How to read from a file into a structure?

[Alejandro Lapeyre]

I am writing a class to wrap a RIFF file, so i have to read and decode some
structured data on the file.

For example, in the begining of file is a header:

Public Structure RiffHeader
Public id As Int32 ' (a FOURCC actually)
Public fileSize As Int32
Public fileType As Int32
End Structure

How can a I read from the file into a RiffHeader structure?

Regards, Alejandro Lapeyre

Public Sub GetHeaderInfo(ByRef myHeader As RiffHeader)
Dim myFile As Integer
Dim i As Integer

myFile = FreeFile
Open "aFileName.riff" For Random Access Read _
As myFile Len = len(RiffHeader) // or is it sizeOf()?
Get myFile, 1, myHeader
Close myFile
End Sub

-----Original Message-----
I am writing a class to wrap a RIFF file, so i have to read and decode somestructured data on the file.

For example, in the begining of file is a header:

Public Structure RiffHeader
Public id As Int32 ' (a FOURCC actually)
Public fileSize As Int32
Public fileType As Int32
End Structure

How can a I read from the file into a RiffHeader structure?
Regards, Alejandro Lapeyre
.

[Herfried K. Wagner [MVP]]

* <an*******@discussions.microsoft.com> scripsit:

Public Sub GetHeaderInfo(ByRef myHeader As RiffHeader)
Dim myFile As Integer
Dim i As Integer

myFile = FreeFile
Open "aFileName.riff" For Random Access Read _
As myFile Len = len(RiffHeader) // or is it sizeOf()?
Get myFile, 1, myHeader
Close myFile
End Sub

That's VB6 code, isn't it? In VB.NET you will have to use 'FileOpen',
'FileGet', 'FileClose' and so on.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Alejandro Lapeyre]

Thank you for your time.
I am looking for the ".NET way" to do it. (no VB specifics libraries).

I am using IO.FileStream and it reads into a Bytes() as byte buffer. How can
i move this bytes into a structure?
Do I have to look in serialization?

Thank you, again. :-)

Regards,
Alejandro Lapeyre

[Alejandro Lapeyre]

Thanks for your time!

I was looking for a "standard .NET way" to do it.

Finaly, i have a working class using a FileStream and a BinaryReader, I fill
the structure using the BinaryReader.ReadInt32 and ReadChar methods.

Is there any other way to fill a structure from a some Bytes()?

Regards,
Alejandro Lapeyre

[Herfried K. Wagner [MVP]]

* "Alejandro Lapeyre" <no*********************@hotmail.com> scripsit:

I was looking for a "standard .NET way" to do it.

Finaly, i have a working class using a FileStream and a BinaryReader, I fill
the structure using the BinaryReader.ReadInt32 and ReadChar methods.

Is there any other way to fill a structure from a some Bytes()?

I don't think so. But why not use VB.NET's methods for doing that?

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>