C# convert integer to hex and back again

How can I convert the following?

2934 (integer) to B76 (hex)

Let me explain what I am trying to do. I have User IDs in my database that are stored as integers. Rather than having users reference their IDs I want to let them use the hex value. The main reason is because it's shorter.

So not only do I need to go from integer to hex but I also need to go from hex to integer.

Is there an easy way to do this in C#?


// Store integer 182
int intValue = 182;
// Convert integer 182 as a hex in a string variable
string hexValue = intValue.ToString("X");
// Convert the hex string back to the number
int intAgain = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);

from http://www.geekpedia.com/KB8_How-do-I-convert-from-decimal-to-hex-and-hex-to-decimal.html


Use:

int myInt = 2934;
string myHex = myInt.ToString("X");  // Gives you hexadecimal
int myNewInt = Convert.ToInt32(myHex, 16);  // Back to int again.

See How to: Convert Between Hexadecimal Strings and Numeric Types (C# Programming Guide) for more information and examples.


Try the following to convert it to hex

public static string ToHex(this int value) {
  return String.Format("0x{0:X}", value);
}

And back again

public static int FromHex(string value) {
  // strip the leading 0x
  if ( value.StartsWith("0x", StringComparison.OrdinalIgnoreCase)) {
    value = value.Substring(2);
  }
  return Int32.Parse(value, NumberStyles.HexNumber);
}
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