> I am learning how to read and write files.  Text files were easy, but binary
> files have me confused.  As per the tutorial, I used BinaryReader to read a
> file and put the contents into a ByteArray:
>
> Dim fsReadStream As New FileStream(MyFileName, FileMode.Open,
> FileAccess.Read)
> Dim brReader As New BinaryReader(fsReadStream)
> Dim ByteArray() As Byte
> While brReader.PeekChar() > -1
> ByteArray = brReader.ReadBytes(1)
>
> ' This is the part where I don't know how to do
>
> End While
> brReader.Close()
>
> How do I actually use the data in that ByteArray.  I have basically created
> a file containing some text, some images and some video (I plan to encrypt
> this later).  Now I want to open the file and read it, then parse it, put
> the text into a label, put the image into a picturebox etc.  Any tutorials
> you can point me to, or any information at all will be useful.
>
> Thanx,
> --
> Anil Gupte
> www.keeninc.net
> www.icinema.com

"Olie" <owa***@gmail.com> wrote in message
news:1158310674.072420.254240@d34g2000cwd.googlegroups.com...
> It all depends on what type of data you want to read from the Binary
> file and the type of that data. The example you have quoted simply
> reads a single byte at a time out of the binary file which is not very
> usful and very inefficient if you want to read a whole string or image.
>
> I would recomend you look at some of the functions of BinaryReader as
> it is designed to perform the file parsing and can realy help you. I
> have to guess here as I do not know the format of your file but here is
> an example:
>
> UINT16 DataType
> UINT32 DataSize
> byte[] Data
>
> With this structure of data in the binary file I would call these
> functions on the BinaryReader object:
>
> DataType = brReader.ReadUInt16()
> DataSize = brReader.ReadUInt32()
>
> and assuming the data is a string
>
> string = brReader.ReadString()
>
> or
>
> MyByteArray = brReader.ReadBytes(DataSize)
> string = MyByteArray.ToString()
>
> You would obviously need to put in some checking to see when the end of
> the file has been reached.
>
>
> Anil Gupte wrote:
>> I am learning how to read and write files.  Text files were easy, but
>> binary
>> files have me confused.  As per the tutorial, I used BinaryReader to read
>> a
>> file and put the contents into a ByteArray:
>>
>> Dim fsReadStream As New FileStream(MyFileName, FileMode.Open,
>> FileAccess.Read)
>> Dim brReader As New BinaryReader(fsReadStream)
>> Dim ByteArray() As Byte
>> While brReader.PeekChar() > -1
>> ByteArray = brReader.ReadBytes(1)
>>
>> ' This is the part where I don't know how to do
>>
>> End While
>> brReader.Close()
>>
>> How do I actually use the data in that ByteArray.  I have basically
>> created
>> a file containing some text, some images and some video (I plan to
>> encrypt
>> this later).  Now I want to open the file and read it, then parse it, put
>> the text into a label, put the image into a picturebox etc.  Any
>> tutorials
>> you can point me to, or any information at all will be useful.
>>
>> Thanx,
>> --
>> Anil Gupte
>> www.keeninc.net
>> www.icinema.com
>

> Olie:
>
> I tried what you suggested and the string = brReader.ReadString() worked
> fine for the first part of the file, because it was string data and I put it
> in a loop as below:
>
> While brReader.PeekChar() > 31 And brReader.PeekChar() < 127
> strRead = strRead & brReader.ReadString()
> Label1.Text = strRead
> End While
> However, the rest is not string data and I don't know how to treat it.  As I
> mentioned in my original message, I am trying to create a composite file
> (like a package) consisting of text, pictures and other types of data (even
> a video).  What I would ideally like is something like this:
>
> While brReader.PeekChar() > -1 ' until EOF
>     Read some data
>     Figure out what is in it (Text, part of an image.  whatever)
>     Take the text part and put it in a label to display (as above)
>     Store the binary part in a variable (or append if I already have some in
> there)
>     ... and keep going in this loop till I reach the end of the binary part
>     Put the binary part in a PictureBox (assuming for the moment it is an
> image)
>     Back to the top of the loop to read some more data (could be more text
> or another picture or whatever)
> End While
>
> Of course, I am the creator of the file (I wrote another program to write
> these types of files), so I can put markers that tell me where the text ends
> and the image part starts etc.
>
> --
> Anil Gupte
> www.keeninc.net
> www.icinema.com
>
> "Olie" <owa***@gmail.com> wrote in message
> news:1158310674.072420.254240@d34g2000cwd.googlegroups.com...
> > It all depends on what type of data you want to read from the Binary
> > file and the type of that data. The example you have quoted simply
> > reads a single byte at a time out of the binary file which is not very
> > usful and very inefficient if you want to read a whole string or image.
> >
> > I would recomend you look at some of the functions of BinaryReader as
> > it is designed to perform the file parsing and can realy help you. I
> > have to guess here as I do not know the format of your file but here is
> > an example:
> >
> > UINT16 DataType
> > UINT32 DataSize
> > byte[] Data
> >
> > With this structure of data in the binary file I would call these
> > functions on the BinaryReader object:
> >
> > DataType = brReader.ReadUInt16()
> > DataSize = brReader.ReadUInt32()
> >
> > and assuming the data is a string
> >
> > string = brReader.ReadString()
> >
> > or
> >
> > MyByteArray = brReader.ReadBytes(DataSize)
> > string = MyByteArray.ToString()
> >
> > You would obviously need to put in some checking to see when the end of
> > the file has been reached.
> >
> >
> > Anil Gupte wrote:
> >> I am learning how to read and write files.  Text files were easy, but
> >> binary
> >> files have me confused.  As per the tutorial, I used BinaryReader to read
> >> a
> >> file and put the contents into a ByteArray:
> >>
> >> Dim fsReadStream As New FileStream(MyFileName, FileMode.Open,
> >> FileAccess.Read)
> >> Dim brReader As New BinaryReader(fsReadStream)
> >> Dim ByteArray() As Byte
> >> While brReader.PeekChar() > -1
> >> ByteArray = brReader.ReadBytes(1)
> >>
> >> ' This is the part where I don't know how to do
> >>
> >> End While
> >> brReader.Close()
> >>
> >> How do I actually use the data in that ByteArray.  I have basically
> >> created
> >> a file containing some text, some images and some video (I plan to
> >> encrypt
> >> this later).  Now I want to open the file and read it, then parse it, put
> >> the text into a label, put the image into a picturebox etc.  Any
> >> tutorials
> >> you can point me to, or any information at all will be useful.
> >>
> >> Thanx,
> >> --
> >> Anil Gupte
> >> www.keeninc.net
> >> www.icinema.com
> >

"Olie" <owa***@gmail.com> wrote in message
news:1158573703.561672.147830@i3g2000cwc.googlegroups.com...
>I explained in my previous post how to read a single UInt value out of
> the binary file. Just simply read out a value first to deternmine what
> type of data follows (string, picture, video). How you go about reading
> out the data depends on what variable you want to read the data to. In
> the case of a picture, the Bitmap constructor takes in a stream
> directly so you could just call the bitmap constructor with
> fsReadStream.
>
> Picture = New Bitmap(fsReadStream)
>
> I was guessing that there was a ToString() function on a byte array.
> The correct code to convert a byte array to a string is:
>
> Dim Encoder As New System.Text.UTF7Encoding()
> Dim MyString As String = Encoder.GetString(ByteArray)
>
> As for the video, I am not sure what to do with that and I think that
> reading a whole video into RAM is probably not the best idea. You could
> extract the video section to a seperate file and then just play the
> video from there.
>
> Anil Gupte wrote:
>> Olie:
>>
>> I tried what you suggested and the string = brReader.ReadString() worked
>> fine for the first part of the file, because it was string data and I put
>> it
>> in a loop as below:
>>
>> While brReader.PeekChar() > 31 And brReader.PeekChar() < 127
>> strRead = strRead & brReader.ReadString()
>> Label1.Text = strRead
>> End While
>> However, the rest is not string data and I don't know how to treat it.
>> As I
>> mentioned in my original message, I am trying to create a composite file
>> (like a package) consisting of text, pictures and other types of data
>> (even
>> a video).  What I would ideally like is something like this:
>>
>> While brReader.PeekChar() > -1 ' until EOF
>>     Read some data
>>     Figure out what is in it (Text, part of an image.  whatever)
>>     Take the text part and put it in a label to display (as above)
>>     Store the binary part in a variable (or append if I already have some
>> in
>> there)
>>     ... and keep going in this loop till I reach the end of the binary
>> part
>>     Put the binary part in a PictureBox (assuming for the moment it is an
>> image)
>>     Back to the top of the loop to read some more data (could be more
>> text
>> or another picture or whatever)
>> End While
>>
>> Of course, I am the creator of the file (I wrote another program to write
>> these types of files), so I can put markers that tell me where the text
>> ends
>> and the image part starts etc.
>>
>> --
>> Anil Gupte
>> www.keeninc.net
>> www.icinema.com
>>
>> "Olie" <owa***@gmail.com> wrote in message
>> news:1158310674.072420.254240@d34g2000cwd.googlegroups.com...
>> > It all depends on what type of data you want to read from the Binary
>> > file and the type of that data. The example you have quoted simply
>> > reads a single byte at a time out of the binary file which is not very
>> > usful and very inefficient if you want to read a whole string or image.
>> >
>> > I would recomend you look at some of the functions of BinaryReader as
>> > it is designed to perform the file parsing and can realy help you. I
>> > have to guess here as I do not know the format of your file but here is
>> > an example:
>> >
>> > UINT16 DataType
>> > UINT32 DataSize
>> > byte[] Data
>> >
>> > With this structure of data in the binary file I would call these
>> > functions on the BinaryReader object:
>> >
>> > DataType = brReader.ReadUInt16()
>> > DataSize = brReader.ReadUInt32()
>> >
>> > and assuming the data is a string
>> >
>> > string = brReader.ReadString()
>> >
>> > or
>> >
>> > MyByteArray = brReader.ReadBytes(DataSize)
>> > string = MyByteArray.ToString()
>> >
>> > You would obviously need to put in some checking to see when the end of
>> > the file has been reached.
>> >
>> >
>> > Anil Gupte wrote:
>> >> I am learning how to read and write files.  Text files were easy, but
>> >> binary
>> >> files have me confused.  As per the tutorial, I used BinaryReader to
>> >> read
>> >> a
>> >> file and put the contents into a ByteArray:
>> >>
>> >> Dim fsReadStream As New FileStream(MyFileName, FileMode.Open,
>> >> FileAccess.Read)
>> >> Dim brReader As New BinaryReader(fsReadStream)
>> >> Dim ByteArray() As Byte
>> >> While brReader.PeekChar() > -1
>> >> ByteArray = brReader.ReadBytes(1)
>> >>
>> >> ' This is the part where I don't know how to do
>> >>
>> >> End While
>> >> brReader.Close()
>> >>
>> >> How do I actually use the data in that ByteArray.  I have basically
>> >> created
>> >> a file containing some text, some images and some video (I plan to
>> >> encrypt
>> >> this later).  Now I want to open the file and read it, then parse it,
>> >> put
>> >> the text into a label, put the image into a picturebox etc.  Any
>> >> tutorials
>> >> you can point me to, or any information at all will be useful.
>> >>
>> >> Thanx,
>> >> --
>> >> Anil Gupte
>> >> www.keeninc.net
>> >> www.icinema.com
>> >
>

"Olie" <owa***@gmail.com> wrote in message
news:1158310674.072420.254240@d34g2000cwd.googlegroups.com...
> It all depends on what type of data you want to read from the Binary
> file and the type of that data. The example you have quoted simply
> reads a single byte at a time out of the binary file which is not very
> usful and very inefficient if you want to read a whole string or image.
>
> I would recomend you look at some of the functions of BinaryReader as
> it is designed to perform the file parsing and can realy help you. I
> have to guess here as I do not know the format of your file but here is
> an example:
>
> UINT16 DataType
> UINT32 DataSize
> byte[] Data
>
> With this structure of data in the binary file I would call these
> functions on the BinaryReader object:
>
> DataType = brReader.ReadUInt16()
> DataSize = brReader.ReadUInt32()
>
> and assuming the data is a string
>
> string = brReader.ReadString()
>
> or
>
> MyByteArray = brReader.ReadBytes(DataSize)
> string = MyByteArray.ToString()
>
> You would obviously need to put in some checking to see when the end of
> the file has been reached.
>
>
> Anil Gupte wrote:
>> I am learning how to read and write files.  Text files were easy, but
>> binary
>> files have me confused.  As per the tutorial, I used BinaryReader to read
>> a
>> file and put the contents into a ByteArray:
>>
>> Dim fsReadStream As New FileStream(MyFileName, FileMode.Open,
>> FileAccess.Read)
>> Dim brReader As New BinaryReader(fsReadStream)
>> Dim ByteArray() As Byte
>> While brReader.PeekChar() > -1
>> ByteArray = brReader.ReadBytes(1)
>>
>> ' This is the part where I don't know how to do
>>
>> End While
>> brReader.Close()
>>
>> How do I actually use the data in that ByteArray.  I have basically
>> created
>> a file containing some text, some images and some video (I plan to
>> encrypt
>> this later).  Now I want to open the file and read it, then parse it, put
>> the text into a label, put the image into a picturebox etc.  Any
>> tutorials
>> you can point me to, or any information at all will be useful.
>>
>> Thanx,
>> --
>> Anil Gupte
>> www.keeninc.net
>> www.icinema.com
>