c# how to get specific string

Question

Hi I am facing problem to get specific string. The string as below:

string myPurseBalance = "Purse Balance: +0000004000 556080";

I want to get 4000 out only.

What is your pattern? You want to get last `4` digits that starts with `+` for example? — Soner Gönül, Jun 13 '14 at 07:29
If you want to extract desired value from the passed string and you know the format you want to output. You can use Regular Expression to do so — K D, Jun 13 '14 at 07:31
@captainsac I don't think this is a good way. It works on this case but it is not a general solution.. — Soner Gönül, Jun 13 '14 at 07:31
@SonerGönül As there is only one string specified and is there is no any pattern then substring is a good way to go for — captainsac, Jun 13 '14 at 07:33
@SonerGönül - Given the amount of effort provided by the OP I think its a pretty good answer. OP, what have you tried? — Sayse, Jun 13 '14 at 07:33
I like when one comes here, ask (politely) as simple enough question that he/she should at least try to solve by itself, and then sits at its monitor waiting someone to solve the problem for her/him. At least. What have you tried? — Steve, Jun 13 '14 at 07:33
you can do a simple split on '+' to remove string... then split again on ' ' to give only 00000004000... then convert it to int or double — angel, Jun 13 '14 at 07:35
I'm with @captainsac - given the example in the question, SubString will work 100%. Now, if the questioner wanted something more flexible, they should have made that clear. — Polyfun, Jun 13 '14 at 08:14

score 3 · Answer 1 · answered Jun 13 '14 at 07:31

3

if your string format/pattern is fix then you can get specific value

  string myPurseBalance = "Purse Balance: +0000004000 556080";
            //
  var newPursebal =Convert.ToDouble(myPurseBalance.Split('+')[1].Split(' ')[0]);

answered Jun 13 '14 at 07:31

Anant Dabhi

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1

Why double? Just confusing matters – weston Jun 13 '14 at 07:49

score 2 · Accepted Answer · answered Jun 13 '14 at 07:32

2

You can use this regular expression:

string extract = Regex.Replace(myPurseBalance, @"(.*?)\: \+[0]*(?<val>\d+) (.*)", "${val}")

It searches for the decimals after :, trims the leading 0s and removes everything after the last whitespace.

answered Jun 13 '14 at 07:32

Patrick Hofman

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score 1 · Answer 3 · answered Jun 13 '14 at 07:37

1

You can use string.Split to get the +0000004000 and then use string.Substring to get the last four characters by passing the Length-4 as starting index.

string str = myPurseBalance.Split(' ')[2];
str = str.Substring(str.Length-4);

answered Jun 13 '14 at 07:37

Adil

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score 1 · Answer 4 · answered Jun 13 '14 at 07:40

Learn Regex . Here is just simple tutorial

using System; 
using System.Text.RegularExpressions;
namespace regex
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            string input = "Purse Balance: +0000504000 556080";

    // Here we call Regex.Match.
    Match match = Regex.Match(input, @"\+[0]*(\d+)",
        RegexOptions.IgnoreCase);

    // Here we check the Match instance.
    if (match.Success)
    {
        // Finally, we get the Group value and display it.
        string key = match.Groups[1].Value;
        Console.WriteLine(key);
    }
        }
    }
}

c# how to get specific string

4 Answers4