Copy IPv4-address from byte array to string

Question

I have an ipv4-address stored in a byte array. At index n and until index n+3 each index takes 4 bytes.

(index)              n       n+1     n+2    n+3                 
[..] [..] [..] [ 1st byte ][ 2nd ] [ 3rd ] [ 4th ] [..] [..]

how to copy this construction to string. I want to receive string like "192.168.0.1", while

byteArray[n] =   192;
byteArray[n+1] = 168;
byteArray[n+2] = 0;
byteArray[n+3] = 1;

Finally, the problem was solved and the solution is:

string str = recCommand.parameters[10] + "." + recCommand.parameters[11] +
 "." +   recCommand.parameters[12] + "." + recCommand.parameters[13];

so what is stored in tbe Byte[] array before your first octet? If its null, then you can simply look through the array checking if !null and storing the results in a string.... loop byte[] array..check !null ... += string. sorry for the crudeness of the post. — Botonomous
– Botonomous, Commented Jun 22, 2012 at 15:44
there is part of query command received via TCP, and it is not a null — vard
– vard, Commented Jun 22, 2012 at 15:45
@vard - What have you tried exactly? Just convert the index n through n + 3 to a string and combine them. Until you actually show what you have tried I have to down vote this question. — Security Hound
– Security Hound, Commented Jun 22, 2012 at 15:51
@Ramhound yes, that's I've tried. Here is the piece of real code: string str = recCommand.parameters[10] + "." + recCommand.parameters[11] + "." + recCommand.parameters[12] + "." + recCommand.parameters[13]; — vard
– vard, Commented Jun 22, 2012 at 15:56
@vard - You need to update the question with what you have attempted. — Security Hound
– Security Hound, Commented Jun 22, 2012 at 19:22

Orn Kristjansson · Accepted Answer · 2012-06-22 15:51:13Z

3

Something like this

        byte[] some = { 192, 168, 0, 1 };
        String ip = "" + some[0] + "." + some[1] + "." + some[2] + "." + some[3];
        Console.WriteLine("ip=" + ip  );

answered Jun 22, 2012 at 15:51

Orn Kristjansson

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2 Comments

vard Over a year ago

Yeah, thanks, there was a comment by Anne with same advice, but unfortunately author deleted it. It works, great, thanks.

Matthew Brubaker Over a year ago

could be simplified to string.Format("{0}.{1}.{2}.{3}", some)

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