how can I create a byte data type from a string? For example: The device I am sending data to, expects the data to be in the hexadecimal format. More specifically, it needs to be in the format: 0x{hexa_decimal_value}

Hard coded, it already worked sending data this way. I would create a byte array like this:

byte[] items_to_send_ = new byte[] {0x46, 0x30, 0x00};

Now I want to code it dynamically.

The code I am now trying to write looks like this:

var ListByte = new List<byte>();

foreach (char val in messageToConvert)
{

    var hexa_decimal_val = Convert.ToInt32(val).ToString("X");
    hexa_decimal_val = $"0x:{hexa_decimal_val}";

    byte val_ = CreateByteFromStringFunction(hexa_decimal_val); // How? 


    ListByte.Add(val_); 

}

The step in question is when creating the variable val_, where I want to build the byte value from hexa_decimal_val, but I just don't know how. Casting does not work, and I did not find any other function that would do it for me.

It feels like there should be a really easy solution to this, but I just don't seem to find it.
What makes looking for the correct answer tricky here is that I already know how to convert from string to hexadecimal value, but the conversion afterwards is nowhere to be found.

CodePudding user response：

You don't need to do create bytes from characters one by one and append to a list. You can usethis;

var encodedByteList = Encoding.UTF8.GetBytes(messageToConvert);

If you still want to do that, you can do something like this;

var encodedByteList = new List<byte>();

foreach (var character in messageToConvert)
{
    var correspondingByte = (byte)character;

    encodedByteList.Add(correspondingByte);
}

Or with LINQ, you can use this one liner;

var encodedByteList = messageToConvert.Select(c => (byte)c);