Example of how regular expressions in C# validate Chinese characters

This article introduces you to the method of using C# regular expressions to verify Chinese characters through example code. Friends who need it can refer to it.

No more nonsense, I will directly post the code for you. The details The code looks like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace 正则表达01
{
  /// <summary>
  /// 表达是否是字符是不是中文
  /// </summary>
  class Program
  {
    /// <summary>
    /// 在 ASCII码表中，英文的范围是0-127，而汉字则是大于127
    /// </summary>
    static void justice1() {
      string text = "adonai,天下英雄出我辈，一入江湖岁月催。鸿图霸业谈笑间，不胜人生一场醉。 提剑跨骑挥鬼雨，白骨如山鸟惊飞。 尘世如潮人如水，只叹江湖几人回";
      for (int i = 0; i < text.Length; i++)
      {
        if ((int)text[i] > 127)
          Console.WriteLine("是汉字");
        else
          Console.WriteLine("不是汉字");
      }
    }
    /// <summary>
    /// 汉字的UNICODE编码范围是4e00-9fbb
    /// </summary>
    static void justice2() {
      string text = "adonai,天下英雄出我辈，一入江湖岁月催。鸿图霸业谈笑间，不胜人生一场醉。 提剑跨骑挥鬼雨，白骨如山鸟惊飞。 尘世如潮人如水，只叹江湖几人回";
      char[] c = text.ToCharArray();
      for (int i = 0; i < c.Length; i++)
        if (c[i] >= 0x4e00 && c[i] <= 0x9fbb)
          Console.WriteLine("是汉字");
        else
          Console.WriteLine("不是汉字");
    }
    /// <summary>
    /// 正则表达式判断也是用汉字的 UNICODE 编码范围
    /// </summary>
    static void justice3() {
      string text = "adonai,天下英雄出我辈，一入江湖岁月催。鸿图霸业谈笑间，不胜人生一场醉。 提剑跨骑挥鬼雨，白骨如山鸟惊飞。 尘世如潮人如水，只叹江湖几人回";
    for (int i = 0; i < text.Length; i++)
    {
        if (Regex.IsMatch(text[i].ToString(), @"[\u4e00-\u9fbb]"))
          Console.WriteLine("是汉字");
        else
          Console.WriteLine("不是汉字");
    }
    }
    static void Main(string[] args)
    {
      justice1();
      Console.ReadKey();
    }
  }
}

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