first bytes of a string

[Dirk Reske]

Hello,

how do I get the first e.g. 4 bytes of a string into a byte array?

thx

 

[Nicholas Paldino [.NET/C# MVP]]

Dirk,

You can get the bytes from a string by calling the GetBytes method on
the encoding. If you want the bytes as represented in ASCII, you can do the
following:

// The byte array to encode into.
byte[] pbytBytes = new byte[4];

// Get the bytes in a string.
Encoding.ASCII.GetBytes("what is this",
0, // The character in the string to encode from.
4, // The number of characters to encode.
pbytBytes, // The byte array to encode into.
0 // The index in the byte array to begin writing to
);

Hope this helps.

 

[Jochen Kalmbach]

how do I get the first e.g. 4 bytes of a string into a byte array?

Strings are NOT stored as bytes! Strings are stored as chars. So to convert
to byte you need a an encoder (like ASCII).


--
Greetings
Jochen

Do you need a memory-leak finder ?
http://www.codeproject.com/tools/leakfinder.asp

Do you need daily reports from your server?
http://sourceforge.net/projects/srvreport/

 

[Jon Skeet [C# MVP]]

how do I get the first e.g. 4 bytes of a string into a byte array?

Do you mean bytes, or do you mean characters? If you mean characters,
you could take a substring and then copy it to a char array:

char[] c = myString.Substring(0, 4).ToCharArray();