urgent! please help me!

Question

hello to all
       i know int convert to binary,but i don't know binary convert to int.
      for example:
            string ss = Convert.ToInt32("1010", 2).ToString();
            MessageBox.Show(ss);
      please told me ,how to convert to binary...
     thanks.

fiona zhang · Answer

thanksfriend!

Craig Murphy · Answer

This should help: public int BinToInt( string binaryNumber) { int multiplier = 1; int converted = 0; for ( int i = binaryNumber.Length - 1; i >= 0; i--) { int t = System. Convert .ToInt16(binaryNumber[i].ToString()); converted = converted + (t * multiplier); multiplier = multiplier * 2; } return converted; } In use: // remember SEFTU sixteen eight four two one listBox1.Items.Add(BinToInt( 00001 ).ToString()); // 1 listBox1.Items.Add(BinToInt( 00010 ).ToString()); // 2 listBox1.Items.Add(BinToInt( 00011 ).ToString()); // 3 listBox1.Items.Add(BinToInt( 00100 ).ToString()); // 4 listBox1.Items.Add(BinToInt( 00101 ).ToString()); // 5 listBox1.Items.Add(BinToInt( 00111 ).ToString()); // 7 listBox1.Items.Add(BinToInt( 01000 ).ToString()); // 8 listBox1.Items.Add(BinToInt( 10000 ).ToString()); // 16 Provided as-is. More about binary can be found here: http://en.wikipedia.org/wiki/Binary_numeral_system HTH