C# 读取具有特定格式的字符串

我有一些字符串，比如

string text = 
  "these all are strings, 000_00_0 and more strings are there I have here 649_17_8, and more with this format 975_63_7."

所以这里我只想读

000\u 00\u 0

，

649\u 17\u 8

，

975\u 64\u 7

。。。使用此格式的所有字符串

---

请帮助我了解情况

您可以使用

Regex

类及其匹配方法

var matches = System.Text.RegularExpressions.Regex.Matches(input, "([_0-9]+)");

var numberishs1 = matches
        .Select(m => m.Groups[1].ToString())
        .ToList();

var s1 = string.Join(", ", numberishs1);

---

你必须使用正则表达式

在您的例子中，您希望找到模式

“…。。。。。

如果你只想要数字，它将是模式

“（[0-9]{3}{[0-9]{2}{[0-9]{1}）”

试试这个：

using System;
using System.Text.RegularExpressions;

namespace SyntaxTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var input =
                "these all are strings, 000_00_0 and more strings are there I have here 649_17_8, and more with this format 975_63_7.";
            var pattern = "..._.._.";

            Match result = Regex.Match(input, pattern);
            if (result.Success)
            {
                while (result.Success)
                {
                    Console.WriteLine("Match: {0}", result.Value);
                    result = result.NextMatch();
                }

                Console.ReadLine();
            }
        }
    }
}

---

似乎是正则表达式的工作…模式：（[0-9]{3}{[0-9]{2}{[0-9]{1}）可能

[0-9]+（[0-9]+）*

将是一种更安全的模式，因为

[\u0-9]+

无论何时出现都匹配单个

，例如在

中“仅某些文本”

using System;
using System.Text.RegularExpressions;

namespace SyntaxTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var input =
                "these all are strings, 000_00_0 and more strings are there I have here 649_17_8, and more with this format 975_63_7.";
            var pattern = "..._.._.";

            Match result = Regex.Match(input, pattern);
            if (result.Success)
            {
                while (result.Success)
                {
                    Console.WriteLine("Match: {0}", result.Value);
                    result = result.NextMatch();
                }

                Console.ReadLine();
            }
        }
    }
}