How to remove nulls from byte array?

Question

For some reason, the byte array output of BeginReceive fills up with nulls and then the data.

BeginReceive:

AsyncResult = connectSocket.BeginReceive(RecvBuffer2,
                                          0, RecvBuffer2.Length,
                                          SocketFlags.None,
                                          OnDataRecvCallback, null);

Byte Array declaration:

public static byte[] RecvBuffer2 = new byte[9999];

How to remove the nulls and keep the rest of the data?

Could the 'real' data start with a 0x00? What (sort of) data do you expect? — Henk Holterman
– Henk Holterman, Commented Aug 12, 2010 at 10:12

Heinzi · Accepted Answer · 2010-08-12 10:12:05Z

3

Should be doable with LINQ. Untested, since I don't have Visual Studio available right now, but it should be something like this:

var usefulBuffer = RecvBuffer2.SkipWhile(x => x == 0).ToArray()

answered Aug 12, 2010 at 10:12

Heinzi

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3 Comments

lesderid Over a year ago

This answer worked but I had to Reverse (before and after SkipWhile) the array to make it work. Thank You. Answer accepted!

Piyush Over a year ago

dim newBuffer1 = newBuffer.SkipWhile(x => x == 0).ToArray() above one is showing error near == on hover on error showing Expression expected.

Heinzi Over a year ago

@picnic4u: The VB syntax would be SkipWhile(Function(x) x = 0).

user2288650 · Accepted Answer · 2018-01-17 00:32:18Z

1

We can modify Heinzi's Answer to

  RecvBuffer2= RecvBuffer2.Where(x => x != 0).ToArray();

Now there is no need to reverse the array.

The key to the solution is c# predicate.

answered Jan 17, 2018 at 0:32

user2288650

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1 Comment

Manny Over a year ago

This worked for me "Encoding.ASCII.GetString(model.Timestamp.Where(x => x != 0).ToArray()).TrimEnd();"

jensatch · Accepted Answer · 2025-03-13 17:23:10Z

0

This modification of Heinzi's answer also works:

var usefulBuffer = RecvBuffer2.TakeWhile(x => x != 0).ToArray();

answered Mar 13 at 17:23

jensatch

1

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