c# string to hex , hex to byte conversion

Question

I have a method which takes a hex value and assign it as a plaintext but type of byte like that

byte plainText = 0xd7;

I want to take this value from textbox ,for exmaple the user will type d7 to textbox and ı will assign it like

byte plaintText = 0xd7

I could not achive that.

score 25 · Accepted Answer · answered Dec 20 '11 at 13:40

25

You can use the Convert.ToByte(String, Int32) method with the base set to 16 (hexadecimal):

String text = "d7";
byte value = Convert.ToByte(text, 16);

answered Dec 20 '11 at 13:40

Myles McDonnell · Answer 2 · 2011-12-20T13:45:24.283

11

Try this:

var myByte = Byte.Parse("d7", NumberStyles.HexNumber)

edited Dec 20 '11 at 13:45

answered Dec 20 '11 at 13:39

Myles McDonnell

score -2 · Answer 3 · answered Dec 20 '11 at 13:40

-2

have you tried to use this?

Byte.parse

answered Dec 20 '11 at 13:40

Joseph Le Brech

yes ı tried byte myByte = Byte.Parse(txtKey1.Text); gives error like input string is not correct format – mixo_17 Dec 20 '11 at 13:43
@sebastian is the right answer as you have to supply the base. – Joseph Le Brech Dec 20 '11 at 13:47

3 Answers3