how to split string into two strings when it finds a number

Question

So basically if I have string a = "asd333"; I want to split this string into two strings

string b = "asd" and string c = "333"

for example string a = "aaa 555";string[]b = a.Split(' '); will make

b[0]="aaa" and b[1] = "555"

But this is not what i want i want to split string into two string withouth loosing characters and split it before a number

This is my code so far

 string text = textBox4.Text.ToString();

            char[] whitespace = new char[] { ' ','\t'  };
            string[] temp = text.Split(whitespace);

But i want to change it so string[] temp equals two string first is letters and second is numbers

Why are you replacing " " with string.Empty? Why not just split on " "? — Greg B
– Greg B, Commented Jul 17, 2014 at 14:08

Karol Marian Słuszniak · Accepted Answer · 2014-07-17 14:19:43Z

1

I think it's not the best method, but it works

    string a = "aaa333aaa333aaa22bb22bb1c1c1c";

    List<string> result = new List<string>();

    int lastSplitInedx = 0;
    for (int i = 0; i < a.Length-1; i++)
    {
        if (char.IsLetter(a[i]) != char.IsLetter(a[i + 1]))
        {
            result.Add(a.Substring(lastSplitInedx, (i + 1) - lastSplitInedx));
            lastSplitInedx = i+1;
        }
        if (i+1 == a.Length-1)
        {
            result.Add(a.Substring(lastSplitInedx));
        }
    }

    foreach (string s in result)
    {
        Console.WriteLine(s);
    }

answered Jul 17, 2014 at 14:19

Karol Marian Słuszniak

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Comments

Braj · Accepted Answer · 2014-07-17 14:13:18Z

1

Get the matched group from index 1 and 2.

String literals for use in programs:

C#

@"(\D+)\s*(\d+)"

answered Jul 17, 2014 at 14:13

Braj

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1 Comment

Braj Over a year ago

Split by this regex (?<=\D)\s*(?=\d). Here is DEMO

NiAu · Accepted Answer · 2014-07-17 14:21:31Z

-1

Search for the integer in the string and split the string at that position

string a = "str123";
string b = string.Empty;
int val;

for (int i=0; i< a.Length; i++)
{
    if (Char.IsDigit(a[i]))
        b += a[i];
}

if (b.Length>0)
    val = int.Parse(b);

edited Jul 17, 2014 at 14:21

answered Jul 17, 2014 at 14:14

NiAu

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