Convert a byte into 8 bits with true or false flags

Question

I am trying to read a byte and convert into a bit. I am trying to create a flagging system.

So byte 3 would be raise the first two flags as true. However When I try and convert it just passes the value of the byte as the length of the BitArray. Any help greatly appreciated.

BinaryReader br = new BinaryReader(filestream);

Byte flag = br.ReadByte();

BitArray flags = new BitArray(flag); 

record.Isbool = flags[0];
record.Isbool1 = flags[1];

etc

Answer 1

new BitArray(flag); uses the BitArray(Int32 length) constructor. This sets the capacity, not what you want.

You can use

    new BitArray(new byte[] { flag }); 

Answer 2

You need to use

BitArray flags = new BitArray(new byte[] {flag});

The byte[] overload uses the bits from the bytes; at the moment you're calling the int overload which gives the length as you've discovered.

Answer 3

BinaryReader br = new BinaryReader(filestream);

Byte flag = br.ReadByte();

BitArray flags = new BitArray(new byte[] {flag}); 

record.Isbool = flags[0];
record.Isbool1 = flags[1];

Should work, by invoking the BitArray(byte[]) constructor.

Answer 4

Did you try to mask. int flag = value & 0x01 to mask the 1st bit.