How to pad a binary string with zeros?

问题

string binary = Convert.ToString(15, 2);

Console.WriteLine("{0}", binary);

Prints:

1111

I want it to print 00001000

Because the data type is of string and not integer I cannot do something like this:

Console.WriteLine("{0:00000000}", binary);

回答1:

Console.WriteLine( binary.PadLeft(8, '0'));

回答2:

You can try this one:

Convert.ToString(15, 2).PadLeft(8, '0');

It should give you 00001111

来源：https://stackoverflow.com/questions/7682628/how-to-pad-a-binary-string-with-zeros