在C＃中Char.IsDigit（）和Char.IsNumber（）之间的区别 [英] Difference between Char.IsDigit() and Char.IsNumber() in C#

问题描述

什么的区别 Char.IsDigit（）和 Char.IsNumber（）在C＃？

推荐答案

Char.IsDigit（）是的一个子集Char.IsNumber（） 。

某些0x00b2和0x00b3它们上标2和3（'²'和'³'）和那些馏分如'¼'，'半'的字形是'数字'而不是数字包含字符，和¾。

Some of the characters that are 'numeric' but not digits include 0x00b2 and 0x00b3 which are superscripted 2 and 3 ('²' and '³') and the glyphs that are fractions such as '¼', '½', and '¾'.

请注意，有相当多的字符 ISDIGIT（）返回真对于不在ASCII范围的0x30至0x39，如这些泰数字字符：0123456'7''8''9'

Note that there are quite a few characters that IsDigit() returns true for that are not in the ASCII range of 0x30 to 0x39, such as these Thai digit characters: '๐' '๑' '๒' '๓' '๔' '๕' '๖' '๗' '๘' '๙'.

的code这个片段告诉你哪个code点不同：

This snippet of code tells you which code points differ:

static private void test()
{
    for (int i = 0; i <= 0xffff; ++i)
    {
        char c = (char) i;

        if (Char.IsDigit( c) != Char.IsNumber( c)) {
            Console.WriteLine( "Char value {0:x} IsDigit() = {1}, IsNumber() = {2}", i, Char.IsDigit( c), Char.IsNumber( c));
        }
    }
}

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