4byte - value to string (like IPAddress.ToString())

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ohmmega - 25 Jul 2007 09:43 GMT

hello,

i've a 4 character string stored in a 4byte value (lets say an 32 bit
integer).
the integer holds the value:
char[3]*255^3+char[2]*255^2+char[1]*255^1+char[0]*255^0.

how can i convert this integer back to string?

thx
rené

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Jon Skeet [C# MVP] - 25 Jul 2007 09:45 GMT

> i've a 4 character string stored in a 4byte value (lets say an 32 bit
> integer).
> the integer holds the value:
> char[3]*255^3+char[2]*255^2+char[1]*255^1+char[0]*255^0.
>
> how can i convert this integer back to string?

You should be *very* clear about the differences between characters
and bytes. In .NET, each char is represented as *two* bytes (a UTF-16
code point).

Now, if you mean you've got an integer that you want to be converted
into a byte array and then treated as ASCII text, you can use
BitConverter to go from the integer to a byte array, then
Encoding.ASCII to go from the byte array to text.

Jon

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ohmmega - 25 Jul 2007 10:55 GMT

> You should be *very* clear about the differences between characters
> and bytes. In .NET, each char is represented as *two* bytes (a UTF-16
[quoted text clipped - 6 lines]
>
> Jon

usually i'm aware about the difference - anyway thank's for the
casting conclusion.
so: yes, i meant ASCII text and i've made a small method for my prob:
<code>
private string IntToString(int intVal)
{
byte[] bVal = BitConverter.GetBytes(intVal);
System.Text.ASCIIEncoding asciiEncoding = new
System.Text.ASCIIEncoding();
return asciiEncoding.GetString(bVal);
}
</code>

work's great - thank's for the thought-provoking impulse :)

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Jon Skeet [C# MVP] - 25 Jul 2007 10:59 GMT

<snip>

> so: yes, i meant ASCII text and i've made a small method for my prob:
> <code>
[quoted text clipped - 8 lines]
>
> work's great - thank's for the thought-provoking impulse :)

One thing you might want to change - there's no need to create a new
ASCIIEncoding each time. Just use:

return Encoding.ASCII.GetString(bVal);

Jon

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ohmmega - 25 Jul 2007 14:07 GMT

> <snip>
>
[quoted text clipped - 17 lines]
>
> Jon

oops :)

that's really fine
thx

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4byte - value to string (like IPAddress.ToString())

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