c# 中是否有类似 java 的 Character.digit(char ch, int radix) 之类的东西？

Question

Character.digit(char ch, int radix)

Returns the numeric value of the character ch in the specified radix.

Is there an equivalent function in c#?

Answer 1

I don't know of a direct equivalent
The closest match I can find is

Convert.ToInt32(string s, int baseFrom);  

So you could convert your char to string then pass it in to the above function to get the int32 or Int16 or Byte or however you want to handle it :

char c = 'F';

int digit = Convert.ToInt32(c.ToString(),16);

Note - Convert will throw a FormatException if the char isn't a digit

Answer 2

If you work with hex characters you can do:

if (System.Uri.IsHexDigit(c)) {
  int v = System.Uri.FromHex(c);
}