I want to the bits (0 or one) from a byte in a string but I don't know how? Thanks.
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5 Answers
Take a look at Convert.ToString(). You can use it both ways, for the conversion byte->bit-string and vice versa.
byte value = 56;
// There ...
string bits = Convert.ToString(value, 2);
// ...and Back Again
value = Convert.ToByte(bits, 2);
1 Comment
Edward Ned Harvey
This answer should be the accepted answer. When given only a single argument, Convert.ToString(byte) returns a hex string, but when given the second argument, Convert.ToString(byte,int) can use base 2, 8, 10, or 16.
Convert.ToString(56,2) returns "111000" but if you want all the bits, then Convert.ToString(56,2).PadLeft(8,'0') returns "00111000"Here's clweek's re-written method, that actually works:
I have used StringBuilder class instead of char array.
Sample: byteToBitsString(157) prints "00101111"
private string byteToBitsString(byte byteIn)
{
var bitsString = new StringBuilder(8);
bitsString.Append(Convert.ToString((byteIn / 128) % 2));
bitsString.Append(Convert.ToString((byteIn / 64) % 2));
bitsString.Append(Convert.ToString((byteIn / 32) % 2));
bitsString.Append(Convert.ToString((byteIn / 16) % 2));
bitsString.Append(Convert.ToString((byteIn / 8) % 2));
bitsString.Append(Convert.ToString((byteIn / 4) % 2));
bitsString.Append(Convert.ToString((byteIn / 2) % 2));
bitsString.Append(Convert.ToString((byteIn / 1) % 2));
return bitsString.ToString();
}
1 Comment
clweeks
Was mine bugged? I converted it from VB and don't use C# regularly, so there's room for dumb error, but what is it?
Or the deluxe variant of the bit banging way to do it:
public static string ToByteFormat(int valIn, int digits)
{
var bitsString = new StringBuilder(digits);
int mask = (1 << digits - 1);
for(int i = 0; i < digits; i++)
{
bitsString.Append((valIn & mask) != 0 ? "1" : "0");
mask >>= 1;
}
return bitsString.ToString();
}
Comments
Here's one bit banging way to do it:
public static string ByteToBinaryString(byte byteIn)
{
StringBuilder out_string = new StringBuilder();
byte mask = 128;
for (int i = 7; i >=0 ; --i)
{
out_string.Append((byteIn & mask) != 0 ? "1" : "0");
mask >>= 1;
}
return out_string.ToString();
}
Comments
I bet there's a cleverer way to do this, but it works:
private string byteToBitsString(byte byteIn)
{
char[] bits = new char[8];
bits[0] = Convert.ToString((byteIn / 128) % 2);
bits[1] = Convert.ToString((byteIn / 64) % 2);
bits[2] = Convert.ToString((byteIn / 32) % 2);
bits[3] = Convert.ToString((byteIn / 16) % 2);
bits[4] = Convert.ToString((byteIn / 8) % 2);
bits[5] = Convert.ToString((byteIn / 4) % 2);
bits[6] = Convert.ToString((byteIn / 2) % 2);
bits[7] = Convert.ToString((byteIn / 1) % 2);
return bits;
}
2 Comments
Edward Ned Harvey
See the other answer using Convert.ToString(value,2).PadLeft(8,'0') instead.
stackh34p
This answer is actually almost working, it had the wrong braces in the code, as it was converted from VB and the author probably did not have much experience in C# to spot the error. I fixed it. Obviously, this answer is quoted here and the quote gets positive score, it is IMHO reasonable to give a chance to the original answer to shine as well.