UCS and BMP Character Sets

[Jeffrey Walton]

HI All,

I' working on an ASN.1 parser. The Content Octets (data values) are
stored in a byte[]. The conversion of byte[] to char[] is fairly
trivial. BMP is a special case of UCS, using the lower 65 thousand
characters. Reference http://en.wikipedia.org/wiki/Univers..._Character_Set

How do I specify a character set of UCS (ISO/IEC 10646) when invoking
a string constructor?

Thanks,
Jeff
Jeffrey Walton

[Jon Skeet [C# MVP]]

Jeffrey Walton <no******@gmail .comwrote:

I' working on an ASN.1 parser. The Content Octets (data values) are
stored in a byte[]. The conversion of byte[] to char[] is fairly
trivial. BMP is a special case of UCS, using the lower 65 thousand
characters.

<snip>

How do I specify a character set of UCS (ISO/IEC 10646) when invoking
a string constructor?

You don't build a string from bytes, you build it from Unicode
characters (or UTF-16 code points really).

You want to use System.Text.Enc oding.GetString (byte[]) to convert from
bytes to a string.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
World class .NET training in the UK: http://iterativetraining.co.uk

[Jeffrey Walton]

Hi John,

Thanks for the quick reply.

You don't build a string from bytes, you build it from Unicode
characters (or UTF-16 code points really).

I know I am off slightly with respect to the paradigm.

You want to use System.Text.Enc oding.GetString (byte[]) to convert from
bytes to a string.

Thank you very much. I was cruising your site earlier. The example
presented is based on a Stream (but I have a byte array). I was hoping
for a more applicable answer.

I also saw a T.61 string is availble as a CodePage (http://
msdn2.microsoft .com/en-us/library/system.text.enc odinginfo.aspx) . How
does on set it in C# (or is there an overload in
System.Text.Enc oding.GetString () which uses it?).
Thanks Again,
Jeff

On Nov 20, 2:21 pm, Jon Skeet [C# MVP] <[e-mail] mwrote:

Jeffrey Walton <noloa...@gmail .comwrote:

I' working on an ASN.1 parser. The Content Octets (data values) are
stored in a byte[]. The conversion of byte[] to char[] is fairly
trivial. BMP is a special case of UCS, using the lower 65 thousand
characters.

<snip>

How do I specify a character set of UCS (ISO/IEC 10646) when invoking
a string constructor?

You don't build a string from bytes, you build it from Unicode
characters (or UTF-16 code points really).

You want to use System.Text.Enc oding.GetString (byte[]) to convert from
bytes to a string.

--
Jon Skeet - <[e-mail] m>http://www.pobox.com/~skeet Blog:http://www.msmvps.com/jon.skeet
World class .NET training in the UK:http://iterativetraining.co.uk

[Jon Skeet [C# MVP]]

Jeffrey Walton <no******@gmail .comwrote:

You don't build a string from bytes, you build it from Unicode
characters (or UTF-16 code points really).

I know I am off slightly with respect to the paradigm.

You want to use System.Text.Enc oding.GetString (byte[]) to convert from
bytes to a string.

Thank you very much. I was cruising your site earlier. The example
presented is based on a Stream (but I have a byte array). I was hoping
for a more applicable answer.

Okay, to load a string from a Stream, you use a StreamReader with a
suitable Encoding.

I also saw a T.61 string is availble as a CodePage (http://
msdn2.microsoft .com/en-us/library/system.text.enc odinginfo.aspx) . How
does on set it in C# (or is there an overload in
System.Text.Enc oding.GetString () which uses it?).

You can supply a code page to Encoding.GetEnc oding.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
World class .NET training in the UK: http://iterativetraining.co.uk