Convert string numbers to Array C#

Question

Lets say I have a string str = "012345"; I want to convert it to an array which would look like intAry = {0, 1, 2, 3, 4, 5};. Any ideas?

I tried like this..

for (int i = 0; i < str.Length; i++)
{
   intAry[i] = Convert.ToInt32(str[i]);
}

But what went to array are like 48, 49, etc. Which correct method should I use here?

Just minus the ASCII code of '0', which is 48 (in decimal). In ASCII and Unicode, digits are consecutive in sequence. This is a pretty standard trick when using "old" programming languages (e.g. C). — Stephen Chung
– Stephen Chung, Commented Apr 20, 2011 at 11:30

jgauffin · Accepted Answer · 2011-04-20 11:36:34Z

12

    for (int i = 0; i < str.Length; i++)
        intAry[i] = str[i] - '0';

Update

Or as LINQ:

var array = str.Select(ch => ch - '0').ToArray();

edited Apr 20, 2011 at 11:36

answered Apr 20, 2011 at 11:30

jgauffin

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4 Comments

Emile Over a year ago

I think you mean str[i] - '0'

El Ronnoco Over a year ago

Should that not be str[i] - '0'?

Gabriel Over a year ago

you menat intAry[i] = Convert.ToInt32(str[i] - '0');

Ye Myat Aung Over a year ago

Yup. str[i] - '0' gave me what I wanted :)

crypted · Accepted Answer · 2011-04-20 11:31:41Z

4

How about this.

  string source = "12345";
   Int32[] array=source.Select(x => Int32.Parse(x.ToString())).ToArray();

but remember every character within source should be convertible to an Integer

answered Apr 20, 2011 at 11:31

crypted

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Comments

Blazes · Accepted Answer · 2011-04-20 11:34:03Z

0

48, 49, etc. went in because that is the ASCII value of '0'. If you subtract '0' from the char, it will give you the correct integer. No convert required.

intAry[i] = str[i] - '0';

answered Apr 20, 2011 at 11:34

Blazes

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