How to convert a non-seekable Stream to Byte Array?

[Hardy Wang]

Hi all:
The Stream object from WebRequest.GetR esponseStream() is non-seekable.
How can I convert this stream to a byte array?

For ordinary Stream (seekable), I can use StreamObject.Re ad(myByteArray,
0, myLength)

--

WWW: http://hardywang.1accesshost.com
ICQ: 3359839
yours Hardy

[Aravind C]

Hi Hardy,

Since the response stream from a web request is a network stream
that does not provide random access (non-seekable), you will need to
copy the response stream to a seekable stream such as a MemoryStream
before you can perform seek operations:

Stream responseStream = webResponse.Get ResponseStream( );
MemoryStream memStream = new MemoryStream();

byte [] respBuffer = new byte[1024];
try
{
int bytesRead = responseStream. Read(respbuffer ,0,
respBuffer.Leng th);
if(bytesRead > 0)
{
memStream.Write (respBuffer,0,b ytesRead);
bytesRead = responseStream. Read(respBuffer ,0,
respBuffer.Leng th);
}
}
finally
{
responseStream. Close();
webResponse.Clo se();
}

To get the array containing the byte data from the MemoryStream, use the
MemoryStream.Ge tBuffer() method.

Regards,
Aravind C
"Hardy Wang" <ha********@mar ketrend.com> wrote in message
news:uX******** ******@TK2MSFTN GP09.phx.gbl...

Hi all:
The Stream object from WebRequest.GetR esponseStream() is non-seekable.
How can I convert this stream to a byte array?

For ordinary Stream (seekable), I can use StreamObject.Re ad(myByteArray, 0, myLength)

--

WWW: http://hardywang.1accesshost.com
ICQ: 3359839
yours Hardy

[Jon Skeet [C# MVP]]

Hardy Wang <ha********@mar ketrend.com> wrote:

The Stream object from WebRequest.GetR esponseStream() is non-seekable.
How can I convert this stream to a byte array?

For ordinary Stream (seekable), I can use StreamObject.Re ad(myByteArray,
0, myLength)

You can use that with a non-seekable request too. However, in both
cases you shouldn't ignore the return value - it may well be that you
can't read the whole of the data in one chunk. You should loop until
either you've read everything you need to or you've got to the end of
the stream (where Read will return -1).

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

[Hardy Wang]

I tried responseStream. Read(respbuffer ,0, respBuffer.Leng th);

At this point an exception was thrown.

"Aravind C" <ar***********@ nospam.hotmail. com> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

Hi Hardy,

Since the response stream from a web request is a network stream
that does not provide random access (non-seekable), you will need to
copy the response stream to a seekable stream such as a MemoryStream
before you can perform seek operations:

Stream responseStream = webResponse.Get ResponseStream( );
MemoryStream memStream = new MemoryStream();

byte [] respBuffer = new byte[1024];
try
{
int bytesRead = responseStream. Read(respbuffer ,0,
respBuffer.Leng th);
if(bytesRead > 0)
{
memStream.Write (respBuffer,0,b ytesRead);
bytesRead = responseStream. Read(respBuffer ,0,
respBuffer.Leng th);
}
}
finally
{
responseStream. Close();
webResponse.Clo se();
}

To get the array containing the byte data from the MemoryStream, use the
MemoryStream.Ge tBuffer() method.

Regards,
Aravind C
"Hardy Wang" <ha********@mar ketrend.com> wrote in message
news:uX******** ******@TK2MSFTN GP09.phx.gbl...

Hi all:
The Stream object from WebRequest.GetR esponseStream() is non-seekable. How can I convert this stream to a byte array?

For ordinary Stream (seekable), I can use

StreamObject.Re ad(myByteArray,

0, myLength)

--

WWW: http://hardywang.1accesshost.com
ICQ: 3359839
yours Hardy

[Jon Skeet [C# MVP]]

Hardy Wang <ha********@mar ketrend.com> wrote:

I tried responseStream. Read(respbuffer ,0, respBuffer.Leng th);

At this point an exception was thrown.

And what was the exception?

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

[Hardy Wang]

Just like something "the stream is not seakable"
"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

Hardy Wang <ha********@mar ketrend.com> wrote:

I tried responseStream. Read(respbuffer ,0, respBuffer.Leng th);

At this point an exception was thrown.

And what was the exception?

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

[Jon Skeet [C# MVP]]

Hardy Wang <ha********@mar ketrend.com> wrote:

Just like something "the stream is not seakable"

"Something like" doesn't help much. Could you post a short but
*complete* sample which demonstrates the problem? There should be no
problem just reading from the stream, if you're not actually *trying*
to seek.

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