Get an array of bits that represent an int in c#

问题

Is there a way to show the representation of an int in bits in c#?

i.e.

1  = 00001
20 = 10100

etc.

I have tried using BitConverter with no luck. This should be simple, but I can't find a solution!

回答1:

Convert.ToString(value, base)

Converts the value of a 32-bit signed integer to its equivalent string representation in a specified base. Specify 2 for the base.

回答2:

Here's a one-liner using linq:

var myint = 20;
var bytes = Enumerable.Range(0, 32).Select(b => (myint >> b) & 1);
// { 0, 0, 1, 0, 1, 0 ... }

Of course this is in reverse order, to swap it around just use:

var myint = 20;
var bytes = Enumerable.Range(0, 32).Select(b => (myint >> (31 - b)) & 1);
// { ..., 0, 1, 0, 1, 0, 0 }

回答3:

You could also look at using a BitArray.

var array = new BitArray(BitConverter.GetBytes(1));

来源：https://stackoverflow.com/questions/18221769/get-an-array-of-bits-that-represent-an-int-in-c-sharp