c# string to hex , hex to byte conversion

问题

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.

回答1:

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);    

回答2:

Try this:

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

回答3:

have you tried to use this?

Byte.parse

来源：https://stackoverflow.com/questions/8576296/c-sharp-string-to-hex-hex-to-byte-conversion