Size of Byte Array for big files?

[Anil Gupte]

I am using the following:
Dim fsReadStream As New FileStream(Text BoxVideoFileNam e.Text, FileMode.Open,
FileAccess.Read )
Dim brReader As New BinaryReader(fs ReadStream)
Dim ByteArray() As Byte

ByteArray = brReader.ReadBy tes(fsReadStrea m.Length)

This works fine for smaller files, but crashes with an overflow exception
with a large file (2.5GB). Is the size of the array a problem? How can I
change it? Any other solution?

Thanx,
--
Anil Gupte

https://www.keeninc.net

www.icinema.com

[Patrice]

Re: Size of Byte Array for big files?

AFAIK arrays are indexed using an integer whose max value allows for 2 Go.

Even for smaller files it's likely better to avoid loading a whole file in
memory unless this is strictly needed and especially if those files are not
limited in size. A common practice is to read a file in "chunks" so that you
consume only the size of a buffer that holds the current "access window" on
file data...

So it would depend what you are doing once the whole file is loaded in
memory....

---
Patrice

"Anil Gupte" <anil-list@icinema.co ma écrit dans le message de news:
urVPH984HHA.391 6@TK2MSFTNGP02. phx.gbl...

>I am using the following:
Dim fsReadStream As New FileStream(Text BoxVideoFileNam e.Text,
FileMode.Open, FileAccess.Read )
Dim brReader As New BinaryReader(fs ReadStream)
Dim ByteArray() As Byte
>
ByteArray = brReader.ReadBy tes(fsReadStrea m.Length)
>
This works fine for smaller files, but crashes with an overflow exception
with a large file (2.5GB). Is the size of the array a problem? How can I
change it? Any other solution?
>
Thanx,
--
Anil Gupte

https://www.keeninc.net

www.icinema.com
>

[Spam Catcher]

Re: Size of Byte Array for big files?

"Anil Gupte" <anil-list@icinema.co mwrote in
news:urVPH984HH A.3916@TK2MSFTN GP02.phx.gbl:

This works fine for smaller files, but crashes with an overflow
exception with a large file (2.5GB). Is the size of the array a
problem? How can I change it? Any other solution?

Yes, you're creating a 2.5GB array in memory. I believe there is a 2GB
limit?

You should stream the file using a smaller array as data is needed.

[Anil Gupte]

Re: Size of Byte Array for big files?

Thanx for your response. How do I "stream the file"?

Best,
--
Anil Gupte

https://www.keeninc.net

www.icinema.com

"Spam Catcher" <spamhoneypot@r ogers.comwrote in message
news:Xns99938A6 26E97Fusenethon eypotrogers@127 .0.0.1...

"Anil Gupte" <anil-list@icinema.co mwrote in
news:urVPH984HH A.3916@TK2MSFTN GP02.phx.gbl:
>

>This works fine for smaller files, but crashes with an overflow
>exception with a large file (2.5GB). Is the size of the array a
>problem? How can I change it? Any other solution?

>
Yes, you're creating a 2.5GB array in memory. I believe there is a 2GB
limit?
>
You should stream the file using a smaller array as data is needed.