convert string character to ascii in delphi

Question

How can i convert string character (123-jhk25) to ASCII in Delphi7

the string '(123-jhk25)' in Delphi 7 containes only ASCII characters. No conversion required. — kludg
– kludg, Commented Feb 21, 2010 at 15:05

Gerry Coll · Accepted Answer · 2010-02-22 20:34:05Z

4

If you mean the ASCII code for the character you need to use the Ord() function which returns the Ordinal value of any "enumerable" type

In this case it works on character values, returning a byte:

var
  Asc : Byte;
  i : Integer;
begin
  for i := 1 to Length(s) do
  begin
    Asc := Ord(s[i]);
    // do something with Asc
  end;
end;

answered Feb 22, 2010 at 20:34

Gerry Coll

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1 Comment

AlainD Nov 7 at 12:56

Worth pointing out that Chr(X) returns the AnsiChar of that ordinal value i.e. Chr(A) = "A" and X = Ord(Chr(X)) (assuming "X" is in the range of ASCII characters).

Mason Wheeler · Accepted Answer · 2010-02-21 13:32:37Z

2

It depends on your Delphi version. In Delphi 2007 and before, strings are automatically in ANSI string format, and anything below 128 is an ASCII character.

In D2009 and later, things become more complicated since the default string type is UnicodeString. You'll have to cast the character to AnsiChar. It'll perform a codepage conversion, and then whatever you end up with may or may not work depending on which language the character in question came from. But if it was originally an ASCII character, it should convert without trouble.

answered Feb 21, 2010 at 13:32

Mason Wheeler

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