Char.IsHex（）在C＃ [英] Char.IsHex() in C#

问题描述

从<一个继href="http://stackoverflow.com/questions/223832/check-a-string-to-see-if-all-characters-are-hexadecimal-values">this问题什么是写在C＃中Char.IsHex（）函数的最佳方式。到目前为止，我已经得到了这一点，但不喜欢它：

 布尔CharIsHex（字符C）{
    C = Char.ToLower（C）;
    返程（Char.IsDigit（三）||ç=='一'||ç=='B'||ç=='C'||ç=='D'||ç=='E'|| ç=='F'）
}
 

解决方案

从<一个href="http://stackoverflow.com/questions/223832/check-a-string-to-see-if-all-characters-are-hexadecimal-values#223854">my回答为您链接到的问题：

 布尔is_hex_char =（C＆GT; ='0'和;和C＆LT; ='9'）||
                   （C＆GT; ='A'和;和C＆LT; ='F'）||
                   （C＆GT; ='A'和;和C＆LT; ='F'）;
 

Following on from this question what would be the best way to write a Char.IsHex() function in C#. So far I've got this but don't like it:

bool CharIsHex(char c) {
    c = Char.ToLower(c);
    return (Char.IsDigit(c) || c == 'a' || c == 'b' || c == 'c' || c == 'd' || c == 'e' || c == 'f')
}

解决方案

From my answer to the question you linked to:

bool is_hex_char = (c >= '0' && c <= '9') ||
                   (c >= 'a' && c <= 'f') ||
                   (c >= 'A' && c <= 'F');

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