BinaryWritting sequencially

[thiago777]

Hello,

I have to proccess big files (around 4GB) and to prevent Out of Memory exceptions I am splitting the file in 256MB blocks. The problem is, as I have to create the file sequencially (block by block), I dont know how to "stick"/"concatenate" the remaining pieces to the last one (or first processed).

I have to "add" the rest of the bytes to the file, anyone knows if this is possible? I am using FileStream and BinaryWriter to do it.

For example, to read I can do this:
[PHP]
Dim BInput As New FileStream(Filename, FileMode.Open, FileAccess.Read)
Dim Reader As New BinaryReader(BInput)
'then inside a loop with variable k:
Reader.Read(mydata, k * Dtblock, Dtblock)
'loop end[/PHP]

(where Dtblock is a constant that indicates 256MB.)

but then I dont know the oposite of the instructions above (to write)

thanks in advance!

[thiago777]

Hello,

I have to proccess big files (around 4GB) and to prevent Out of Memory exceptions I am splitting the file in 256MB blocks. The problem is, as I have to create the file sequencially (block by block), I dont know how to "stick"/"concatenate" the remaining pieces to the last one (or first processed).

I have to "add" the rest of the bytes to the file, anyone knows if this is possible? I am using FileStream and BinaryWriter to do it.

For example, to read I can do this:
[PHP]
Dim BInput As New FileStream(Filename, FileMode.Open, FileAccess.Read)
Dim Reader As New BinaryReader(BInput)
'then inside a loop with variable k:
Reader.Read(mydata, k * Dtblock, Dtblock)
'loop end[/PHP]

(where Dtblock is a constant that indicates 256MB.)

but then I dont know the oposite of the instructions above (to write)

thanks in advance!

Would it work like:

[PHP]Dim BOutput As New FileStream(TxtBoxOutput.Text, FileMode.Append, FileAccess.Write)
Dim Writer As New BinaryWriter(BOutput)
Writer.Write(buffer)[/PHP]

??