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

c# string unicode char ascii

26,900

Solution 1

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

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

Solution 2

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

26,900

Author by

Alexandru

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Updated on October 30, 2021

Comments

Alexandru over 2 years

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?
Jeppe Stig Nielsen over 10 years

And for those who want to be fancy, bool isAscii = c <= sbyte.MaxValue;.
Vesk almost 3 years

Now that's an interesting way to go about this. Really clever!