How do you get the number of bytes in a string

[george r smith]

Greetings,

What is the C# code that returns the number of bytes in a string such as

323131313531313 33432317E547E31 32357E5553447E4 67E353636303130 303034383532363 2
7E307E56

It should be 80 I think.
thanks
grs

[Morten Wennevik]

Well, there is nothing that would return the number of bytes, but
String.Length would return the number of characters.
A char would be unicode, which is 16 bits, so the string would be at least
160 bytes (actually I counted 83 characters, so 166+ bytes)
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[george r smith]

Morten,
thanks
I was afraid of that I would like a "sizeof".

The packet.length return 162, so I guess we subtract 2 for the 'x0' end of
string giving 160 and 160 / 2 gives us 80 bytes which is what the specs say
the number of bytes is.

Does this seem correct.
grs

"Morten Wennevik" <Mo************ @hotmail.com> wrote in message
news:op******** ******@msnews.m icrosoft.com...

Well, there is nothing that would return the number of bytes, but
String.Length would return the number of characters.
A char would be unicode, which is 16 bits, so the string would be at least
160 bytes (actually I counted 83 characters, so 166+ bytes)
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to the news group.

[Morten Wennevik]

There is a sizeof operator but I think that would only show you the
class/structure size.
sizeof(String);
Also, sizeof only works with the 'unsafe' code blocks.
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[Jon Skeet [C# MVP]]

george r smith <gs****@budgete xt.com> wrote:

What is the C# code that returns the number of bytes in a string

There's no such thing as the number of bytes in a string. There's the
number of bytes in an encoded version of a string, or the number of
characters in a string.

What are you really trying to measure?

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[Daniel Jin]

even in unsafe mode, you cannot take the sizeof of a reference type. it only works with value types

----- Morten Wennevik wrote: ----

There is a sizeof operator but I think that would only show you the
class/structure size
sizeof(String)
Also, sizeof only works with the 'unsafe' code blocks
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to the news group

[george r smith]

Jon,

In our first project with c# (we used to use Delphi) I have a spec that
calls for the total number of bytes of a socket transaction bo be inserted
into a field.

I also have to round up a section of the packet that is to be encrypted to a
multiple of 16 bytes so I will need know the number of bytes there.

I have been watching this newsgroup so I know I will get the answer from you
:).

thanks
grs
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

george r smith <gs****@budgete xt.com> wrote:

What is the C# code that returns the number of bytes in a string

There's no such thing as the number of bytes in a string. There's the
number of bytes in an encoded version of a string, or the number of
characters in a string.

What are you really trying to measure?

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

[test account]

string value =
"32313131353131 333432317E547E3 132357E5553447E 467E35363630313 030303438353236 3
27E307E56";
byte[] data = System.Text.Enc oding.GetBytes( value);
int length = data.Length;

????

"george r smith" <gs****@budgete xt.com> wrote in message
news:ey******** ******@TK2MSFTN GP10.phx.gbl...

Greetings,

What is the C# code that returns the number of bytes in a string such as

323131313531313 33432317E547E31 32357E5553447E4 67E353636303130 303034383532363 2 7E307E56

It should be 80 I think.
thanks
grs

[Jon Skeet [C# MVP]]

george r smith <gs****@budgete xt.com> wrote:

In our first project with c# (we used to use Delphi) I have a spec that
calls for the total number of bytes of a socket transaction bo be inserted
into a field.

I also have to round up a section of the packet that is to be encrypted to a
multiple of 16 bytes so I will need know the number of bytes there.

I have been watching this newsgroup so I know I will get the answer from you
:).

So you're transmitting the string in this packet, yes? If so, what
encoding are you using? (Given that it does need to be encoded into
bytes.) If you know the encoding, just convert the string into a byte
array using that encoding and find the length of the array. (You'll
need to convert it into the array anyway in order to send it,
probably.)

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[Jon Skeet [C# MVP]]

test account <bi**********@h ax0r.dyndns.org > wrote:

string value =
"32313131353131 333432317E547E3 132357E5553447E 467E35363630313 030303438353236 3
27E307E56";
byte[] data = System.Text.Enc oding.GetBytes( value);
int length = data.Length;

????

That won't work quite as you've posted it because you need to say
*which* encoding to use - Encoding.GetByt es is an instance method, not
a static method.

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If replying to the group, please do not mail me too