I have a simple question which, surprisingly a google search nor MSDN
can help me with. What is the best stream to use to parse a string,
character by character. All the streams return Int32, but I cannot find
a way to convert the Int32 to a character value. For instance,
StringReader.Read("1") returns 49, the Unicode character code. How do I
convert this unicode code to its value '1'?

Also, off the main question, but here are a couple more:

1) Why doesn't StringReader take an Encoding?
2) If StringReader does not take an Encoding, how does it actually work?
3) If String has a Trim function, why isn't there an
Encoding.xxx.IsSpace(Int32 ch)?

thanks very much in advance

you can try with a StreamReader and an Encoding of 'utf-32' (code page
12000).


/LM

"John" <(E-Mail Removed)> wrote in message
news:eRLNJ%(E-Mail Removed)...
>I have a simple question which, surprisingly a google search nor MSDN can
>help me with. What is the best stream to use to parse a string, character
>by character. All the streams return Int32, but I cannot find a way to
>convert the Int32 to a character value. For instance,
>StringReader.Read("1") returns 49, the Unicode character code. How do I
>convert this unicode code to its value '1'?
>
> Also, off the main question, but here are a couple more:
>
> 1) Why doesn't StringReader take an Encoding?
> 2) If StringReader does not take an Encoding, how does it actually work?
> 3) If String has a Trim function, why isn't there an
> Encoding.xxx.IsSpace(Int32 ch)?
>
> thanks very much in advance

Peter Duniho wrote:
> Why not just enumerate all the characters in the string? For example:
>
> string strInput = "my string";
>
> foreach (char chInput in strInput)
> {
> // do something with each character
> }
>
> Is there some specific reason you want to use StringReader?

Well, the code uses a system of building token types and objects out of
the string. I am porting some C++ code that uses putback on the stream
during the processing which can be converted to Peek(). Your suggestion
is valid but I'm not sure it's going to work.

> Second, the Encoding class has _no_ methods of that nature. Why would
> you expect to find an IsSpace() method in the Encoding class, when there
> aren't any methods to classify characters?
>
> You can, of course, call Char.IsWhiteSpace() on characters once you've
> got a valid UTF-16 character to look at.
>

Of course, the Char class, how did I miss that, thanks very much.

Sound advice as usual Peter.