How to convert unicode string to int in C#?

Question

I have a string from a source which is a unicode digital number like this:

n = ۱۱۷ => 117

now I want to convert this string to int. but when i try to use Convert.ToInt I get this exception. How can I resolve this problem?

Maybe u should check out this http://stackoverflow.com/questions/5879437/how-to-convert-arabic-number-to-int — Flardryn, Mar 04 '17 at 14:18

score 1 · Accepted Answer · answered Mar 04 '17 at 14:27

1

    Int32 value = 0;
    if (Int32.TryParse(String.Join(String.Empty, "۱۱۷".Select(Char.GetNumericValue)), out value))
    {
        Console.WriteLine(value);
        //....
    }

answered Mar 04 '17 at 14:27

Sergey Vasiliev

803
8
19

this solution was shortest and best method – Navid_pdp11 Mar 06 '17 at 07:22
@Navid_pdp11 no support here for number starting with `+` or `-` – aloisdg Mar 06 '17 at 07:33

aloisdg · Answer 2 · 2017-03-04T14:45:34.793

We will use the method GetNumericValue(), to convert each character into a number. The documentation is clear:

Converts a specified numeric Unicode character to a double-precision floating-point number.

Demo

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {   
        Console.WriteLine(ParseNumeric("۱۱۷"));
    }


    public static int ParseNumeric(string input)
    {
        return int.Parse(string.Concat(input.Select(c =>
            "+-".Contains(c)
                ? c.ToString()
                : char.GetNumericValue(c).ToString())));
    }
}

And if you want to support double, replace int with double and add a . in the string before Contains().

If you prefer to use TryParse instead of a basic Parse here you go:

public static bool TryParseNumeric(string input, out int numeric)
{
    return int.TryParse(string.Concat(input.Select(c =>
        "+-".Contains(c)
            ? c.ToString()
            : char.GetNumericValue(c).ToString())), out numeric);
}

How to convert unicode string to int in C#?

2 Answers2