Converting characters in string to ascii

[Guest]

In C#, how would you loop through each character in a string and convert them
to their ascii values?

 

[Ollie Riches]

do you mean something like this:

static void Main(string[] args)
{
string test = "ollie";
foreach(char c in test)
{
Console.WriteLine((int)c);
}
Console.ReadLine();
}

HTH

Ollie Riches

 

[Morten Wennevik]

Hi Dan,

Use the Encoding class.

byte[] asciicharacters = Encoding.ASCII.GetBytes(unicodeString);

 

[Guest]

Dan,
string s = "qwerty";

foreach (char c in s)
{
}

All the best,
Phil.

 

[Guest]

This doesn't answer how to convert the character to its numeric ascii value.
While I'm at it, I'd also like to then convert the resulting number to its
hex equivalent.

 

[Christof Nordiek]

you can cast the char to int.
if the value is in the range of 0 to 127 it's the ascii value of the char;
if not it's not a ascii-character.

 

[Michael A. Covington]

This doesn't answer how to convert the character to its numeric ascii
Doesn't System.Encoding get involved here? The string might not be ASCII;
it might be Unicode.

Hex and decimal are not different kinds of numbers. They are different ways
of printing a number. Format strings (String.Format) with the appropriate
specifier can convert a number into the characters that represent it in
either decimal or hex.

 

[Jon Skeet [C# MVP]]

Use the Encoding class.

byte[] asciicharacters = Encoding.ASCII.GetBytes(unicodeString);

There's no need to in this case - all ASCII values are the same as in
Unicode, although of course there's much more of Unicode.

Just casting the character to an int will give you the Unicode value -
if it's in the ASCII range, the value will be the ASCII value.

 

[Jon Skeet [C# MVP]]

Doesn't System.Encoding get involved here?

No - or at least, it doesn't need to.

The string might not be ASCII; it might be Unicode.

*All* strings are Unicode.

All you've got to know is whether a number is above 127 or not, and
there's no need to get Encoding involved to do that