Uploading large files from an iPAQ

[Dan]

I'm trying to upload a large binary file from an iPAQ, but am getting
out-of-memory exceptions when I try to convert the byte array containing the
data to a string in order to include it in the StringBuilder object which
represents the http (multipart/form-data mimetype) request. The code I'm
using to read and convert the data is below, and the exception occurs in
ascii.GetString . The file is about 9mb, and I've got plenty of free memory
(according the system monitor in the iPAQ, I've got 38.64MB free storage,
and 61.85MB free program memory). Does anyone have any suggestions?
Thanks...Dan

try
{
fs = new FileStream(m_Fi leName, FileMode.Open, FileAccess.Read );
r = new BinaryReader(fs );
if (fs.Length > int.MaxValue)
throw new Exception("The ServletRequest library currently will not
upload files greater than " + int.MaxValue + " bytes. " + m_FileName + "
contains " + fs.Length + "
bytes.");
byte[] fileContent = r.ReadBytes((in t) fs.Length);
ASCIIEncoding ascii = new ASCIIEncoding() ;
return ascii.GetString (fileContent, 0, fileContent.Len gth);
}
catch (Exception e)
{
throw new Exception("Erro r retrieving filecontent from " + m_FileName,
e);
}

[Chris Tacke, eMVP]

CE's memory model doesn't allow you to use all the "free" memory you see for
heap allocations. Packetize the send.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:uC******** ******@TK2MSFTN GP15.phx.gbl...

I'm trying to upload a large binary file from an iPAQ, but am getting
out-of-memory exceptions when I try to convert the byte array containing the data to a string in order to include it in the StringBuilder object which
represents the http (multipart/form-data mimetype) request. The code I'm
using to read and convert the data is below, and the exception occurs in
ascii.GetString . The file is about 9mb, and I've got plenty of free memory (according the system monitor in the iPAQ, I've got 38.64MB free storage,
and 61.85MB free program memory). Does anyone have any suggestions?
Thanks...Dan

try
{
fs = new FileStream(m_Fi leName, FileMode.Open, FileAccess.Read );
r = new BinaryReader(fs );
if (fs.Length > int.MaxValue)
throw new Exception("The ServletRequest library currently will not
upload files greater than " + int.MaxValue + " bytes. " + m_FileName + "
contains " + fs.Length + "
bytes.");
byte[] fileContent = r.ReadBytes((in t) fs.Length);
ASCIIEncoding ascii = new ASCIIEncoding() ;
return ascii.GetString (fileContent, 0, fileContent.Len gth);
}
catch (Exception e)
{
throw new Exception("Erro r retrieving filecontent from " + m_FileName,
e);
}

[Dan]

Is there a way to find out how much memory you're allowed to use before
allocating it?

"Chris Tacke, eMVP" <ct****@spamfre e-opennetcf.org> wrote in message
news:O4******** ******@TK2MSFTN GP11.phx.gbl...

CE's memory model doesn't allow you to use all the "free" memory you see for heap allocations. Packetize the send.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:uC******** ******@TK2MSFTN GP15.phx.gbl...

I'm trying to upload a large binary file from an iPAQ, but am getting
out-of-memory exceptions when I try to convert the byte array containing

the

data to a string in order to include it in the StringBuilder object which represents the http (multipart/form-data mimetype) request. The code I'm using to read and convert the data is below, and the exception occurs in
ascii.GetString . The file is about 9mb, and I've got plenty of free

memory

(according the system monitor in the iPAQ, I've got 38.64MB free storage, and 61.85MB free program memory). Does anyone have any suggestions?
Thanks...Dan

try
{
fs = new FileStream(m_Fi leName, FileMode.Open, FileAccess.Read );
r = new BinaryReader(fs );
if (fs.Length > int.MaxValue)
throw new Exception("The ServletRequest library currently will not
upload files greater than " + int.MaxValue + " bytes. " + m_FileName + "
contains " + fs.Length + " bytes.");
byte[] fileContent = r.ReadBytes((in t) fs.Length);
ASCIIEncoding ascii = new ASCIIEncoding() ;
return ascii.GetString (fileContent, 0, fileContent.Len gth);
}
catch (Exception e)
{
throw new Exception("Erro r retrieving filecontent from " + m_FileName, e);
}

[Chris Tacke, eMVP]

Not really, and it's even harder here becasue the CF is abstracting the
actual allocation call. If it were me, I'd just chop it into packets around
1k and go that way. Heck, that even provides a progress hook for nice UI
interaction.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:u6******** ********@TK2MSF TNGP10.phx.gbl. ..

Is there a way to find out how much memory you're allowed to use before
allocating it?

"Chris Tacke, eMVP" <ct****@spamfre e-opennetcf.org> wrote in message
news:O4******** ******@TK2MSFTN GP11.phx.gbl...

CE's memory model doesn't allow you to use all the "free" memory you see for

heap allocations. Packetize the send.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:uC******** ******@TK2MSFTN GP15.phx.gbl...

I'm trying to upload a large binary file from an iPAQ, but am getting
out-of-memory exceptions when I try to convert the byte array containing

the

data to a string in order to include it in the StringBuilder object which represents the http (multipart/form-data mimetype) request. The code I'm using to read and convert the data is below, and the exception occurs

in ascii.GetString . The file is about 9mb, and I've got plenty of free

memory

(according the system monitor in the iPAQ, I've got 38.64MB free

storage, and 61.85MB free program memory). Does anyone have any suggestions?
Thanks...Dan

try
{
fs = new FileStream(m_Fi leName, FileMode.Open, FileAccess.Read );
r = new BinaryReader(fs );
if (fs.Length > int.MaxValue)
throw new Exception("The ServletRequest library currently will not upload files greater than " + int.MaxValue + " bytes. " + m_FileName + " contains " + fs.Length

+ " bytes.");
byte[] fileContent = r.ReadBytes((in t) fs.Length);
ASCIIEncoding ascii = new ASCIIEncoding() ;
return ascii.GetString (fileContent, 0, fileContent.Len gth);
}
catch (Exception e)
{
throw new Exception("Erro r retrieving filecontent from " + m_FileName, e);
}

[Dan]

Thanks Chris. BTW, do you know whether it's a good idea to flush the stream
as I'm writing the HTTP request? I'm worried that, if I don't, the buffer
might start getting big.

"Chris Tacke, eMVP" <ct****@spamfre e-opennetcf.org> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Not really, and it's even harder here becasue the CF is abstracting the
actual allocation call. If it were me, I'd just chop it into packets around 1k and go that way. Heck, that even provides a progress hook for nice UI
interaction.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:u6******** ********@TK2MSF TNGP10.phx.gbl. ..

Is there a way to find out how much memory you're allowed to use before
allocating it?

"Chris Tacke, eMVP" <ct****@spamfre e-opennetcf.org> wrote in message
news:O4******** ******@TK2MSFTN GP11.phx.gbl...

CE's memory model doesn't allow you to use all the "free" memory you see

for

heap allocations. Packetize the send.

-Chris
"Dan" <da*@dontspamme .com> wrote in message
news:uC******** ******@TK2MSFTN GP15.phx.gbl...
> I'm trying to upload a large binary file from an iPAQ, but am

getting > out-of-memory exceptions when I try to convert the byte array containing the
> data to a string in order to include it in the StringBuilder object which

> represents the http (multipart/form-data mimetype) request. The

code I'm

> using to read and convert the data is below, and the exception

occurs in > ascii.GetString . The file is about 9mb, and I've got plenty of free
memory
> (according the system monitor in the iPAQ, I've got 38.64MB free storage,

> and 61.85MB free program memory). Does anyone have any suggestions?
> Thanks...Dan
>
> try
> {
> fs = new FileStream(m_Fi leName, FileMode.Open, FileAccess.Read );
> r = new BinaryReader(fs );
> if (fs.Length > int.MaxValue)
> throw new Exception("The ServletRequest library currently will not > upload files greater than " + int.MaxValue + " bytes. " + m_FileName

+ " > contains " +

fs.Length +

"

> bytes.");
> byte[] fileContent = r.ReadBytes((in t) fs.Length);
> ASCIIEncoding ascii = new ASCIIEncoding() ;
> return ascii.GetString (fileContent, 0, fileContent.Len gth);
> }
> catch (Exception e)
> {
> throw new Exception("Erro r retrieving filecontent from " +

m_FileName,

> e);
> }
>
>