In C#, how can I detect if a character is a non-ASCII character?

问题

I would like to check, in C#, if a char contains a non-ASCII character. What is the best way to check for special characters such as 志 or Ω?

回答1:

ASCII ranges from 0 - 127, so just check for that range:

char c = 'a';//or whatever char you have
bool isAscii = c < 128;

回答2:

    bool HasNonASCIIChars(string str)
    {
        return (System.Text.Encoding.UTF8.GetByteCount(str) != str.Length);
    }

来源：https://stackoverflow.com/questions/18596245/in-c-how-can-i-detect-if-a-character-is-a-non-ascii-character