Remove 00 from Byte Array in C# (Encoding to String)

Question

I use a NFC-Reader to read data. The data will be stores as byte[] bytes_credentials. Receiving data is working fine but now I want to encode the 16 byte Array to String. I use string str = Encoding.Default.GetString(new_data); for decoding the array. The string output is working fine if the byte Array is fully "booked up" (16 of 16 bytes used), for example: This is an test! -> 54 68 69 73 20 69 73 20 61 6e 20 74 65 73 74 21. The problem i am facing is, that if the NFC-Array is not fully "booked up", the Array look like this: This is! -> 54 68 69 73 20 69 73 21 00 00 00 00 00 00 00 00. The output in console looks like this: This is!????????.

How can I CHECK and REMOVE the empty bytes (00) from the Array. So that the Output looks like this: This is!.

Thank you for helping!!! I have checked previous posts but no of them are working for me...

If you're programming in C#, why did you add the totally irrelevant C language tag? Despite the names being similar, they are two very different languages. — Some programmer dude
– Some programmer dude, Commented Oct 2, 2022 at 13:07
As it stands you could just do yourBytes.Where(b => b != 0) or possibly yourBytes.Reverse().SkipWhile(b => b == 0).Reverse() But it sounds like you are reading into a buffer, but not using the resulting number of bytes read to pass into Encoding.GetString. Please show your code so we can understand how to improve it. — Charlieface
– Charlieface, Commented Oct 2, 2022 at 14:03

Rypox · Accepted Answer · 2022-10-02 14:07:12Z

1

You can use LINQ to filter your array further:

using System.Text;

var bytes_credentials = new byte[]
{
    0x54,
    0x68,
    0x69,
    0x73,
    0x20,
    0x69,
    0x73,
    0x21,
    0,
    0,
    0,
    0,
    0,
    0,
    0,
    0
};

Console.WriteLine(Encoding.Default.GetString(
    bytes_credentials.Where(b => b != 0).ToArray()
));

To learn more about LINQ, take a look here: https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/linq/

answered Oct 2, 2022 at 14:07

Rypox

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