How to get ASCII value of string in C#

Question

I want to get the ASCII value of characters in a string in C#.

If my string has the value "9quali52ty3", I want an array with the ASCII values of each of the 11 characters.

How can I get ASCII values in C#?

Do you mean you only want the alphabetic characters and not the digits? So you want "quality" as a result? Cause then talking about ASCII makes little sense. — Lars Truijens
– Lars Truijens, Commented Dec 30, 2008 at 16:35
I want Ascii of each character from that string ,Ascii of digits as well as ascii of word "quality" — RBS
– RBS, Commented Dec 30, 2008 at 16:36
What you mean is that you want the numeric ASCII value of each character in the string, assuming the entire string can be represented in ASCII. Your current wording is very confusing. — bzlm
– bzlm, Commented Jul 24, 2009 at 8:14

score 236 · Accepted Answer · 2008-12-30 19:49:53Z

236

string value = "9quali52ty3";

// Convert the string into a byte[].
byte[] asciiBytes = Encoding.ASCII.GetBytes(value);

You now have an array of the ASCII value of the bytes. I got the following:

57 113 117 97 108 105 53 50 116 121 51

edited Dec 30, 2008 at 19:49

answered Dec 30, 2008 at 16:38

Brig Lamoreaux

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3 Comments

Nick Kapatais Over a year ago

This shows me System.Byte[]. You need to loop through the chars in the word. Not sure how you got it to work. Helped the OP though which is what matters.

Tom Blodget Over a year ago

Note: Encoding.ASCII is configured to emit the ASCII code unit for the replacement character ('?') for characters that are not in the ASCII character set. Other options—including throwing an exception—are available in the Encoding class. And, of course, other character encodings—especially UTF-8—are available, too; One should question whether it is ASCII that is actually wanted.

Leandro Bardelli Over a year ago

using System.Text;

LeppyR64 · Accepted Answer · 2008-12-30 16:28:01Z

67

string s = "9quali52ty3";
foreach(char c in s)
{
  Console.WriteLine((int)c);
}

answered Dec 30, 2008 at 16:28

LeppyR64

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1 Comment

Lars Truijens Over a year ago

The resulting codes are Unicode numbers and could potentially contain non ASCII codes.

jason · Accepted Answer · 2009-07-24 10:50:26Z

28

This should work:

string s = "9quali52ty3";
byte[] ASCIIValues = Encoding.ASCII.GetBytes(s);
foreach(byte b in ASCIIValues) {
    Console.WriteLine(b);
}

edited Jul 24, 2009 at 10:50

answered Dec 30, 2008 at 16:29

jason

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Comments

Lars Truijens · Accepted Answer · 2008-12-30 16:29:49Z

10

Do you mean you only want the alphabetic characters and not the digits? So you want "quality" as a result? You can use Char.IsLetter or Char.IsDigit to filter them out one by one.

string s = "9quali52ty3";
StringBuilder result = new StringBuilder();
foreach(char c in s)
{
  if (Char.IsLetter(c))  
    result.Add(c);
}
Console.WriteLine(result);  // quality

answered Dec 30, 2008 at 16:29

Lars Truijens

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Comments

Peter Mortensen · Accepted Answer · 2014-07-17 15:53:42Z

5

string text = "ABCD";
for (int i = 0; i < text.Length; i++)
{
  Console.WriteLine(text[i] + " => " + Char.ConvertToUtf32(text, i));
}

If I remember correctly, the ASCII value is the number of the lower seven bits of the Unicode number.

edited Jul 17, 2014 at 15:53

Peter Mortensen

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answered Dec 30, 2008 at 16:30

Rauhotz

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Comments

VMAtm · Accepted Answer · 2012-12-04 07:39:23Z

4

string value = "mahesh";

// Convert the string into a byte[].
byte[] asciiBytes = Encoding.ASCII.GetBytes(value);

for (int i = 0; i < value.Length; i++)


    {
        Console.WriteLine(value.Substring(i, 1) + " as ASCII value of: " + asciiBytes[i]);
    }

edited Dec 4, 2012 at 7:39

VMAtm

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answered Dec 4, 2012 at 7:20

mahesh

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1 Comment

mahesh Over a year ago

this is also one of example to implement ascii value for each charcter in given string

Peter Mortensen · Accepted Answer · 2014-07-17 15:58:03Z

4

This program will accept more than one character and output their ASCII value:

using System;
class ASCII
{
    public static void Main(string [] args)
    {
        string s;
        Console.WriteLine(" Enter your sentence: ");
        s = Console.ReadLine();
        foreach (char c in s)
        {
            Console.WriteLine((int)c);
        }
    }
}

edited Jul 17, 2014 at 15:58

Peter Mortensen

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answered Mar 7, 2014 at 10:40

M hasan

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Comments

T.S. · Accepted Answer · 2020-06-10 23:54:32Z

4

Or in LINQ:

string value = "9quali52ty3";
var ascii_values = value.Select(x => (int)x);
var as_hex = value.Select(x => ((int)x).ToString("X02"));

edited Jun 10, 2020 at 23:54

T.S.

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answered Feb 27, 2012 at 22:22

ZagNut

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Comments

Peter Mortensen · Accepted Answer · 2014-07-17 15:54:15Z

3

If you want the charcode for each character in the string, you could do something like this:

char[] chars = "9quali52ty3".ToCharArray();

edited Jul 17, 2014 at 15:54

Peter Mortensen

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answered Dec 30, 2008 at 16:31

Neil Barnwell

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Comments

Peter Mortensen · Accepted Answer · 2014-07-17 15:54:37Z

3

byte[] asciiBytes = Encoding.ASCII.GetBytes("Y");
foreach (byte b in asciiBytes)
{
    MessageBox.Show("" + b);
}

edited Jul 17, 2014 at 15:54

Peter Mortensen

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answered Jul 21, 2011 at 10:25

moleatom

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Comments

Tony Dallimore · Accepted Answer · 2011-09-30 14:31:00Z

Earlier responders have answered the question but have not provided the information the title led me to expect. I had a method that returned a one character string but I wanted a character which I could convert to hexadecimal. The following code demonstrates what I thought I would find in the hope it is helpful to others.

  string s = "\ta£\x0394\x221A";   // tab; lower case a; pound sign; Greek delta;
                                   // square root  
  Debug.Print(s);
  char c = s[0];
  int i = (int)c;
  string x = i.ToString("X");
  c = s[1];
  i = (int)c;
  x = i.ToString("X");
  Debug.Print(c.ToString() + " " + i.ToString() + " " + x);
  c = s[2];
  i = (int)c;
  x = i.ToString("X");
  Debug.Print(c.ToString() + " " + i.ToString() + " " + x);
  c = s[3];
  i = (int)c;
  x = i.ToString("X");
  Debug.Print(c.ToString() + " " + i.ToString() + " " + x);
  c = s[4];
  i = (int)c;
  x = i.ToString("X");
  Debug.Print(c.ToString() + " " + i.ToString() + " " + x);

The above code outputs the following to the immediate window:

a£Δ√

a 97 61

£ 163 A3

Δ 916 394

√ 8730 221A

Peter Mortensen · Accepted Answer · 2014-07-17 15:55:25Z

2

You can remove the BOM using:

//Create a character to compare BOM
char byteOrderMark = (char)65279;
if (sourceString.ToCharArray()[0].Equals(byteOrderMark))
{
    targetString = sourceString.Remove(0, 1);
}

edited Jul 17, 2014 at 15:55

Peter Mortensen

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answered Mar 9, 2013 at 11:54

Md Shahzad Adil

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Comments

MA Nadeem · Accepted Answer · 2017-06-24 11:28:33Z

0

I want to get the ASCII value of characters in a string in C#.

Everyone confer answer in this structure. If my string has the value "9quali52ty3", I want an array with the ASCII values of each of the 11 characters.

but in console we work frankness so we get a char and print the ASCII code if i wrong so please correct my answer.

 static void Main(string[] args)
        {
            Console.WriteLine(Console.Read());
            Convert.ToInt16(Console.Read());
            Console.ReadKey();
        }

answered Jun 24, 2017 at 11:28

MA Nadeem

1

2 Comments

O. Jones Over a year ago

This answer could use a little more explanation. If you have a colleague more fluent in English, with respect you should ask for help.

MA Nadeem Over a year ago

my explanation is very simple because my code is very simple without any variables but used a simple concept how can print ASCII value individual simple get a char and convert the char in integer value so please you implement this and if i have mistake in my explanation so please you correct this thanks

F. Harthoorn · Accepted Answer · 2019-01-12 00:05:13Z

0

Why not the old fashioned easy way?

    public int[] ToASCII(string s)
    {
        char c;
        int[] cByte = new int[s.Length];   / the ASCII string
        for (int i = 0; i < s.Length; i++)
        {
            c = s[i];                        // get a character from the string s
            cByte[i] = Convert.ToInt16(c);   // and convert it to ASCII
        }
        return cByte;
    }

edited Jan 12, 2019 at 0:05

answered Jan 11, 2019 at 15:15

F. Harthoorn

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Comments

Monarc Dev · Accepted Answer · 2020-05-29 14:52:57Z

-1

    string nomFile = "9quali52ty3";  

     byte[] nomBytes = Encoding.ASCII.GetBytes(nomFile);
     string name = "";
     foreach (byte he in nomBytes)
     {
         name += he.ToString("X02");
     }
`
     Console.WriteLine(name);

// it's` better now ;)

edited May 29, 2020 at 14:52

answered Mar 16, 2020 at 15:46

Monarc Dev

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2 Comments

Dharman Over a year ago

While this code may solve the question, including an explanation of how and why this solves the problem would really help to improve the quality of your post, and probably result in more up-votes. Remember that you are answering the question for readers in the future, not just the person asking now. Please edit your answer to add explanations and give an indication of what limitations and assumptions apply.

BDL Over a year ago

Gives a compile error: "Unexpected character". The two ` after the ToString probably shouldn't be there.

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