for （< span class =code-keyword> int  i =  0 ; i< parts.Length; i ++）
 {
 Console .WriteLine（  {0}，parts [i] .Substring（ 0 ，input.Length-11））;  //   11个字符用于排除日期和一个空格 
  //  您可以创建另一个数组来存储这些值 
} 

希望，它有帮助：）

hello i want to split my string and want to show only a single word in my program
suppose this is my string

string value = "P 2016-10-17,P 2016-10-18,P 2016-10-19,P 2016-10-20,P 2016-10-21";

and after split them i have received (P 2016-10-17) for each in the string here i want to just display only P and want to hide date in the string

What I have tried:

string value = "P 2016-10-17,P 2016-10-18,P 2016-10-19,P 2016-10-20,P 2016-10-21";
          char[] delimiters = new char[] { ',' };
          string[] parts = value.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);

i have use above code for split them the split is successfully done but i want to display on p from the string

解决方案

There are two ways to do this.
The first is to split the string twice:

string value = "P 2016-10-17,P 2016-10-18,P 2016-10-19,P 2016-10-20,P 2016-10-21";
string[] parts = value.Split(',');
foreach (string part in parts)
    {
    string[] subParts = part.Split(' ');
    if (subParts.Length > 0) Console.WriteLine(subParts[0]);
    }

The second is to use a regex:

string value = "P 2016-10-17,P 2016-10-18,P 2016-10-19,P 2016-10-20,P 2016-10-21";
MatchCollection matches = Regex.Matches(value, @"(?<=^|,)(?<Prefix>.+?)(?=\s)");
foreach (Match m in matches)
    {
    Console.WriteLine(m.Value);
    }

The regex is a little more complex, but a lot more flexible!

Make use of SubString and IndexOf as shown below.

string newString = parts[0].ToString().Substring(0, parts[0].ToString().Length - 11);

You can sort out the finer details.

You can use Substring() to do that
Something like following should help-

for(int i=0;i< parts.Length;i++)
      {              
              Console.WriteLine("{0}",parts[i].Substring(0, input.Length-11)); // 11 characters to exclude the date and one whitespace in between
              //you can create another array to store these values now
      }

Hope, it helps :)

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