How do I use regex in C# to match Chinese characters without also matching Japanese kana?

Question

In C#, \\p{Han} matches both Chinese characters and Japanese hiragana and katakana. I want to distinguish between them, so what do I do? Turn each char into unicode then detect whether the character is in the range?

Answer 1

//For chinese chars
public bool IsChinese(string text)
{
    return text.Any(c => c >= 0x20000 && c <= 0xFA2D);
}

//For japanese chars
private static IEnumerable<char> GetCharsInRange(string text, int min, int max)
{
    return text.Where(e => e >= min && e <= max);
}

Usage:

var romaji = GetCharsInRange(searchKeyword, 0x0020, 0x007E);
var hiragana = GetCharsInRange(searchKeyword, 0x3040, 0x309F);
var katakana = GetCharsInRange(searchKeyword, 0x30A0, 0x30FF);
var kanji = GetCharsInRange(searchKeyword, 0x4E00, 0x9FBF);