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Accepted
Sergio Ramos
Asked: 2020-05-09 15:34:48 +0800 CST 2020-05-09 15:34:48 +0800 CST

How to combine two byte arrays with a delimiter between them, in C#

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My question is simply how I could join two byte arrays together and delimit them. In the following example I join them and write them as a single file. But, first I don't know how I could join them with a delimiter, a comma or something to separate them so that when my program starts it will be able to get them through a split. The code is the following:

//Everything seems fine -> Reading bytes
Console.WriteLine("[*] Reading Data...");
byte[] plainBytes = File.ReadAllBytes(file);

//Yep, got bytes -> Encoding
Console.WriteLine("[*] Encoding Data...");
byte[] encodedBytes = encodeBytes(plainBytes, pass);

Console.WriteLine("[*] Save to Output File... ");

//Leer el fichero
Console.WriteLine("[*] Reading fichero...");
byte[] Stub = File.ReadAllBytes("rutafichero");

// ::: Create new List of bytes
var list = new List<byte>();
list.AddRange(encodedBytes);
list.AddRange(Stub);

// ::: Call ToArray to convert List to array
byte[] resultado = list.ToArray();

//write bytes
File.WriteAllBytes(outFile, resultado);

//File.WriteAllBytes(outFile, encodedBytes);
Console.WriteLine("Done!");

Console.WriteLine("\n[*] File successfully encoded!");

Then my first byte array (file 1) will be + joined with the other byte array (file 2) and written to a single file. When I boot the resulting file I will be able to get the two arrays via a split. That is the objective that I wanted to carry out and that unfortunately I did not know how because firstly I do not know delimitar dos byte array combinadosand secondly how to extract them later. The goal was to do it with an assembly.

c#

1 Answers

  1. Best Answer

    Personally, if you want to write 2 arrays to a file and be able to read them separately later, I would use the class BinaryWriter, to make it all automatic for you. The idea of ​​using a split with a comma doesn't sound right to me in this case.

    For example, according to your example, starting from the following 2 byte arrays:

    byte[] encodedBytes = ...;
byte[] Stub = ...;

    You can write the 2 arrays to a file as follows:

    using (var writer = new BinaryWriter(File.Open(outFile, FileMode.Create)))
{
    writer.Write(encodedBytes.Length);
    writer.Write(encodedBytes);
    writer.Write(Stub.Length);
    writer.Write(Stub);
}

    And then you can retrieve them using the class BinaryReaderlike this:

    using (var reader = new BinaryReader(File.Open(outFile, FileMode.Open)))
{
    encodedBytes = reader.ReadBytes(reader.ReadInt32());
    Stub = reader.ReadBytes(reader.ReadInt32());
}
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