How to convert binary to decimal

Question

How can I convert a binary string, such as 1001101 to Decimal? (77)

Answer 1

I wanted a solution that always gave 32 bits no matter how big or small the number. So this is what I created.

public static string ConvertUintToBitString(uint Number)
{
    string _BitString = string.Empty;

    if (Number >= 2147483648)
    {
        _BitString += '1';
        Number = Number - 2147483648;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 1073741824)
    {
        _BitString += '1';
        Number = Number - 1073741824;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 536870912)
    {
        _BitString += '1';
        Number = Number - 536870912;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 268435456)
    {
        _BitString += '1';
        Number = Number - 268435456;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 134217728)
    {
        _BitString += '1';
        Number = Number - 134217728;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 67108864)
    {
        _BitString += '1';
        Number = Number - 67108864;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 33554432)
    {
        _BitString += '1';
        Number = Number - 33554432;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 16777216)
    {
        _BitString += '1';
        Number = Number - 16777216;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 8388608)
    {
        _BitString += '1';
        Number = Number - 8388608;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 4194304)
    {
        _BitString += '1';
        Number = Number - 4194304;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 2097152)
    {
        _BitString += '1';
        Number = Number - 2097152;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 1048576)
    {
        _BitString += '1';
        Number = Number - 1048576;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 524288)
    {
        _BitString += '1';
        Number = Number - 524288;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 262144)
    {
        _BitString += '1';
        Number = Number - 262144;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 131072)
    {
        _BitString += '1';
        Number = Number - 131072;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 65536)
    {
        _BitString += '1';
        Number = Number - 65536;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 32768)
    {
        _BitString += '1';
        Number = Number - 32768;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 16384)
    {
        _BitString += '1';
        Number = Number - 16384;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 8192)
    {
        _BitString += '1';
        Number = Number - 8192;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 4096)
    {
        _BitString += '1';
        Number = Number - 4096;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 2048)
    {
        _BitString += '1';
        Number = Number - 2048;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 1024)
    {
        _BitString += '1';
        Number = Number - 1024;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 512)
    {
        _BitString += '1';
        Number = Number - 512;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 256)
    {
        _BitString += '1';
        Number = Number - 256;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 128)
    {
        _BitString += '1';
        Number = Number - 128;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 64)
    {
        _BitString += '1';
        Number = Number - 64;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 32)
    {
        _BitString += '1';
        Number = Number - 32;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 16)
    {
        _BitString += '1';
        Number = Number - 16;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 8)
    {
        _BitString += '1';
        Number = Number - 8;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 4)
    {
        _BitString += '1';
        Number = Number - 4;
    }
    else
    {
        _BitString += '0';
    }
    if (Number >= 2)
    {
        _BitString += '1';
        Number = Number - 2;
    }
    else
    {
        _BitString += '0';
    }
    if (Number == 1)
    {
        _BitString += '1';
    }
    else
    {
        _BitString += '0';
    }

    return _BitString;
}