Wrong in convert four byte to integer then display in textbox

Question

I use array of byte and I need to convert this 4 byte to integer and display result in textbox ,the result must 320 but it display 64

byte[] bb = new byte[4] { 64, 1, 0, 0 }; 
textBox1.Text = Convert.ToInt32(bb[0]).ToString(); // display result 64 it must 320

what is wrong??

Answer 1

The method you need is BitConverter.ToInt32()

Change the code such that:

byte[] bb = new byte[4] { 64, 1, 0, 0 }; 
textBox1.Text = BitConverter.ToInt32(bb, 0).ToString();

Note that BitConnverter takes a byte array and a start index.

In your example, you just have a 4 byte array. if you are going to read from a large array and convert the values one by one, make sure you pass the correct index to the ToInt32 method.