convert from textbox and add difference values

Question

0.00/5 (No votes)

See more:

hi i have a textbox and want to have a serial data transmission.
i write a number like 610 on textbox, and want to send this number as 2 bytes by serial port.
how can i convert this textbox.Text to 2 bytes?
and next question, how can i add different values? for example, i have 0xAA, 0xBB, ... and 2 bytes that reached from conversion 610 to 2 bytes.

Posted 28-Oct-13 19:35pm

mohsenvasefi

Add a Solution

Comments

BillWoodruff 29-Oct-13 3:07am

If you start doing some basic study of C# .NET fundamentals, and such essential areas as numeric representation, and number conversion: then, in the future, you will become an independently productive programmer.

Learning how to look-up, and access, basic information, quickly, is an essential skill for any programmer who wishes to become ... and stay ... productive, because: the tools we use are constantly changing.

If you continue to ask a question here for every single line of code in every program you write, you will never become productive.

There is no substitute for making your own intellectual effort.

You may think I am personally "attacking" you by saying this, but that is not my intent. I, and many other people here, who have had (or have) successful careers as programmers, want to help other programmers become successful; we want to educate.

Just providing code-fixes, and writing other people's programs, is not education.

Think about it. Bill

Naresh1277 29-Oct-13 3:30am

Hey Bill, I understand, and I will sincerely try to do more programing in the basics of C#.Net

Thanks for your Concern!!
I guess this should be the first motto for every individual associate in the CodeProject

BillWoodruff 29-Oct-13 3:46am

Naresh, Helping other people on CP develop as programmers is a great way to continually improve, and refine, your own knowledge ! Your answers are thoughtful, and helpful.

"rahi gulzar to phool khilenge" Kabir

mohsenvasefi 29-Oct-13 3:26am

i know what you say, but i haven't any time and must finish this project!

BillWoodruff 29-Oct-13 3:47am

That's understandable ! I'll try to shut-up, and be helpful :)

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Naresh1277 · Answer 1 · 2013-10-28T19:42:00

Solution 1

C#

public static byte[] StringToByteArray(String hex)
{
  int NumberChars = hex.Length;
  byte[] bytes = new byte[NumberChars / 2];
  for (int i = 0; i < NumberChars; i += 2)
  bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
  return bytes;
 }

Posted 28-Oct-13 19:42pm

Naresh1277

Comments

mohsenvasefi 29-Oct-13 2:27am

thanks, could you explain how does it work?

Naresh1277 · Answer 2 · 2013-10-28T19:44:00

Solution 2

C#

var myBuffer = new byte[20];

myBuffer = ASCIIEncoding.ASCII.GetBytes(textBox.Text);

Posted 28-Oct-13 19:44pm

Naresh1277

Comments

mohsenvasefi 29-Oct-13 2:27am

thanks, could you explain how does it work? and how can i add this mybuffer by other bytes as hex(0xAA+0xBB+...+bytes of mybuffer)?

Naresh1277 29-Oct-13 3:24am

you have do R&D on it ..

mohsenvasefi 29-Oct-13 3:34am

what's R&D?

Naresh1277 29-Oct-13 3:25am

where are you using this serial transmission , I mean is it used in NetworkPrograming

mohsenvasefi 29-Oct-13 3:37am

not network programming, i'm using it in transfer data between micro controller and PC. i want to make CRC by add bytes as said

Sergey Alexandrovich Kryukov 13-May-15 0:52am

Your first line deserves vote of 1.
The result returned from the array initialization is discarded, and the reference is replaced with the new reference returned by GetBytes. The "answer" reveals complete misunderstanding of CLR programming and managed code in general.
—SA

BillWoodruff · Answer 3 · 2013-10-28T22:08:00

I think Naresh's answers gave you what you need, but I'll add a few comments:

1. a number is independent of its representation in .NET. if you write:

int Y = 0xAA + 0xBB; // the value of Y is #357 decimal, &x0165 in hex

2. you can easily get the hex representation of a number as a string:

// see ToString() documentation
// "X" means hex values > 9 shown in upper-case
// "4" means the representation will be 4 characters long
string hexOfY = 357.ToString("X4");

3. going from a TextBox string to a hex value is easy:

C#

string HexFromTextBox = Convert.ToInt32(textBox1.Text).ToString("X4");

// much better practice to use TryParse 
// to make sure you've got a valid entry:

Int16 tbValue;

bool okay16BitValue = Int16.TryParse(textBox1.Text, out tbValue);

// error !
if (! okay16BitValue) throw new ArgumentException("TextBox string not a 16-bit integer");

// now tbValue has a valid 16bit integer you can convert to a hex string if you wish

4. to get the high and low bytes of a 16-bit number > 255 and < 65536:

C#

// use of bit-shift
byte highByte = (byte)(357 >> 8);

// use of bit-wise and
byte lowByte = (byte)(357 & 0xff);

convert from textbox and add difference values

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0

Existing Members

...or Join us