convert byte[] to string and way around

[Wilfried Mestdagh]

Hi,

how to typecast or convert a byte[] to a string and the way arount ?
I have string from a textbox and wants to transmit it trough a socket. witch
accepts a byte[]. Now I make a copy from the string first, but I'm sure there
is some other way. For receiving I have to display the received string into
a textbox. same question ?

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rgds, Wilfried
http://www.mestdagh.biz

[Jeti [work]]

> how to typecast or convert a byte[] to a string and the way arount ?

I have string from a textbox and wants to transmit it trough a socket. witch accepts a byte[]. Now I make a copy from the string first, but I'm sure there is some other way. For receiving I have to display the received string into a textbox. same question ?

Check out this class: "BitConverter"


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Je**@programeri.org
http://www.programeri.org
http://forum.programeri.org

[Denny Britz]

Hi,

string s = System.Text.Encoding.UTF8.GetString(bytes);
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(s);

Hi,

how to typecast or convert a byte[] to a string and the way arount ?
I have string from a textbox and wants to transmit it trough a socket. witch
accepts a byte[]. Now I make a copy from the string first, but I'm sure there
is some other way. For receiving I have to display the received string into
a textbox. same question ?

[Cor Ligthert]

Wilfried,

Normally is this the class for what you ask.
http://msdn.microsoft.com/library/de...classtopic.asp

I hope this helps,

Cor

[Wilfried Mestdagh]

Hi,

thank it is workinbut followig proble ifr receiving data:

private void DoDataAvailable(byte[] buffer, int offset, int count)

how to convert this to string ? offset is offset begin of string, and count
is amountof data.

[Jon Skeet [C# MVP]]

Wilfried Mestdagh <Wi**************@discussions.microsoft.com> wrote:

thank it is workinbut followig proble ifr receiving data:

private void DoDataAvailable(byte[] buffer, int offset, int count)

how to convert this to string ? offset is offset begin of string, and count
is amountof data.

Denny already showed you the code - use Encoding.GetString.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Wilfried Mestdagh]

Hi Jon,

Sorr I was not clear in this question. I have a pointer to a buffer with
offset in ti where data start, and count of data. To convert to string now I
need to make a double copy whitch should not be. I show because it will
explain better:

private void DoDataAvailable(byte[] buffer, int offset, int count)
{
count -= 2; // remove \r\n
byte[] tmp = new byte[count];
while (--count >= 0)
tmp[count] = buffer[offset + count];
string rx = Encoding.UTF8.GetString(tmp);

I wanted to avoid the extra copy of the data in tmp here.

thx, Wilfried

[Jon Skeet [C# MVP]]

Wilfried Mestdagh <Wi**************@discussions.microsoft.com> wrote:

Sorr I was not clear in this question. I have a pointer to a buffer with
offset in ti where data start, and count of data. To convert to string now I
need to make a double copy whitch should not be. I show because it will
explain better:

private void DoDataAvailable(byte[] buffer, int offset, int count)
{
count -= 2; // remove \r\n
byte[] tmp = new byte[count];
while (--count >= 0)
tmp[count] = buffer[offset + count];
string rx = Encoding.UTF8.GetString(tmp);

I wanted to avoid the extra copy of the data in tmp here.

Use the overload of Encoding.GetString which takes a start index and a
count.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too