Split a result from File.ReadAllBytes

Question

My code here reads all the bytes of a image and stores it in the byte array. Is there a way to convert these bytes into ascii then split them up to 512-char(ascii char) long pieces? Like when you try splitting a string based on the length, you can do that. Can you do something similar to splitting this into 512 lengths? This is to send to the server.

byte[] imagesize; 
imagesize = File.ReadAllBytes(@"C:\image.jpeg");
Console.Write(imagesize[1].ToString());

What I really want is to convert these bytes into plain ASCII format (Which in C# would be Encoding.ASCII), then split that long ASCII line from converting all the bytes into 512-char(?) long chunks into a byte array (byte[] chunks). So when I send the packets I can do

 for(i=0; i<AmountOfChunks; i++)
 {
      Packet.payload = chunks[i];
      //The "chunks" is the ASCII formated array.
 }

If someone knows how to do this, it would greatly help. Thanks, if there's anything more, i'll try to explain it in more detail if i can. If this is wrong, because i know a byte is 8-bit each. Then somehow to be able to do it, maybe the bytes into a list?

Those comments don't really explain anything I'm afraid, could you update your question with detailed information on what exactly you need to send to the server? — user555045
– user555045, Commented May 13, 2012 at 20:36
@Nom what do you expect from ASCII represantation of this int 1234567890, 0gKWSQ==, D2-02-96-49 or D2029649? They are all correct. — L.B
– L.B, Commented May 13, 2012 at 21:04
Convert to ASCII how? base64? base85? 7-bit encoding? hexadecimal? — user555045
– user555045, Commented May 13, 2012 at 21:04
@L.B To be honest, I don't know exactly how this server makes the ASCII characters. This link (screen shot) is an example of the 512-char prntscr.com/97iec. I'm assuming it looks like ASCII, though if i'm wrong. My great apologies for the confusion. — Nom
– Nom, Commented May 13, 2012 at 21:10

BrokenGlass · Accepted Answer · 2012-05-13 20:09:11Z

2

Not clear why you needs this, but you might be looking for Convert.ToBase64String() to get a string representation. For chunking you can just walk over the resulting string and split at the appropriate indexes:

byte[] imagesize = File.ReadAllBytes(@"C:\image.jpeg");
string base64String = Convert.ToBase64String(imagesize);

List<string> chunks = new List<string>();
for (int i = 0; i < base64String.Length; i+=512)
{
    chunks.Add(base64String.Substring(i, Math.Min(512, base64String.Length - i)));
}

answered May 13, 2012 at 20:09

BrokenGlass

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4 Comments

Nom Over a year ago

I need this to send a packet to a server, which the max length is 512 characters, so to send a whole image to the server, it needs to be split up into 512 chunks then sent one after another. So I needed to find a way to split the readallbytes. Thanks!

Nom Over a year ago

Yeah, thats why I also need to convert it to ASCII, which I can attempt to do, but if you know the proper code to do it, it can be a great help.

L.B Over a year ago

@Nom There are many ways to convert the binary data to ASCII strings. What format does your server expects?

Nom Over a year ago

@L.B I believe it's just the standard ASCII string. It just doesn't accept raw bytes.

Likurg · Accepted Answer · 2012-05-13 20:51:52Z

0

Try to make this

int i=0;  
do
{
     sendBytes = imagesize.Skip(512*i).Take(512).ToArray();
     //Your function of send
     i++;
}
while(imagesize.Count()-512*i>0)

answered May 13, 2012 at 20:51

Likurg

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