Convert hexadecimal to integer
I have this value in hex "E365A931A000000".
I need to convert it to integer I'm using the following code.
string hex = "E365A931A000000";
CodLibercao = Convert.ToInt32(hex);
This code is sending me the following exception:
" Input string was not in a correct format."
What am I doing wrong in conversion?
2 answers
Missed you to use the conversion base. There is also a problem because this number does not fit in a int, one must use a long (Convert.ToInt64()) to perform the conversion.
using static System.Console;
using static System.Convert;
using System.Numerics;
using System.Globalization;
public class Program {
public static void Main() {
var hex = "E365A931A000000";
WriteLine(ToInt64(hex, 16));
hex = "E365A931";
WriteLine(ToInt32(hex, 16));
hex = "E365A931A000000000";
WriteLine(BigInteger.Parse(hex, NumberStyles.HexNumber));
}
}
See working on ideone. And no .NET Fiddle. Also I put on GitHub for future reference .
I showed an example with a smaller number to fit in a int. And a conversion that accommodates numbers of any size. It should evaluate whether it is worth using the BigInteger really.
Actually converting hexadecimal to integer requires the use of Parse, more specifically this format :
var codLiberacao = int.Parse(hex, System.Globalization.NumberStyles.HexNumber);
Only I did a test and this hexadecimal is too big for a 32-bit integer, so use long or Int64 for conversion:
var codLiberacao = Int64.Parse(hex, System.Globalization.NumberStyles.HexNumber);